Restorative Dentistry & Endodontics

Research Articles

Pattern of endodontic instrument separation and factors affecting its retrieval: a 10-year retrospective observational study in a postgraduate institute: Velmurugan Natanasabapathy, Aswathi Varghese, Paul Kevin Abishek Karthikeyan, Srinivasan Narasimhan; Restor Dent Endod 2025;50(1):e7. Published online February 19, 2025; DOI: https://doi.org/10.5395/rde.2025.50.e7

Abstract PDF PubReader ePub: Objectives
This study aimed to assess the pattern of endodontic instrument separation, their retrievability, and factors affecting its retrieval, in a postgraduate institute.
Methods
Cases referred for the management of separated endodontic instruments (SEI) from 2013 to 2023 were considered for this study. Data related to demographics, tooth type, file type, and retrieval were documented in an Excel sheet. Eight prognostic factors assumed to influence the retrieval were analyzed in this study. The secondary aim was to compare the pattern of SEI and retrievability between conventional nickel-titanium files and newer generation heat-treated nickel-titanium files. Retrieval was attempted by a senior endodontist under the dental operating microscope. Various ultrasonic tips and a Broken Tool Removal loop system were used during retrieval. Simple descriptive statistics were performed. Binomial logistic regression was done to identify the effect of the eight prognostic factors on the retrieval outcome.
Results
A total of 190 SEI was reported. SEI occurred more often in posterior teeth than anterior teeth, mandibular arch than maxillary arch, and in larger files than smaller files. Separation occurred more often in the apical third compared to the other levels. Retrieval was attempted in 88 cases and successful in 70 cases (79.5%). The larger taper and apical position of the SEI negatively influenced the retrieval by 1.4 and 8.7 times, respectively.
Conclusions
Retrieval of SEI was successful in the majority of the cases. An increase in taper and apically placed SEI negatively impacted the retrieval. There was no difference in the pattern of separation nor retrievability between conventional nickel-titanium files and newer generation heat-treated nickel-titanium files.

612 View
65 Download

Shaping ability and cyclic fatigue resistance between Genius ProFlex, ZenFlex, and TruNatomy rotary systems: an experimental study: Raimundo Sales de Oliveira Neto, Murilo Priori Alcalde, Pedro Cesar Gomes Titato, Pedro Henrique Souza Calefi, Carlos Alberto Spironelli Ramos, Guilherme Ferreira da Silva, Rodrigo Ricci Vivan, Marco Antonio Hungaro Duarte; Restor Dent Endod 2025;50(1):e9. Published online February 13, 2025; DOI: https://doi.org/10.5395/rde.2025.50.e9

Abstract PDF PubReader ePub: Objectives
The aim of this study was to investigate the efficacy of three newly introduced rotary endodontic systems: Genius ProFlex (Medidenta), TruNatomy (Dentsply Maillefer), and ZenFlex (Kerr).
Methods
Forty-five mandibular molars with root canal curvatures <5° were utilized. Micro-computed tomography scans were performed pre- and post-preparation to assess apical transportation, centralization, percentage of dentin wear, and canal volume alterations. Eight instruments of each diameter underwent cyclic fatigue testing.
Results
The percentage of dentin wear on mesial and distal walls showed no significant differences among ZenFlex, TruNatomy, and Genius ProFlex at 1, 2, 3, and 4 mm from the apical foramen and root canal orifice (p > 0.05). Centering ability varied in the mesiolingual canal (p < 0.05). No notable differences were observed in transportation (p > 0.05). Genius ProFlex demonstrated lower volumetric changes (p < 0.05). There were significant differences in cyclic fatigue, with higher values for Genius ProFlex and lower values for TruNatomy (p < 0.05).
Conclusions
The three nickel-titanium rotary instruments are safe and efficient for root canal preparation, with Genius ProFlex exhibiting superior cyclic fatigue resistance.

490 View
61 Download

Predictive factors in the retrieval of endodontic instruments: the relationship between the fragment length and location: Ricardo Portigliatti, Eugenia Pilar Consoli Lizzi, Pablo Alejandro Rodríguez; Restor Dent Endod 2024;49(4):e35. Published online September 9, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e35

Abstract PDF PubReader ePub

Objectives

This study aimed to relate the file fragment length and location in the root canal to the retrieval chances, the clinical time required and the occurrence of secondary fractures.

Materials and Methods

Sixty clinical cases of fractured instruments were included in this study. They were classified according to the instrument length and the location of the root canal. In each group, the success rate in the instrument retrieval, the clinical time required and the occurrence of secondary fractures were evaluated. The collected data were analyzed using the Kruskal-Wallis test on the basis of a 0.05 significance level.

Results

The fragment length showed no significant influence on the assessed variables (p > 0.05). The root third where the instrument was located resulted in an increased clinical time, with statistically significant differences (p < 0.05). However, the procedure success rate and the occurrence of secondary fractures showed no association with these variables.

Conclusions

In accordance with the findings of this study, the fractured fragment length did not influence any of the variables assessed, but it is suggested to focus on the fragment location inside the root canal to decide the retrieval of a fractured instrument.

Citations

Citations to this article as recorded by

Neodymium-Doped Yttrium Aluminum Perovskite (Nd:YAP) Laser in the Elimination of Endodontic Nickel-Titanium Files Fractured in Rooted Canals (Part 2: Teeth With Significant Root Curvature)
Amaury Namour, Marwan El Mobadder, Clément Cerfontaine, Patrick Matamba, Lucia Misoaga, Delphine Magnin , Praveen Arany, Samir Nammour
Cureus.2025;[Epub] CrossRef

617 View
104 Download
1 Crossref

Micro-CT evaluation of the removal of root fillings using rotary and reciprocating systems supplemented by XP-Endo Finisher, the Self-Adjusting File, or Er,Cr:YSGG laser: Gülsen Kiraz, Bulem Üreyen Kaya, Mert Ocak, Muhammet Bora Uzuner, Hakan Hamdi Çelik; Restor Dent Endod 2023;48(4):e36. Published online October 23, 2023; DOI: https://doi.org/10.5395/rde.2023.48.e36

Abstract PDF PubReader ePub

Objectives

This study aimed to compare the effectiveness of a single-file reciprocating system (WaveOne Gold, WOG) and a multi-file rotary system (ProTaper Universal Retreatment, PTUR) in removing canal filling from severely curved canals and to evaluate the possible adjunctive effects of XP-Endo Finisher (XPF), the Self-Adjusting File (SAF), and an erbium, chromium: yttrium, scandium, gallium garnet (Er,Cr:YSGG) laser using micro-computed tomography (μCT).

Materials and Methods

Sixty-six curved mandibular molars were divided into 2 groups based on the retreatment technique and then into 3 based on the supplementary method. The residual filling volumes and root canals were evaluated with μCT before and after retreatment, and after the supplementary steps. The data were statistically analyzed with the t-test, Mann-Whitney U test, analysis of covariance, and factorial analysis of variance (p < 0.05).

Results

PTUR and WOG showed no significant difference in removing filling materials (p > 0.05). The supplementary techniques were significantly more effective than reciprocating or rotary systems only (p < 0.01). The supplementary steps showed no significant differences in canal filling removal effectiveness (p > 0.05), but XPF showed less dentin reduction than the SAF and Er,Cr:YSGG laser (p < 0.01).

Conclusions

The supplementary methods significantly decreased the volume of residual filling materials. XPF caused minimal changes in root canal volume and might be preferred for retreatment in curved root canals. Supplementary approaches after retreatment procedures may improve root canal cleanliness.

Citations

Citations to this article as recorded by

Trends in dentomaxillofacial radiology
Kıvanç Kamburoğlu
World Journal of Radiology.2025;[Epub] CrossRef
Retrieval of AH Plus Bioceramic and Ceraseal Versus AH Plus in Endodontic Retreatment
Eurok Shim, Jee Woo Son, Jiyoung Kwon, Hyun-Jung Kim, Ji-Hyun Jang, Seok Woo Chang, Soram Oh
Journal of Clinical Medicine.2025; 14(6): 1826. CrossRef
Characteristics and Effectiveness of XP‐Endo Files and Systems: A Narrative Review
Sarah M. Alkahtany, Rana Alfadhel, Aseel AlOmair, Sarah Bin Durayhim, Kee Y. Kum
International Journal of Dentistry.2024;[Epub] CrossRef
Effect of the filling technique on the filling removal from oval-shaped canals
Lislaine Valerio, Lisa Yurie Oda, Felipe Andretta Copelli, Clarissa Teles Rodrigues, Everdan Carneiro, Marco Antonio Hungaro Duarte, Bruno Cavalini Cavenago
Clinical Oral Investigations.2024;[Epub] CrossRef

455 View
28 Download
4 Web of Science
4 Crossref

Effectiveness and safety of rotary and reciprocating kinematics for retreatment of curved root canals: a systematic review of in vitro studies: Lucas Pinho Simões, Alexandre Henrique dos Reis-Prado, Carlos Roberto Emerenciano Bueno, Ana Cecília Diniz Viana, Marco Antônio Húngaro Duarte, Luciano Tavares Angelo Cintra, Cleidiel Aparecido Araújo Lemos, Francine Benetti; Restor Dent Endod 2022;47(2):e22. Published online April 6, 2022; DOI: https://doi.org/10.5395/rde.2022.47.e22

Abstract PDF PubReader ePub

Objectives

This systematic review (register-osf.io/wg7ba) compared the efficacy and safety of rotary and reciprocating kinematics in the removal of filling material from curved root canals.

Materials and Methods

Only in vitro studies evaluating both kinematics during retreatment were included. A systematic search (PubMed/MEDLINE, Scopus, and other databases, until January 2021), data extraction, and risk of bias analysis (Joanna Briggs Institute checklist) were performed. Efficacy in filling removal was the primary outcome.

Results

The search resulted in 2,795 studies, of which 15 were included. Efficacy was measured in terms of the remaining filling material and the time required for this. Nine studies evaluated filling material removal, of which 7 found no significant differences between rotary and reciprocating kinematics. Regarding the time for filling removal, 5 studies showed no difference between both kinematics, 2 studies showed faster results with rotary systems, and other 2 showed the opposite. No significant differences were found in apical transportation, centering ability, instrument failure, dentin removed and extruded debris. A low risk of bias was observed.

Conclusions

This review suggests that the choice of rotary or reciprocating kinematics does not influence the efficacy of filling removal from curved root canals. Further studies are needed to compare the kinematics safety in curved root canals.

Citations

Citations to this article as recorded by

Fifteen years of engine‐driven nickel–titanium reciprocating instruments, what do we know so far? An umbrella review
Felipe Immich, Lucas Peixoto de Araújo, Rafaella Rodrigues da Gama, Wellington Luiz de Oliveira da Rosa, Evandro Piva, Giampiero Rossi‐Fedele
Australian Endodontic Journal.2024; 50(2): 409. CrossRef
Efficacy of Various Heat-treated Retreatment File Systems on the Apical Deformity and Canal Centering Ability in a Single-rooted Teeth using Nano CT
Swathi S, Pradeep Solete, Ganesh Jeevanandan, Delphine Priscilla Antony S, Kavalipurapu Venkata Teja, Dona Sanju
The Open Dentistry Journal.2024;[Epub] CrossRef
Micro-CT evaluation of the removal of root fillings using rotary and reciprocating systems supplemented by XP-Endo Finisher, the Self-Adjusting File, or Er,Cr:YSGG laser
Gülsen Kiraz, Bulem Üreyen Kaya, Mert Ocak, Muhammet Bora Uzuner, Hakan Hamdi Çelik
Restorative Dentistry & Endodontics.2023;[Epub] CrossRef
Influence of sodium hypochlorite on cyclic fatigue resistance of nickel–titanium instruments: A systematic review and meta-analysis of in vitro studies
Alexandre Henrique dos Reis-Prado, Lucas Guimarães Abreu, Lara Cancella de Arantes, Kiani dos Santos de Paula, Sabrina de Castro Oliveira, Juliana Goto, Ana Cecília Diniz Viana, Francine Benetti
Clinical Oral Investigations.2023; 27(11): 6291. CrossRef
Retreatment of XP-endo Shaper and R-Endo files in curved root canals
Hayam Y. Hassan, Fahd M. Hadhoud, Ayman Mandorah
BMC Oral Health.2023;[Epub] CrossRef
Advancing Endodontics through Kinematics
Shilpa Bhandi, Dario Di Nardo, Francesco Pagnoni, Rosemary Abbagnale
World Journal of Dentistry.2023; 14(6): 479. CrossRef

326 View
9 Download
5 Web of Science
6 Crossref

Comparison of the cyclic fatigue resistance of One Curve, F6 Skytaper, Protaper Next, and Hyflex CM endodontic files: Charlotte Gouédard, Laurent Pino, Reza Arbab-Chirani, Shabnam Arbab-Chirani, Valérie Chevalier; Restor Dent Endod 2022;47(2):e16. Published online March 4, 2022; DOI: https://doi.org/10.5395/rde.2022.47.e16

Abstract PDF PubReader ePub

Objectives

This study compared the cyclic fatigue resistance of One Curve (C wire) and F6 Skytaper (conventional austenite nickel-titanium [NiTi]), and 2 instruments with thermo-mechanically treated NiTi: Protaper Next X2 (M wire) and Hyflex CM (CM wire).

Materials and Methods

Ten new instruments of each group (size: 0.25 mm, 6% taper in the 3 mm tip region) were tested using a rotary bending machine with a 60° curvature angle and a 5 mm curvature radius, at room temperature. The number of cycles until fracture was recorded. The length of the fractured instruments was measured. The fracture surface of each fragment was examined with a scanning electron microscope (SEM). The data were analyzed using one-way analysis of variance and the post hoc Tukey test. The significance level was set at 0.05.

Results

At 60°, One Curve, F6 Skytaper and Hyflex CM had significantly longer fatigue lives than Protaper Next X2 (p < 0.05). No statistically significant differences were found in the cyclic fatigue lives of One Curve, F6 Skytaper, and Hyflex CM (p > 0.05). SEM images of the fracture surfaces of the different instruments showed typical features of fatigue failure.

Conclusions

Within the conditions of this study, at 60° and with a 5 mm curvature radius, the cyclic fatigue life of One Curve was not significantly different from those of F6 Skytaper and Hyflex CM. The cyclic fatigue lives of these 3 instruments were statistically significantly longer than that of Protaper Next.

Citations

Citations to this article as recorded by

Evaluation of cyclic fatigue in three pediatric endodontic rotary file systems in root canals of primary molars: A finite element analysis (FEA)
Monika sri S.S., K.C. Vignesh, K. Vivek, Kavitha Swaminathan, Selvakumar Haridoss
Journal of Oral Biology and Craniofacial Research.2025; 15(2): 310. CrossRef
Stress analysis of different experimental finite element models of rotary endodontic instruments
Manar M. Galal, Amira Galal Ismail, Nada Omar
Bulletin of the National Research Centre.2025;[Epub] CrossRef
Analyzing Surface Morphology Changes Induced by Cyclic Fatigue in Three Different Nickel–Titanium Rotary Files Using Scanning Electron Microscopy Analysis
Chintan Joshi, Mahima P Jain, Sweety M Thumar, Jay H Dave, Applu R Bhatt, Juhi I Dholani
World Journal of Dentistry.2024; 15(7): 579. CrossRef
Nickel ion release and surface analyses on instrument fragments fractured beyond the apex: a laboratory investigation
Sıdıka Mine Toker, Ekim Onur Orhan, Arzu Beklen
BMC Oral Health.2023;[Epub] CrossRef

462 View
17 Download
1 Web of Science
4 Crossref

Fracture incidence of Reciproc instruments during root canal retreatment performed by postgraduate students: a cross-sectional retrospective clinical study: Liliana Machado Ruivo, Marcos de Azevedo Rios, Alexandre Mascarenhas Villela, Alexandre Sigrist de Martin, Augusto Shoji Kato, Rina Andrea Pelegrine, Ana Flávia Almeida Barbosa, Emmanuel João Nogueira Leal Silva, Carlos Eduardo da Silveira Bueno; Restor Dent Endod 2021;46(4):e49. Published online September 9, 2021; DOI: https://doi.org/10.5395/rde.2021.46.e49

Abstract PDF PubReader ePub

Objectives

To evaluate the fracture incidence of Reciproc R25 instruments (VDW) used during non-surgical root canal retreatments performed by students in a postgraduate endodontic program.

Materials and Methods

From the analysis of clinical record cards and periapical radiographs of root canal retreatments performed by postgraduate students using the Reciproc R25, a total of 1,016 teeth (2,544 root canals) were selected. The instruments were discarded after a single use. The general incidence of instrument fractures and its frequency was analyzed considering the group of teeth and the root thirds where the fractures occurred. Statistical analysis was performed using the χ² test (p < 0.01).

Results

Seven instruments were separated during the procedures. The percentage of fracture in relation to the number of instrumented canals was 0.27% and 0.68% in relation to the number of instrumented teeth. Four fractures occurred in maxillary molars, 1 in a mandibular molar, 1 in a mandibular premolar and 1 in a maxillary incisor. A greater number of fractures was observed in molars when compared with the number of fractures observed in the other dental groups (p < 0.01). Considering all of the instrument fractures, 71.43% were located in the apical third and 28.57% in the middle third (p < 0.01). One instrument fragment was removed, one bypassed, while in 5 cases, the instrument fragment remained inside the root canal.

Conclusions

The use of Reciproc R25 instruments in root canal retreatments carried out by postgraduate students was associated with a low incidence of fractures.

Citations

Citations to this article as recorded by

Reciprocating Torsional Fatigue and Mechanical Tests of Thermal-Treated Nickel Titanium Instruments
Victor Talarico Leal Vieira, Alejandro Jaime, Carlos Garcia Puente, Giuliana Soimu, Emmanuel João Nogueira Leal Silva, Carlos Nelson Elias, Gustavo de Deus
Journal of Endodontics.2025; 51(3): 359. CrossRef
Neodymium-Doped Yttrium Aluminum Perovskite (Nd:YAP) Laser in the Elimination of Endodontic Nickel-Titanium Files Fractured in Rooted Canals (Part 2: Teeth With Significant Root Curvature)
Amaury Namour, Marwan El Mobadder, Clément Cerfontaine, Patrick Matamba, Lucia Misoaga, Delphine Magnin , Praveen Arany, Samir Nammour
Cureus.2025;[Epub] CrossRef
Temperature-Dependent Effects on Cyclic Fatigue Resistance in Three Reciprocating Endodontic Systems: An In Vitro Study
Marcela Salamanca Ramos, José Aranguren, Giulia Malvicini, Cesar De Gregorio, Carmen Bonilla, Alejandro R. Perez
Materials.2025; 18(5): 952. CrossRef
Multimethod analysis of large‐ and low‐tapered single file reciprocating instruments: Design, metallurgy, mechanical performance, and irrigation flow
Emmanuel João Nogueira Leal Silva, Fernando Peña‐Bengoa, Natasha C. Ajuz, Victor T. L. Vieira, Jorge N. R. Martins, Duarte Marques, Ricardo Pinto, Mario Rito Pereira, Francisco Manuel Braz‐Fernandes, Marco A. Versiani
International Endodontic Journal.2024; 57(5): 601. CrossRef
Nd: YAP Laser in the Elimination of Endodontic Nickel-Titanium Files Fractured in Rooted Canals (Part 1: Teeth With Minimal Root Curvature)
Amaury Namour, Marwan El Mobadder, Patrick Matamba, Lucia Misoaga, Delphine Magnin , Praveen Arany, Samir Nammour
Cureus.2024;[Epub] CrossRef
Cyclic Fatigue of Different Reciprocating Endodontic Instruments Using Matching Artificial Root Canals at Body Temperature In Vitro
Sebastian Bürklein, Paul Maßmann, Edgar Schäfer, David Donnermeyer
Materials.2024; 17(4): 827. CrossRef
Endodontic Orthograde Retreatments: Challenges and Solutions
Alessio Zanza, Rodolfo Reda, Luca Testarelli
Clinical, Cosmetic and Investigational Dentistry.2023; Volume 15: 245. CrossRef
Design, metallurgy, mechanical properties, and shaping ability of 3 heat-treated reciprocating systems: a multimethod investigation
Emmanuel J. N. L. Silva, Jorge N. R. Martins, Natasha C. Ajuz, Henrique dos Santos Antunes, Victor Talarico Leal Vieira, Francisco Manuel Braz-Fernandes, Felipe Gonçalves Belladonna, Marco Aurélio Versiani
Clinical Oral Investigations.2023; 27(5): 2427. CrossRef
Noncontact 3D evaluation of surface topography of reciprocating instruments after retreatment procedures
Miriam Fatima Zaccaro-Scelza, Renato Lenoir Cardoso Henrique Martinez, Sandro Oliveira Tavares, Fabiano Palmeira Gonçalves, Marcelo Montagnana, Emmanuel João Nogueira Leal da Silva, Pantaleo Scelza
Brazilian Dental Journal.2022; 33(3): 38. CrossRef

322 View
6 Download
6 Web of Science
9 Crossref

Influence of glide path size and operating kinetics on time to reach working length and fracture resistance of Twisted File adaptive and Endostar E3 nickel-titanium file systems: Tamilkumaran Ramyadharshini, Inbaraj Anand Sherwood, V Shanmugham Vigneshwar, Prakasam Ernest Prince, Murugadoss Vaanjay; Restor Dent Endod 2020;45(2):e22. Published online March 5, 2020; DOI: https://doi.org/10.5395/rde.2020.45.e22

Abstract PDF PubReader ePub

Objectives

This study investigated the influence of glide path size and operating kinetics on the time to reach the working length and the fracture resistance of Twisted File (TF) and Endostar E3 files.

Materials and Methods

A total of 120 mandibular single-rooted premolars were selected. Two methods of kinetic motion (TF adaptive and continuous rotary motion) and file systems (TF and Endostar E3) were employed. The files were used in root canals prepared to apical glide path sizes of 15, 20, and 25. The time taken to reach the working length and the number of canals used before the instrument deformed or fractured were noted. Fractured instruments were examined with scanning electron microscopy.

Results

The TF system took significantly more time to reach the working length than the Endostar E3 system. Both systems required significantly more time to reach the working length at the size 15 glide path than at sizes 20 and 25. A greater number of TFs than Endostar E3 files exhibited deformation, and a higher incidence of instrument deformation was observed in adaptive than in continuous rotary motion; more deformation was also observed with the size 15 glide path. One TF was fractured while undergoing adaptive motion.

Conclusions

No significant difference was observed between continuous rotary and adaptive motion. The TF system and adaptive motion were associated with a higher incidence of deformation and fracture. Apical glide path sizes of 20 and 25 required significantly less time to reach the working length than size 15.

Citations

Citations to this article as recorded by

Glide Path in Endodontics: A Literature Review of Current Knowledge
Vlad Mircea Lup, Giulia Malvicini, Carlo Gaeta, Simone Grandini, Gabriela Ciavoi
Dentistry Journal.2024; 12(8): 257. CrossRef
Assessment of Different File Systems for Working Time Based on Glide Path, Operating Kinetics, and the Fracture Resistance
Ruchika Gupta, Divya Batra, Debkant Jena, Nandita Bansal, Alka Arora, Divya Gaurav Dudulwar
The Journal of Contemporary Dental Practice.2021; 22(1): 69. CrossRef

214 View
2 Download
2 Crossref

Cyclic fatigue, bending resistance, and surface roughness of ProTaper Gold and EdgeEvolve files in canals with single- and double-curvature: Wafaa A. Khalil, Zuhair S. Natto; Restor Dent Endod 2019;44(2):e19. Published online April 26, 2019; DOI: https://doi.org/10.5395/rde.2019.44.e19

Abstract PDF PubReader ePub

Objectives

The purpose of this study was to evaluate the cyclic fatigue, bending resistance, and surface roughness of EdgeEvolve (EdgeEndo) and ProTaper Gold (Dentsply Tulsa Dental Specialties) nickel-titanium (NiTi) rotary files.

Materials and Methods

The instruments (n = 15/each) were tested for cyclic fatigue in single- (60° curvature, 5-mm radius) and double-curved (coronal curvature 60°, 5-mm radius, and apical curvature of 30° and 2-mm radius) artificial canals. The number of cycles to fracture was calculated. The bending resistance of both files were tested using a universal testing machine where the files were bent until reach 45°. Scanning electron microscopy and x-ray energy-dispersive spectrometric analysis were used for imaging the fractured segments, while the atomic force microscope was used to quantify the surface roughness average (Ra).

Results

EdgeEvolve files exhibited higher cyclic fatigue resistance than ProTaper Gold files in single- and double-curved canals (p < 0.05) and both files were more resistant to cyclic fatigue in single-curved canals than double-curved canals (p < 0.05). EdgeEvolve files exhibited significantly more flexibility than did ProTaper Gold files (p < 0.05). Both files had approximately similar Ni and Ti contents (p > 0.05). EdgeEvolve files showed significantly lower Ra values than ProTaper Gold files (p < 0.05).

Conclusions

Within the limitation of this study, EdgeEvolve files exhibited significantly higher cyclic fatigue resistance than ProTaper Gold files in both single- and double-curved canals.

Citations

Citations to this article as recorded by

An in vitro comparison of alterations in surface topographies of three different rotary files after root canal preparation with different irrigating solutions: Atomic force microscopic study
PremSai Parepalli, TB. V G. Raju, PKrishna Prasad, GowtamDev Dondapati, VenkataSrija Kintada, Alekhya Mediboyina
Journal of Conservative Dentistry.2023; 26(3): 299. CrossRef
Assessment of surface topographic changes of nickel–titanium rotary endodontic file at repeated usage: An in vitro study
E. Viswas, VSS Krishna, E. Sridevi, A. J. Sai Sankar, K. Siva Sankar, B. Nagesh
Endodontology.2023; 35(2): 149. CrossRef
Cyclic Fatigue Resistance and Surface Roughness of Rotary NiTi Instruments after Simulated Clinical Use in Curved Root Canals – An Atomic Force Microscopy Study
Raksha Bhat, Arjun Kini, Preethesh Shetty, Payalben Kansara, Bapanaiah Penugonda
Pesquisa Brasileira em Odontopediatria e Clínica Integrada.2022;[Epub] CrossRef
Metallurgical Tests in Endodontics: A Narrative Review
Alessio Zanza, Marco Seracchiani, Rodolfo Reda, Gabriele Miccoli, Luca Testarelli, Dario Di Nardo
Bioengineering.2022; 9(1): 30. CrossRef
Influence of nickel-titanium rotary systems with varying cross-sectional, pitch, and rotational speed on deflection and cyclic fatigue: a finite element analysis study
Wignyo Hadriyanto, Lukita Wardani, Christina Nugrohowati, Ananto Alhasyimi, Rachmat Sriwijaya, Margareta Rinastiti, Widowati Siswomihardjo, Gunadi, T. Yamada, A.A.C. Pramana, Y. Ophinni, A. Gusnanto, W.A. Kusuma, J. Yunus, Afiahayati, R. Dharmastiti, T.
BIO Web of Conferences.2021; 41: 05005. CrossRef
Can the Separated Instrument be Removed From the Root Canal System out by Magnetism? A Hypothesis
Mohammad Daryaeian, Sanjay Miglani, AbdolMahmood Davarpanah, Hyeon-Cheol Kim, Mohsen Ramazani
Dental Hypotheses.2019; 10(4): 108. CrossRef
Resistance to cyclic fatigue of reciprocating instruments determined at body temperature and phase transformation analysis
Raymond Scott, Ana Arias, José C. Macorra, Sanjay Govindjee, Ove A. Peters
Australian Endodontic Journal.2019; 45(3): 400. CrossRef

211 View
4 Download
7 Crossref

The top 10 most-cited articles on the management of fractured instruments: a bibliometric analysis: Lora Mishra, Hyeon-Cheol Kim, Naomi Ranjan Singh, Priti Pragati Rath; Restor Dent Endod 2019;44(1):e2. Published online December 26, 2018; DOI: https://doi.org/10.5395/rde.2019.44.e2

Abstract PDF PubReader ePub

Objectives

The purpose of this research was to identify the top 10 most-cited articles on the management of fractured or broken instruments and to perform a bibliometric analysis thereof.

Materials and Methods

Published articles related to fractured instruments were screened from online databases, such as Web of Science, Scopus, PubMed, and ScienceDirect, and highly cited papers, with at least 50 citations since publication, were identified. The most-cited articles were selected and analysed with regard to publication title, authorship, the journal of publication, year, institution, country of origin, article type, and number of citations.

Results

The top 10 most-cited articles were from various journals. Most were published in the Journal of Endodontics, followed by the International Endodontic Journal, and Dental Traumatology. The leading countries were Australia, Israel, Switzerland, the USA, and Germany, and the leading institution was the University of Melbourne. The majority of articles among the top 10 articles were clinical research studies (n = 8), followed by a basic research article and a non-systematic review article.

Conclusions

This bibliometric analysis revealed interesting information about scientific progress in endodontics regarding fractured instruments. Overall, clinical research studies and basic research articles published in high-impact endodontic journals had the highest citation rates.

Citations

Citations to this article as recorded by

A Bibliometric Analysis of the 100 Top-Cited Articles on Vertical Root Fractures
Pillai Arun Gopinathan , Ikram UI Haq, Nawaf Alfahad, Saleh Alwatban, Abdullah Alghamdi, Amal Alamri, Kiran Iyer
Cureus.2024;[Epub] CrossRef
Predictive factors in the retrieval of endodontic instruments: the relationship between the fragment length and location
Ricardo Portigliatti, Eugenia Pilar Consoli Lizzi, Pablo Alejandro Rodríguez
Restorative Dentistry & Endodontics.2024;[Epub] CrossRef
A bibliometric analysis of the top 100 most‐cited case reports and case series in Endodontic journals
Venkateshbabu Nagendrababu, Jelena Jacimovic, Aleksandar Jakovljevic, Giampiero Rossi‐Fedele, Paul M. H. Dummer
International Endodontic Journal.2022; 55(3): 185. CrossRef
The Most Highly Cited Publications on Basketball Originate From English-Speaking Countries, Are Published After 2000, Are Focused on Medicine-Related Topics, and Are Level III Evidence
Zachary D. Griffin, Jordan R. Pollock, M. Lane Moore, Kade S. McQuivey, Jaymeson R. Arthur, Anikar Chhabra
Arthroscopy, Sports Medicine, and Rehabilitation.2022; 4(3): e891. CrossRef
Ten years of minimally invasive access cavities in Endodontics: a bibliometric analysis of the 25 most-cited studies
Emmanuel João Nogueira Leal Silva, Karem Paula Pinto, Natasha C. Ajuz, Luciana Moura Sassone
Restorative Dentistry & Endodontics.2021;[Epub] CrossRef
Publication trends in micro‐CT endodontic research: a bibliometric analysis over a 25‐year period
U. Aksoy, M. Küçük, M. A. Versiani, K. Orhan
International Endodontic Journal.2021; 54(3): 343. CrossRef

208 View
4 Download
6 Crossref

Comparison of the shaping ability of novel thermally treated reciprocating instruments: Cangül Keskin, Murat Demiral, Evren Sarıyılmaz; Restor Dent Endod 2018;43(2):e15. Published online March 3, 2018; DOI: https://doi.org/10.5395/rde.2018.43.e15

Abstract PDF PubReader ePub

Objectives

The present study aimed to evaluate the shaping ability of 2 thermally treated nickel-titanium reciprocating systems in simulated curved canals.

Materials and Methods

Forty simulated canals were prepared to apical size 25 using Reciproc Blue R25 (VDW) and WaveOne Gold Primary (Dentsply Sirona) instruments. Standard pre- and post-preparation images were taken and superimposed. The removal of resin material was measured at 5 standard points: the canal orifice, halfway between the canal orifice and the beginning of the curve, the beginning of the curve, the apex of the curve, and the end-point of the simulated canal. The data were analysed using the independent sample t-test with a 5% significance threshold.

Results

The canals in which Reciproc Blue R25 was used showed a significantly greater widening than those in which WaveOne Gold was used at 4 of the 5 measurement points (p < 0.05). The Reciproc Blue R25 instrument removed significantly more resin from the inner aspect of the curve at 2 of the 5 points and similar amounts at the remaining 3 points. At the 2 apical points, there was no significant difference between the Reciproc Blue R25 and WaveOne Gold Primary instruments.

Conclusion

Both instruments respected the original canal anatomy; however, WaveOne Gold resulted in a more conservative shape with less transportation.

Citations

Citations to this article as recorded by

Shaping Ability of the Root Canal System Using Reciproc and Reciproc Blue in Preparation of Artificial Canals
Hawazin Majdi, Khalid Merdad, Tariq Abuhaimed, Lujain Mirdad, Omar Alkhattab, Abdulaziz Bakhsh
Pesquisa Brasileira em Odontopediatria e Clínica Integrada.2025;[Epub] CrossRef
Comparison of four different file systems in terms of transportation in S-shaped canals and apically extruded debris
Mustafa Alrahhal, Fatma Tunç
Journal of Oral Science.2024; 66(4): 226. CrossRef
Assessment of Debris Extrusion in Curved Canals: An In Vitro Analysis of Various Single‐File Endodontic Instrumentation Systems
Muhammad Zubair Ahmad, Boonlert Kukiattrakoon
International Journal of Dentistry.2024;[Epub] CrossRef
Shaping ability of rotary and reciprocating single-file systems in combination with and without different glide path techniques in simulated curved canals
Lu Shi, Yunfei Yang, Jie Wan, Wen Xie, Ruiming Yang, Ying Yao
Journal of Dental Sciences.2022; 17(4): 1520. CrossRef
An Investigation of the Accuracy and Reproducibility of 3D Printed Transparent Endodontic Blocks
Martin Smutný, Martin Kopeček, Aleš Bezrouk
Acta Medica (Hradec Kralove, Czech Republic).2022; 65(2): 59. CrossRef
Shaping Ability of Reciprocating Single-file Systems in Simulated Canals: Reciproc versus Reciproc Blue
İrem ÇETİNKAYA, Mukadder İnci BAŞER KOLCU
SDÜ Tıp Fakültesi Dergisi.2021; 28(1): 145. CrossRef
Combination of a new ultrasonic tip with rotary systems for the preparation of flattened root canals
Karina Ines Medina Carita Tavares, Jáder Camilo Pinto, Airton Oliveira Santos-Junior, Fernanda Ferrari Esteves Torres, Juliane Maria Guerreiro-Tanomaru, Mario Tanomaru-Filho
Restorative Dentistry & Endodontics.2021;[Epub] CrossRef
Apical extrusion of debris with different rotary and reciprocating single-file endodontic instrumentation systems: a systematic review and meta-analysis protocol
Muhammad Zubair Ahmad, Durre Sadaf, Marcy McCall MacBain, Ahmed Nabil Mohamed
BMJ Open.2020; 10(9): e038502. CrossRef
Micro-computed tomographic assessment of the shaping ability of the One Curve, One Shape, and ProTaper Next nickel-titanium rotary systems
Pelin Tufenkci, Kaan Orhan, Berkan Celikten, Burak Bilecenoglu, Gurkan Gur, Semra Sevimay
Restorative Dentistry & Endodontics.2020;[Epub] CrossRef
Changes in Geometry and Transportation of Root Canals with Severe Curvature Prepared by Different Heat-treated Nickel-titanium Instruments: A Micro–computed Tomographic Study
Daniel José Filizola de Oliveira, Graziela Bianchi Leoni, Rafael da Silva Goulart, Manoel Damião de Sousa-Neto, Yara Teresinha Correa Silva Sousa, Ricardo Gariba Silva
Journal of Endodontics.2019; 45(6): 768. CrossRef
Several factors can affect the root canal transportation of MB2 canals in extracted maxillary first molars
R. R. Vivan, M. P. Alcalde, E. J de Camargo, V. A. S. Marques, M. V. R. Só, J. A. Duque, M. A. H. Duarte
International Endodontic Journal.2019; 52(4): 551. CrossRef
Effect of larger apical size on the quality of preparation in curved canals using reciprocating instruments with different heat thermal treatments
J. A. Duque, R. R. Vivan, M. A. H. Duarte, M. P. Alcalde, V. M. Cruz, M. M. B. Borges, C. M. Bramante
International Endodontic Journal.2019; 52(11): 1652. CrossRef

222 View
1 Download
12 Crossref

The effect of root canal preparation on the surface roughness of WaveOne and WaveOne Gold files: atomic force microscopy study: Taha Özyürek, Koray Yılmaz, Gülşah Uslu, Gianluca Plotino; Restor Dent Endod 2018;43(1):e10. Published online February 2, 2018; DOI: https://doi.org/10.5395/rde.2018.43.e10

Abstract PDF PubReader ePub

Objectives

To examine the surface topography of intact WaveOne (WO; Dentsply Sirona Endodontics) and WaveOne Gold (WOG; Dentsply Sirona Endodontics) nickel-titanium rotary files and to evaluate the presence of alterations to the surface topography after root canal preparations of severely curved root canals in molar teeth.

Materials and Methods

Forty-eight severely curved canals of extracted molar teeth were divided into 2 groups (n = 24/each group). In group 1, the canals were prepared using WO and in group 2, the canals were prepared using WOG files. After the preparation of 3 root canals, instruments were subjected to atomic force microscopy analysis. Average roughness and root mean square values were chosen to investigate the surface features of endodontic files. The data was analyzed using one-way analysis of variance and post hoc Tamhane's tests at 5% significant level.

Results

The surface roughness values of WO and WOG files significantly changed after use in root canals (p < 0.05). The used WOG files exhibited higher surface roughness change when compared with the used WO files (p < 0.05).

Conclusions

Using WO and WOG Primary files in 3 root canals affected the surface topography of the files. After being used in root canals, the WOG files showed a higher level of surface porosity value than the WO files.

Citations

Citations to this article as recorded by

Comparative Analysis of Surface Roughness and Plastic Deformation of Reciprocating Instruments after Clinical Use
Ángel Herrera, Magdalena Azabal, Jesús R. Jimenez-Octavio, Juan C. del Real-Romero, Sara López de Armentia, Juan M. Asensio-Gil, Ana Arias
Materials.2024; 17(16): 3978. CrossRef
Comparative Evaluation of Surface Roughness of Different Rotary Nickel-Titanium (NiTi) Files After Autoclaving: An Atomic Force Microscopic Study
Angela Alex, Ranjith Kumar Sivarajan, Vijay Venkatesh
Cureus.2024;[Epub] CrossRef
Impact of endodontic irrigants on surface roughness of various nickel-titanium rotary endodontic instruments
Tamer M. Hamdy, Yasmine Mohsen Alkabani, Amira Galal Ismail, Manar M. Galal
BMC Oral Health.2023;[Epub] CrossRef
Metallurgical Tests in Endodontics: A Narrative Review
Alessio Zanza, Marco Seracchiani, Rodolfo Reda, Gabriele Miccoli, Luca Testarelli, Dario Di Nardo
Bioengineering.2022; 9(1): 30. CrossRef
Cyclic Fatigue Resistance and Surface Roughness of Rotary NiTi Instruments after Simulated Clinical Use in Curved Root Canals – An Atomic Force Microscopy Study
Raksha Bhat, Arjun Kini, Preethesh Shetty, Payalben Kansara, Bapanaiah Penugonda
Pesquisa Brasileira em Odontopediatria e Clínica Integrada.2022;[Epub] CrossRef
In Vitro Study of Irrigation solution of Chitosan Nanoparticles to Inhibit the Adhesion and Biofilm Formation of Enterococcus faecalis in the Root Canal
Imelda Darmawi, Trimurni Abidin, Harry Agusnar, Basri A. Gani
Research Journal of Pharmacy and Technology.2022; : 2691. CrossRef
Alteration in surface roughness of reciprocating endodontic instruments
Khoa Van Pham
F1000Research.2021; 10: 875. CrossRef
Surface profile of different heat-treated nickel-titanium files before and after root canal preparation
Iandara de Lima Scardini, Denise Maria Zezell, Juliana Lisboa Couto Marques, Laila Gonzales Freire, Marcelo dos Santos
Brazilian Dental Journal.2021; 32(6): 8. CrossRef
Impact of Endodontic Instrumentation on Surface Roughness of Various Nickel-Titanium Rotary Files
Muhammad Sohail Zafar
European Journal of Dentistry.2021; 15(02): 273. CrossRef
A new method for assessment of nickel-titanium endodontic instrument surface roughness using field emission scanning electronic microscope
Khoa Van Pham, Canh Quang Vo
BMC Oral Health.2020;[Epub] CrossRef
Surface Alterations Induced on Endodontic Instruments by Sterilization Processes, Analyzed with Atomic Force Microscopy: A Systematic Review
Mario Dioguardi, Vito Crincoli, Luigi Laino, Mario Alovisi, Enrica Laneve, Diego Sovereto, Bruna Raddato, Khrystyna Zhurakivska, Filiberto Mastrangelo, Domenico Ciavarella, Lucio Lo Russo, Lorenzo Lo Muzio
Applied Sciences.2019; 9(22): 4948. CrossRef
Atomic force microscopy and energy dispersive X‐ray spectrophotometry analysis of reciprocating and continuous rotary nickel‐titanium instruments following root canal retreatment
Bulem Üreyen Kaya, Cevat Emre Erik, Gülsen Kiraz
Microscopy Research and Technique.2019; 82(7): 1157. CrossRef
Influence of heat treatment on torsional resistance and surface roughness of nickel‐titanium instruments
E. J. N. L. Silva, J. F. N. Giraldes, C. O. de Lima, V. T. L. Vieira, C. N. Elias, H. S. Antunes
International Endodontic Journal.2019; 52(11): 1645. CrossRef

230 View
4 Download
13 Crossref

Incidence of apical crack formation and propagation during removal of root canal filling materials with different engine driven nickel-titanium instruments: Taha Özyürek, Vildan Tek, Koray Yılmaz, Gülşah Uslu; Restor Dent Endod 2017;42(4):332-341. Published online November 4, 2017; DOI: https://doi.org/10.5395/rde.2017.42.4.332

Abstract PDF PubReader ePub

Objectives

To determine the incidence of crack formation and propagation in apical root dentin after retreatment procedures performed using ProTaper Universal Retreatment (PTR), Mtwo-R, ProTaper Next (PTN), and Twisted File Adaptive (TFA) systems.

Materials and Methods

The study consisted of 120 extracted mandibular premolars. One millimeter from the apex of each tooth was ground perpendicular to the long axis of the tooth, and the apical surface was polished. Twenty teeth served as the negative control group. One hundred teeth were prepared, obturated, and then divided into 5 retreatment groups. The retreatment procedures were performed using the following files: PTR, Mtwo-R, PTN, TFA, and hand files. After filling material removal, apical enlargement was done using apical size 0.50 mm ProTaper Universal (PTU), Mtwo, PTN, TFA, and hand files. Digital images of the apical root surfaces were recorded before preparation, after preparation, after obturation, after filling removal, and after apical enlargement using a stereomicroscope. The images were then inspected for the presence of new apical cracks and crack propagation. Data were analyzed with χ² tests using SPSS 21.0 software.

Results

New cracks and crack propagation occurred in all the experimental groups during the retreatment process. Nickel-titanium rotary file systems caused significantly more apical crack formation and propagation than the hand files. The PTU system caused significantly more apical cracks than the other groups after the apical enlargement stage.

Conclusions

This study showed that retreatment procedures and apical enlargement after the use of retreatment files can cause crack formation and propagation in apical dentin.

Citations

Citations to this article as recorded by

Microcracks induced by XP-endo retreatment system in root canals filled with bioceramic sealer: A micro-computed tomographic analysis
Sarah M. Alkahtany
The Saudi Dental Journal.2025;[Epub] CrossRef
Efficacy of Various Heat-treated Retreatment File Systems on Dentin Removal and Crack Analysis: An in vitro Study
Swathi Suresh, Pradeep Solete, Delphine Priscilla Antony, Kavalipurapu Venkata Teja, Adimulapu Hima Sandeep, Sruthi Sairaman, Marco Cicciù, Giuseppe Minervini
Pesquisa Brasileira em Odontopediatria e Clínica Integrada.2024;[Epub] CrossRef
A comparative evaluation of the dentinal microcracks formed and propagated during the removal of gutta-percha using hand and three rotary retreatment file systems: A micro-computed tomography study
Srivastava Sanjeev, Rita Gupta, Dubey Sandeep, Tewari Tanu, Shukla Namita, Singh Arohan
Endodontology.2023; 35(2): 155. CrossRef
Comparative evaluation of incidence of dentinal defects after root canal preparation using hand, rotary, and reciprocating files: An ex vivo study
Debanjan Das, Sudipto Barai, Rohit Kumar, Sourav Bhattacharyya, AsimB Maity, Pushpa Shankarappa
Journal of International Oral Health.2022; 14(1): 78. CrossRef
Critical analysis of research methods and experimental models to study removal of root filling materials
Mahdi A. Ajina, Pratik K. Shah, Bun San Chong
International Endodontic Journal.2022; 55(S1): 119. CrossRef
Evaluation of Dentinal Crack Propagation, Amount of Gutta Percha Remaining and Time Required During Removal of Gutta Percha Using Two Different Rotary Instruments and Hand Instruments - An In vitro Study
S Tejaswi, A Singh, S Manglekar, UK Ambikathanaya, S Shetty
Nigerian Journal of Clinical Practice.2022; 25(4): 524. CrossRef
The Influence of Root Canal Preparation with ProTaper Next, WaveOne Gold, and Twisted Files on Dentine Crack Formation
Wojciech Eliasz, Beata Czarnecka, Anna Surdacka
Machines.2021; 9(12): 332. CrossRef
The potential effect of instrumentation with different nickel titanium rotary systems on dentinal crack formation—An in vitro study
Márk Fráter, András Jakab, Gábor Braunitzer, Zsolt Tóth, Katalin Nagy, Andrej M. Kielbassa
PLOS ONE.2020; 15(9): e0238790. CrossRef
Micro–computed Tomographic Assessment of the Residual Filling Volume, Apical Transportation, and Crack Formation after Retreatment with Reciproc and Reciproc Blue Systems in Curved Root Canals
Damla Kırıcı, Sezer Demirbuga, Ertuğrul Karataş
Journal of Endodontics.2020; 46(2): 238. CrossRef
Force and vibration generated in apical direction by three endodontic files of different kinematics during simulated canal preparation: An in vitro analytical study
Ankit Nayak, PK Kankar, Prashant K Jain, Niharika Jain
Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine.2019; 233(8): 839. CrossRef
Effect of Aging on Dentinal Crack Formation after Treatment and Retreatment Procedures: a Micro-CT Study
Lilian Rachel de Lima Aboud, Bernardo Camargo dos Santos, Ricardo Tadeu Lopes, Leonardo Aboud Costa Viana, Miriam Fátima Zaccaro Scelza
Brazilian Dental Journal.2018; 29(6): 530. CrossRef

369 View
2 Download
11 Crossref

The effects of autoclave sterilization on the cyclic fatigue resistance of ProTaper Universal, ProTaper Next, and ProTaper Gold nickel-titanium instruments: Taha Özyürek, Koray Yılmaz, Gülşah Uslu; Restor Dent Endod 2017;42(4):301-308. Published online November 2, 2017; DOI: https://doi.org/10.5395/rde.2017.42.4.301

Abstract PDF PubReader ePub

Objectives

It was aimed to compare the cyclic fatigue resistances of ProTaper Universal (PTU), ProTaper Next (PTN), and ProTaper Gold (PTG) and the effects of sterilization by autoclave on the cyclic fatigue life of nickel-titanium (NiTi) instruments.

Materials and Methods

Eighty PTU, 80 PTN, and 80 PTG were included to the present study. Files were tested in a simulated canal. Each brand of the NiTi files were divided into 4 subgroups: group 1, as received condition; group 2, pre-sterilized instruments exposed to 10 times sterilization by autoclave; group 3, instruments tested were sterilized after being exposed to 25%, 50%, and 75% of the mean cycles to failure, then cycled fatigue test was performed; group 4, instruments exposed to the same experiment with group 3 without sterilization. The number of cycles to failure (NCF) was calculated. The data was statistically analyzed by using one-way analysis of variance and post hoc Tukey tests.

Results

PTG showed significantly higher NCF than PTU and PTN in group 1 (p < 0.05). Sterilization significantly increased the NCF of PTN and PTG (p < 0.05) in group 2. PTN in group 3 had significantly higher cyclic fatigue resistance than PTN group 4 (p < 0.05). Also, significantly higher NCF was observed for PTG in group 2 than in groups 3 and 4 (p < 0.05).

Conclusions

PTG instrument made of new gold alloy was more resistant to fatigue failure than PTN and PTU. Autoclaving increased the cyclic fatigue resistances of PTN and PTG.

Citations

Citations to this article as recorded by

The influence of autoclave sterilization on the cyclic fatigue of M-wire rotary endodontic instruments
Nenad Stosic, Jelena Popovic, Antonije Stankovic, Aleksandar Mitic, Marija Nikolic, Kosta Todorovic
Vojnosanitetski pregled.2024; 81(10): 642. CrossRef
Evaluatation of two nickle-titanium systems’ (Neolix and X Pro Gold) resistance to fracture after immersion in sodium hypochlorite.
Solmaz Araghi, Abbas Delvarani, Faeze dehghan, Parisa Kaghazloo
journal of research in dental sciences.2024; 21(1): 17. CrossRef
Comparing the EdgeFile X3, GenEndo, HeroGold, and ProTaper Gold Rotary Instruments Regarding the Effect of Different Concentrations and Temperature of NaOCl on Cyclic Fatigue Resistance
Garima Tyagi, Parul Shakarwal, Prakash Kumar, Annu Kumari, Aditya Singh, Pallavi Kusum
The Journal of Contemporary Dental Practice.2023; 24(9): 715. CrossRef
Cyclic fatigue resistance of EdgeTaper Platinum, Protaper Gold, and TruNatomy Prime rotary files before and after autoclave sterilization
Rahaf A. Almohareb, Reem M. Barakat, Fahda N. Algahtani, Manal F. Alkadi
PeerJ.2023; 11: e14656. CrossRef
Comparison of the fracture resistance of the teeth prepared with ProTaper Universal, ProTaper Next, and ProTaper Gold rotary files
Amin Salem Milani, Shabnam Ganjpour, Fatemeh Dehghani, Saeed Rahimi, Pouya Sabanik
Clinical and Experimental Dental Research.2022; 8(6): 1421. CrossRef
Impacts of NaOCl and Irritrol irrigation solutions with/without autoclave sterilisation on the cyclic fatigue resistance of different nickel‐titanium files
Fatma Kermeoglu, Mohamad Abduljalil
Australian Endodontic Journal.2022; 48(3): 392. CrossRef
Fracture Resistance of Heat-Treated Nickel-Titanium Rotary Files After Usage and Autoclave Sterilization: An In Vitro Study
Rashid El Abed, Aisha Alshehhi, Yoo Jung Kang, Dana Al Raeesi, Amar H. Khamis, Mohamed Jamal, Hyeon-Cheol Kim
Journal of Endodontics.2022; 48(11): 1428. CrossRef
Nitinol Type Alloys General Characteristics and Applications in Endodontics
Leszek A. Dobrzański, Lech B. Dobrzański, Anna D. Dobrzańska-Danikiewicz, Joanna Dobrzańska
Processes.2022; 10(1): 101. CrossRef
The Impact of Multiple Autoclave Cycles on the Surface Roughness of Thermally Treated Nickel-Titanium Endodontic Files
Raidan Ba-Hattab, Rahaf A. Almohareb, Rana Alkhalaf, Shikhah Binnjefan, Meral Sulayem, Reem M. Barakat, Ismail Demir
Advances in Materials Science and Engineering.2022; 2022: 1. CrossRef
Effect of autoclave sterilisation and heat activated sodium hypochlorite irrigation on the performance of nickel-titanium rotary files against cyclic fatigue
Zuha Ayad Jaber, Sattar Jabbar Abdul-Zahra Al-Hmedat, Sarmad Adel Hameed, Suhad Jabbar Hamed Al-Nasrawi, Abtesam Imhemed Aljdaimi, Julfikar Haider
Advances in Materials and Processing Technologies.2022; 8(1): 1071. CrossRef
Effect of different axial speed patterns on cyclic fatigue resistance of rotary nickel-titanium instruments
Myint Thu, Arata Ebihara, Keiichiro Maki, Miki Nishijo, Shunsuke Kimura, Taro Nakatsukasa, Moe Sandar Kyaw, Takashi Okiji
BMC Oral Health.2022;[Epub] CrossRef
Cyclic Fatigue Resistance and Shaping Ability of Heat-Treated Nickel-Titanium Instruments after Repeated Use
SG Kamali, D Turkaydin
Nigerian Journal of Clinical Practice.2021; 24(2): 247. CrossRef
Effects of repeated sterilization cycles on the surface alterations of ProTaper Next, TF Adaptive, HyFlex CM, and 2Shape instruments
Olcay Özdemir, Sibel Koçak, Mustafa Murat Koçak, Baran Can Sağlam
Journal of Dental Research, Dental Clinics, Dental Prospects.2021; 15(2): 76. CrossRef
Cleaning of endodontic files with and without enzymatic detergent by means of the manual method versus the ultrasonic method
César F Cayo-Rojas, Estefany Brito-Ávila, Ana S Aliaga-Mariñas, Karen K Hernández-Caba, Emylain D Saenz-Cazorla, Marysela I Ladera-Castañeda, Luis A Cervantes-Ganoza
Journal of International Society of Preventive and Community Dentistry.2021; 11(3): 307. CrossRef
Effect of number of uses and sterilization on the instrumented area and resistance of reciprocating instruments
Victor de Ornelas Peraça, Samantha Rodrigues Xavier, Fabio de Almeida Gomes, Luciane Geanini Pena dos Santos, Erick Miranda Souza, Fernanda Geraldo Pappen
Restorative Dentistry & Endodontics.2021;[Epub] CrossRef
Influence of sterilization procedures on the physical and mechanical properties of rotating endodontic instruments: a systematic review and network meta-analysis
Mario Dioguardi, Claudia Arena, Diego Sovereto, Riccardo Aiuto, Luigi Laino, Gaetano Illuzzi, Enrica Laneve, Bruna Raddato, Vito Carlo Alberto Caponio, Antonio Dioguardi, Khrystyna Zhurakivska, Giuseppe Troiano, Lorenzo Lo Muzio
Frontiers in Bioscience-Landmark.2021;[Epub] CrossRef
EFFECTS OF SODIUM HYPOCHLORIDE ON CYCLIC FATIGUE RESISTANCE OF BIORACE ROTARY INSTRUMENT WITH DIFFERENT TIP SIZES
Ayfer ATAV ATEŞ, Burçin ARICAN
Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi.2021; : 1. CrossRef
The Influence of NiTi Alloy on the Cyclic Fatigue Resistance of Endodontic Files
Celia Ruiz-Sánchez, Vicente Faus-Llácer, Ignacio Faus-Matoses, Álvaro Zubizarreta-Macho, Salvatore Sauro, Vicente Faus-Matoses
Journal of Clinical Medicine.2020; 9(11): 3755. CrossRef
Novel Electronic Device to Quantify the Cyclic Fatigue Resistance of Endodontic Reciprocating Files after Using and Sterilization
Álvaro Zubizarreta-Macho, Óscar Alonso-Ezpeleta, Alberto Albaladejo Martínez, Vicente Faus Matoses, Javier Caviedes Brucheli, Rubén Agustín-Panadero, Jesús Mena Álvarez, Fernando Vizmanos Martínez-Berganza
Applied Sciences.2020; 10(14): 4962. CrossRef
Influence of autoclave sterilization procedures on the cyclic fatigue resistance of heat-treated nickel-titanium instruments: a systematic review
Emmanuel João Nogueira Leal Silva, Mayara Zanon, Fernanda Hecksher, Felipe Gonçalves Belladonna, Rafaela Andrade de Vasconcelos, Tatiana Kelly da Silva Fidalgo
Restorative Dentistry & Endodontics.2020;[Epub] CrossRef
Management of Instrument Sterilization Workflow in Endodontics: A Systematic Review and Meta-Analysis
Mario Dioguardi, Diego Sovereto, Gaetano Illuzzi, Enrica Laneve, Bruna Raddato, Claudia Arena, Vito Carlo Alberto Caponio, Giorgia Apollonia Caloro, Khrystyna Zhurakivska, Giuseppe Troiano, Lorenzo Lo Muzio
International Journal of Dentistry.2020; 2020: 1. CrossRef
Effect of autoclave sterilization on cyclic fatigue and torsional fracture resistance of NiTi rotary instruments
Wooyoung Kim, Soram Oh, Gil-Joo Ryu, Tae-Hwan Kim, Sung-Jae Kim, Dong-Hyung Kim, Bin-Na Lee, Kee-Yeon Kum, Seok Woo Chang, Ji-Hyun Jang
Odontology.2020; 108(2): 194. CrossRef
Effects of Sodium Hypochlorite Concentration and Temperature on the Cyclic Fatigue Resistance of Heat-treated Nickel-titanium Rotary Instruments
Hussam Alfawaz, Abdullah Alqedairi, Hala Alsharekh, Eman Almuzaini, Shahd Alzahrani, Ahmed Jamleh
Journal of Endodontics.2018; 44(10): 1563. CrossRef
Cyclic Fatigue Resistance of Heat-treated Nickel-titanium Instruments after Immersion in Sodium Hypochlorite and/or Sterilization
Eugenio Pedullà, Angela Benites, Giusy M. La Rosa, Gianluca Plotino, Nicola M. Grande, Ernesto Rapisarda, Luigi Generali
Journal of Endodontics.2018; 44(4): 648. CrossRef

259 View
4 Download
24 Crossref

Comparison of apical extrusion of intracanal bacteria by various glide-path establishing systems: an in vitro study: Alberto Dagna, Rashid El Abed, Sameeha Hussain, Ibrahim H Abu-Tahun, Livia Visai, Federico Bertoglio, Floriana Bosco, Riccardo Beltrami, Claudio Poggio, Hyeon-Cheol Kim; Restor Dent Endod 2017;42(4):316-323. Published online October 31, 2017; DOI: https://doi.org/10.5395/rde.2017.42.4.316

Abstract PDF PubReader ePub

Objectives

This study compared the amount of apically extruded bacteria during the glide-path preparation by using multi-file and single-file glide-path establishing nickel-titanium (NiTi) rotary systems.

Materials and Methods

Sixty mandibular first molar teeth were used to prepare the test apparatus. They were decoronated, blocked into glass vials, sterilized in ethylene oxide gas, infected with a pure culture of Enterococcus faecalis, randomly assigned to 5 experimental groups, and then prepared using manual stainless-steel files (group KF) and glide-path establishing NiTi rotary files (group PF with PathFiles, group GF with G-Files, group PG with ProGlider, and group OG with One G). At the end of canal preparation, 0.01 mL NaCl solution was taken from the experimental vials. The suspension was plated on brain heart infusion agar and colonies of bacteria were counted, and the results were given as number of colony-forming units (CFU).

Results

The manual instrumentation technique tested in group KF extruded the highest number of bacteria compared to the other 4 groups (p < 0.05). The 4 groups using rotary glide-path establishing instruments extruded similar amounts of bacteria.

Conclusions

All glide-path establishment instrument systems tested caused a measurable apical extrusion of bacteria. The manual glide-path preparation showed the highest number of bacteria extruded compared to the other NiTi glide-path establishing instruments.

Citations

Citations to this article as recorded by

Glide Path in Endodontics: A Literature Review of Current Knowledge
Vlad Mircea Lup, Giulia Malvicini, Carlo Gaeta, Simone Grandini, Gabriela Ciavoi
Dentistry Journal.2024; 12(8): 257. CrossRef
Evaluation of apically extruded debris using protaper universal, protaper next, one curve, Xp shaper, and edge file: An in vitro study
Murtada Qadir Muhaibes, Shatha Abdulkareem Alwakeel
Saudi Endodontic Journal.2024; 14(1): 31. CrossRef
Effect of Multiple Glide Path Files on Apical Debris Extrusion in Severely Curved Mesial Roots of Mandibular Molars: An In Vitro Study
Niranjan Desai, Ashish S Bhadane, Nishant K Vyavahare, Dipali Y Shah, Akash S Kale, Simran K Chaudhari
Journal of Operative Dentistry & Endodontics.2024; 8(1): 1. CrossRef
Evaluation of Pain Following the Use of Different Single-file Glide Path Systems: A Randomized Clinical Trial
Zeliha Danaci, Kübra Yeşildal Yeter
Journal of Endodontics.2024; 50(2): 120. CrossRef
Impact of Different Glidepath Techniques on the Overall Performance of WaveOne Gold in an Artificial S-Shape Canal
Vlad Mircea Lup, Olivia Andreea Marcu, Carlo Gaeta, Gabriela Ciavoi
Dentistry Journal.2024; 12(6): 182. CrossRef
Influence of different irrigant activation methods on apical debris extrusion and bacterial elimination from infected root canals
KSadia Ada, Shibani Shetty, KB Jayalakshmi, PrasannaLatha Nadig, PG Manje Gowda, ArulK Selvan
Journal of Conservative Dentistry.2023; 26(1): 31. CrossRef
A Comparative Evaluation of the Apically Extruded Debris from Root Canals Prepared by R-Motion NiTi File System
Farah B. Al-Saffar, Hikmet A. Al-Gharrawi, Luca Testarelli
International Journal of Dentistry.2023; 2023: 1. CrossRef
Effect of glide path files with different metallurgy on intracanal bacterial extrusion by HyFlex electrical discharge machining file
Priyanka Soni, Pragya Kumar, Sonali Taneja, Anshi Jain
Endodontology.2022; 34(3): 168. CrossRef
Impact of kinematics on the efficiency and safety of an engine-driven file for glide path preparation in MB2 canals of maxillary molars
Larissa B. B. Araújo, Pedro H. S. Calefi, Murilo P. Alcalde, Giulio Gavini, Rodrigo R. Vivan, Marco Antonio Hungaro Duarte
Clinical Oral Investigations.2022; 27(3): 1153. CrossRef
Critical analysis of research methods and experimental models to study removal of root filling materials
Mahdi A. Ajina, Pratik K. Shah, Bun San Chong
International Endodontic Journal.2022; 55(S1): 119. CrossRef
A Comparative Evaluation of Apically Extruded Debris using Three Rotary and One Reciprocating Instrumentation Ni-Ti Systems
Maha Adnan Habeeb
Journal of Orofacial Sciences.2022; 14(2): 93. CrossRef
A critical analysis of research methods and experimental models to study apical extrusion of debris and irrigants
Jale Tanalp
International Endodontic Journal.2022; 55(S1): 153. CrossRef
Evaluation of type of kinematics on glide path procedures and torsional fatigue resistance after preparation of moderately curved canals
Murilo Priori Alcalde, Marco Antonio Hungaro Duarte, Pedro Henrique Souza Calefi, Victor de Moraes Cruz, Bruno Carvalho de Vasconcelos, Marcus Vinícius Reis Só, Rodrigo Ricci Vivan
Brazilian Oral Research.2021;[Epub] CrossRef
Analysis of a glide path creation necessity at the initial stages of endodontic treatment
Z. S. Khabadze, Yu. A. Generalova
Endodontics Today.2021; 19(1): 39. CrossRef
Influence of glide path kinematics during endodontic treatment on the occurrence and intensity of intraoperative and postoperative pain: a systematic review of randomized clinical trials
Thaís Christina Cunha, Felipe de Souza Matos, Luiz Renato Paranhos, Ítalo de Macedo Bernardino, Camilla Christian Gomes Moura
BMC Oral Health.2020;[Epub] CrossRef
Apically extruded debris produced during glide path preparation using R‐Pilot, WaveOne Gold Glider and ProGlider in curved root canals
Cangül Keskin, Özlem Sivas Yilmaz, Uğur Inan
Australian Endodontic Journal.2020; 46(3): 439. CrossRef
Influence of Negotiation, Glide Path, and Preflaring Procedures on Root Canal Shaping—Terminology, Basic Concepts, and a Systematic Review
Gianluca Plotino, Venkateshbabu Nagendrababu, Frederic Bukiet, Nicola M. Grande, Sajesh K. Veettil, Gustavo De-Deus, Hany Mohamed Aly Ahmed
Journal of Endodontics.2020; 46(6): 707. CrossRef
Mechanical Properties of Various Glide Path Preparation Nickel-titanium Rotary Instruments
Joo-Yeong Lee, Sang Won Kwak, Jung-Hong Ha, Ibrahim H. Abu-Tahun, Hyeon-Cheol Kim
Journal of Endodontics.2019; 45(2): 199. CrossRef
Effective Establishment of Glide-Path to Reduce Torsional Stress during Nickel-Titanium Rotary Instrumentation
Ibrahim H. Abu-Tahun, Sang Won Kwak, Jung-Hong Ha, Asgeir Sigurdsson, Mehmet Baybora Kayahan, Hyeon-Cheol Kim
Materials.2019; 12(3): 493. CrossRef
Postoperative pain after glide path preparation using manual, reciprocating and continuous rotary instruments: a randomized clinical trial
C. Keskin, Ö. Sivas Yilmaz, U. Inan, Ö. Özdemir
International Endodontic Journal.2019; 52(5): 579. CrossRef
Intraoperative Pain During Glide Path Creation with the Use of a Rotary or Reciprocating System
Pelin TUFENKCİ, Mehmet ADIGUZEL, Koray YILMAZ
Cumhuriyet Dental Journal.2019; 22(1): 66. CrossRef
Effects of Different Glide Path Files on Apical Debris Extrusion in Curved Root Canals
Betul Gunes, Kubra Yesildal Yeter
Journal of Endodontics.2018; 44(7): 1191. CrossRef

224 View
1 Download
22 Crossref

Effect of surface treatment on the mechanical properties of nickel-titanium files with a similar cross-section: Sang Won Kwak, Joo Yeong Lee, Hye-Jin Goo, Hyeon-Cheol Kim; Restor Dent Endod 2017;42(3):216-223. Published online June 28, 2017; DOI: https://doi.org/10.5395/rde.2017.42.3.216

Abstract PDF PubReader ePub

Objectives

The aim of this study was to compare the mechanical properties of various nickel-titanium (NiTi) files with similar tapers and cross-sectional areas depending on whether they were surface-treated.

Materials and Methods

Three NiTi file systems with a similar convex triangular cross-section and the same ISO #25 tip size were selected for this study: G6 (G6), ProTaper Universal (PTU), and Dia-PT (DPT). To test torsional resistance, 5 mm of the straightened file's tip was fixed between polycarbonate blocks (n = 15/group) and continuous clockwise rotation until fracture was conducted using a customized device. To evaluate cyclic fatigue resistance, files were rotated in an artificial curved canal until fracture in a dynamic mode (n = 15/group). The torsional data were analyzed using 1-way analysis of variance and the Tukey post-hoc comparison test, while the cyclic fatigue data were analyzed using the Mann-Whitney U test at a significance level of 95%.

Results

PTU showed significantly greater toughness, followed by DPT and G6 (p < 0.05). G6 showed the lowest resistance in ultimate torsional strength, while it showed a higher fracture angle than the other files (p < 0.05). In the cyclic fatigue test, DPT showed a significantly higher number of cycles to failure than PTU or G6 (p < 0.05).

Conclusions

Within the limitations of this study, it can be concluded that the torsional resistance of NiTi files was affected by the cross-sectional area, while the cyclic fatigue resistance of NiTi files was influenced by the surface treatment.

Citations

Citations to this article as recorded by

FARKLI YAPISAL ÖZELLİKTEKİ NİKEL-TİTANYUM KÖK KANAL EĞELERİNİN SODYUM HİPOKLORİT VE SERUM FİZYOLOJİK ÇÖZELTİLERİNDEKİ DÖNGÜSEL YORGUNLUK DİRENÇLERİNİN KARŞILAŞTİRİLMASI
Abdulkadir ÖZŞAHİN, Meltem DARTAR ÖZTAN, Emine ODABAŞI TEZER
Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi.2021; : 1. CrossRef
Heat Treatment and Surface Treatment of Nickel–Titanium Endodontic Instruments
Sang Won Kwak, Ya Shen, He Liu, Zhejun Wang, Hyeon-Cheol Kim, Markus Haapasalo
Frontiers in Dental Medicine.2021;[Epub] CrossRef
Torsional Resistance of Two New Heat Treated Nickel Titanium Rotary Instruments: An in Vitro Evaluation
Gianluca Gambarini, Gabriele Miccoli, Dario Di Nardo, Andrea Del Giudice, Alessandro Mazzoni, Marco Seracchiani, Luca Testarelli
Pesquisa Brasileira em Odontopediatria e Clínica Integrada.2020;[Epub] CrossRef

186 View
0 Download
3 Crossref

Effect of adaptive motion on cyclic fatigue resistance of a nickel titanium instrument designed for retreatment: Taha Özyürek, Koray Yılmaz, Gülşah Uslu; Restor Dent Endod 2017;42(1):34-38. Published online December 19, 2016; DOI: https://doi.org/10.5395/rde.2017.42.1.34

Abstract PDF PubReader ePub

Objectives

The aim of this study was to evaluate the cyclic fatigue resistance of the ProTaper Universal D1 file (Dentsply Maillefer) under continuous and adaptive motion.

Materials and Methods

Forty ProTaper Universal D1 files were included in this study. The cyclic fatigue tests were performed using a dynamic cyclic fatigue testing device, which had an artificial stainless steel canal with a 60° angle of curvature and a 5 mm radius of curvature. The files were randomly divided into two groups (Group 1, Rotary motion; Group 2, Adaptive motion). The time to failure of the files were recorded in seconds. The number of cycles to failure (NCF) was calculated for each group. The data were statistically analyzed using Student's t-test. The statistical significant level was set at p < 0.05.

Results

The cyclic fatigue resistance of the adaptive motion group was significantly higher than the rotary motion group (p < 0.05).

Conclusion

Within the limitations of the present study, the ‘Adaptive motion’ significantly increased the resistance of the ProTaper Universal D1 file to cyclic facture.

Citations

Citations to this article as recorded by

The Effect of Different Separated File Retrieval Strategies on the Biomechanical Behavior of a Mandibular Molar: A Finite Element Analysis Study
Anas Sira, Nawar Naguib Nawar, Shehabeldin Mohamed Saber, Hyeon-Cheol Kim
Journal of Endodontics.2025; 51(1): 64. CrossRef
Evaluatation of two nickle-titanium systems’ (Neolix and X Pro Gold) resistance to fracture after immersion in sodium hypochlorite.
Solmaz Araghi, Abbas Delvarani, Faeze dehghan, Parisa Kaghazloo
journal of research in dental sciences.2024; 21(1): 17. CrossRef
Assessment the impact of operator experience on cyclic fatigue resistance in reciprocating and rotary NiTi files: a comparative study between dental students and pediatric dentistry specialists
Hande Özyürek, Mesut Elbay, Taha Özyürek
Frontiers in Materials.2023;[Epub] CrossRef
Evaluation of gutta-percha removal from the dentinal tubules using different instrumentation techniques with or without solvent: An In vitro study
MukeshKumar Hasija, Babita Meena, Deepti Wadhwa, KulvinderKaur Wadhwani, Virender Yadav
Journal of the International Clinical Dental Research Organization.2020; 12(1): 27. CrossRef
Influences of Continuous Rotation and TF adaptive Motion on the Resistance of Different Retreatment File Systems to Deformation and Fracture: An In Vitro study
Divya Meena, Ramyadharshini LNU, V Nivedha, Anand Sherwood
Journal of Operative Dentistry & Endodontics.2018; 3(2): 71. CrossRef
Comparison of cyclic fatigue life of nickel-titanium files: an examination using high-speed camera
Taha Özyürek, Neslihan Büşra Keskin, Fatma Furuncuoğlu, Uğur İnan
Restorative Dentistry & Endodontics.2017; 42(3): 224. CrossRef

196 View
1 Download
6 Crossref

Screw-in forces during instrumentation by various file systems: Jung-Hong Ha, Sang Won Kwak, Sung-Kyo Kim, Hyeon-Cheol Kim; Restor Dent Endod 2016;41(4):304-309. Published online November 8, 2016; DOI: https://doi.org/10.5395/rde.2016.41.4.304

Abstract PDF PubReader ePub

Objectives

The purpose of this study was to compare the maximum screw-in forces generated during the movement of various Nickel-Titanium (NiTi) file systems.

Materials and Methods

Forty simulated canals in resin blocks were randomly divided into 4 groups for the following instruments: Mtwo size 25/0.07 (MTW, VDW GmbH), Reciproc R25 (RPR, VDW GmbH), ProTaper Universal F2 (PTU, Dentsply Maillefer), and ProTaper Next X2 (PTN, Dentsply Maillefer, n = 10). All the artificial canals were prepared to obtain a standardized lumen by using ProTaper Universal F1. Screw-in forces were measured using a custom-made experimental device (AEndoS-k, DMJ system) during instrumentation with each NiTi file system using the designated movement. The rotation speed was set at 350 rpm with an automatic 4 mm pecking motion at a speed of 1 mm/sec. The pecking depth was increased by 1 mm for each pecking motion until the file reach the working length. Forces were recorded during file movement, and the maximum force was extracted from the data. Maximum screw-in forces were analyzed by one-way ANOVA and Tukey's post hoc comparison at a significance level of 95%.

Results

Reciproc and ProTaper Universal files generated the highest maximum screw-in forces among all the instruments while M-two and ProTaper Next showed the lowest (p < 0.05).

Conclusions

Geometrical differences rather than shaping motion and alloys may affect the screw-in force during canal instrumentation. To reduce screw-in forces, the use of NiTi files with smaller cross-sectional area for higher flexibility is recommended.

Citations

Citations to this article as recorded by

Comparison of mechanical properties and shaping performance of ProGlider and ProTaper ultimate slider
Jeyi Song, Ji-Hyun Jang, Seok Woo Chang, Shin Hye Chung, Soram Oh
BMC Oral Health.2025;[Epub] CrossRef
Screw-in force, torque generation, and performance of glide-path files with three rotation kinetics
Jee-Yeon Woo, Ji-Hyun Jang, Seok Woo Chang, Soram Oh
Odontology.2024; 112(3): 761. CrossRef
Comparative evaluation of stress distribution against the root canal wall at three different levels using novel NiTi rotary files – A finite element analysis
Rimjhim Singh, Sandeep Dubey, Palak Singh, Praveen Singh Samant, Suparna Ganguly Saha
Journal of Conservative Dentistry and Endodontics.2024; 27(1): 62. CrossRef
Restoration of teeth lacking complete ferrules using cast precious metal alloy post-and-cores and knife-edged crowns: A retrospective clinical study
Fangyue Xiang, Keying Shi, Haoyang Hua, Jing Zhao, Yuanna Zheng
The Journal of Prosthetic Dentistry.2024;[Epub] CrossRef
Effect of Periodic Changes in Rotation Speed on Torsional Stress and Screw-in Force by Alternative Rotation Technique
Jung-Hong Ha, Hyo-Jin Jo, Sang Won Kwak, Asgeir Sigurdsson, Hyeon-Cheol Kim
Journal of Endodontics.2023; 49(1): 77. CrossRef
A Comparative Evaluation of the Apically Extruded Debris from Root Canals Prepared by R-Motion NiTi File System
Farah B. Al-Saffar, Hikmet A. Al-Gharrawi, Luca Testarelli
International Journal of Dentistry.2023; 2023: 1. CrossRef
Effect of Rotational Modes on Torque/Force Generation and Canal Centering Ability during Rotary Root Canal Instrumentation with Differently Heat-Treated Nickel–Titanium Instruments
Satoshi Omori, Arata Ebihara, Keiko Hirano, Yuka Kasuga, Hayate Unno, Taro Nakatsukasa, Shunsuke Kimura, Keiichiro Maki, Takao Hanawa, Takashi Okiji
Materials.2022; 15(19): 6850. CrossRef
Effect of Core Mass and Alloy on Cyclic Fatigue Resistance of Different Nickel-Titanium Endodontic Instruments in Matching Artificial Canals
Sebastian Bürklein, Lennart Zupanc, David Donnermeyer, Karsten Tegtmeyer, Edgar Schäfer
Materials.2021; 14(19): 5734. CrossRef
Comparison of Torque, Screw-in Force, and Shaping Ability of Glide Path Instruments in Continuous Rotation and Optimum Glide Path Motion
Pyae Hein Htun, Arata Ebihara, Keiichiro Maki, Shunsuke Kimura, Miki Nishijo, Moe Sandar Kyaw, Takashi Okiji
Journal of Endodontics.2021; 47(1): 94. CrossRef
Analysis of Torque and Force Induced by Rotary Nickel-Titanium Instruments during Root Canal Preparation: A Systematic Review
Myint Thu, Arata Ebihara, Sherif Adel, Takashi Okiji
Applied Sciences.2021; 11(7): 3079. CrossRef
Influence of rotational speed on torque/force generation and shaping ability during root canal instrumentation of extracted teeth with continuous rotation and optimum torque reverse motion
M. S. Kyaw, A. Ebihara, Y. Kasuga, K. Maki, S. Kimura, P. H. Htun, T. Nakatsukasa, T. Okiji
International Endodontic Journal.2021; 54(9): 1614. CrossRef
Effect of Optimum Torque Reverse Motion on Torque and Force Generation during Root Canal Instrumentation with Crown-down and Single-length Techniques
Shunsuke Kimura, Arata Ebihara, Keiichiro Maki, Miki Nishijo, Daisuke Tokita, Takashi Okiji
Journal of Endodontics.2020; 46(2): 232. CrossRef
Comparative analysis of torque and apical force to assess the cutting behaviour of ProTaper Next and ProTaper Universal endodontic instruments
Gustavo de Cristofaro Almeida, Diego Pinheiro Aun, Pedro Damas Resende, Isabella Faria da Cunha Peixoto, Ana Cecília Diniz Viana, Vicente Tadeu Lopes Buono, Maria Guiomar de Azevedo Bahia
Australian Endodontic Journal.2020; 46(1): 52. CrossRef
Enhanced root canal-centering ability and reduced screw-in force generation of reciprocating nickel-titanium instruments with a post-machining thermal treatment
Keiichiro MAKI, Arata EBIHARA, Shunsuke KIMURA, Miki NISHIJO, Daisuke TOKITA, Kana MIYARA, Takashi OKIJI
Dental Materials Journal.2020; 39(2): 251. CrossRef
Ex-Vivo Comparison of Torsional Stress on Nickel–Titanium Instruments Activated by Continuous Rotation or Adaptive Motion
Joo Yeong Lee, Sang Won Kwak, Jung-Hong Ha, Hyeon-Cheol Kim
Materials.2020; 13(8): 1900. CrossRef
Evaluation of stress distribution in nickel-titanium rotary instruments with different geometrical designs subjected to bending and torsional load: a finite element study
Manar Galal, Tamer M. Hamdy
Bulletin of the National Research Centre.2020;[Epub] CrossRef
Assessment of mechanical properties of WaveOne Gold Primary reciprocating instruments
Tong FANGLI, Keiichiro MAKI, Shunsuke KIMURA, Miki NISHIJO, Daisuke TOKITA, Arata EBIHARA, Takashi OKIJI
Dental Materials Journal.2019; 38(3): 490. CrossRef
Comparison of Screw-In Forces during Movement of Endodontic Files with Different Geometries, Alloys, and Kinetics
Sang Won Kwak, Chan-Joo Lee, Sung Kyo Kim, Hyeon-Cheol Kim, Jung-Hong Ha
Materials.2019; 12(9): 1506. CrossRef
Gripping the Gripped: Removal of Foreign Bodies from Root Canal System
Shweta Jain, Sachin Jain, Shikha Jain, Sophia Thakur
Dental Research and Management.2019; : 13. CrossRef
Mechanical Properties of Orifice Preflaring Nickel-titanium Rotary Instrument Heat Treated Using T-Wire Technology
Maamoun Ataya, Jung-Hong Ha, Sang Won Kwak, Ibrahim H. Abu-Tahun, Rashid El Abed, Hyeon-Cheol Kim
Journal of Endodontics.2018; 44(12): 1867. CrossRef
How biomechanics can affect the endodontic treated teeth and their restorative procedures?
Carlos José Soares, Monise de Paula Rodrigues, André Luis Faria-e-Silva, Paulo Cesar Freitas Santos-Filho, Crisnicaw Veríssimo, Hyeon-Cheol Kim, Antheunis Versluis
Brazilian Oral Research.2018;[Epub] CrossRef
Evaluation of selected mechanical properties of NiTi rotary glide path files manufactured from controlled memory wires
Miki NISHIJO, Arata EBIHARA, Daisuke TOKITA, Hisashi DOI, Takao HANAWA, Takashi OKIJI
Dental Materials Journal.2018; 37(4): 549. CrossRef
Nickel–titanium instruments in endodontics: a concise review of the state of the art
Giulio Gavini, Marcelo dos Santos, Celso Luis Caldeira, Manoel Eduardo de Lima Machado, Laila Gonzales Freire, Elaine Faga Iglecias, Ove Andrea Peters, George Táccio de Miranda Candeiro
Brazilian Oral Research.2018;[Epub] CrossRef
Dynamic Torque and Vertical Force Analysis during Nickel-titanium Rotary Root Canal Preparation with Different Modes of Reciprocal Rotation
Daisuke Tokita, Arata Ebihara, Miki Nishijo, Kana Miyara, Takashi Okiji
Journal of Endodontics.2017; 43(10): 1706. CrossRef

232 View
4 Download
24 Crossref

Preference of undergraduate students after first experience on nickel-titanium endodontic instruments: Sang Won Kwak, Gary Shun-Pan Cheung, Jung-Hong Ha, Sung Kyo Kim, Hyojin Lee, Hyeon-Cheol Kim; Restor Dent Endod 2016;41(3):176-181. Published online June 23, 2016; DOI: https://doi.org/10.5395/rde.2016.41.3.176

Abstract PDF PubReader ePub

Objectives

This study aimed to compare two nickel-titanium systems (rotary vs. reciprocating) for their acceptance by undergraduate students who experienced nickel-titanium (NiTi) instruments for the first time.

Materials and Methods

Eighty-one sophomore dental students were first taught on manual root canal preparation with stainless-steel files. After that, they were instructed on the use of ProTaper Universal system (PTU, Dentsply Maillefer), then the WaveOne (WO, Dentsply Maillefer). They practiced with each system on 2 extracted molars, before using those files to shape the buccal or mesial canals of additional first molars. A questionnaire was completed after using each file system, seeking students' perception about 'Ease of use', 'Flexibility', 'Cutting-efficiency', 'Screwing-effect', 'Feeling-safety', and 'Instrumentation-time' of the NiTi files, relative to stainless-steel instrumentation, on a 5-point Likert-type scale. They were also requested to indicate their preference between the two systems. Data was compared between groups using t-test, and with Chi-square test for correlation of each perception value with the preferred choice (p = 0.05).

Results

Among the 81 students, 55 indicated their preferred file system as WO and 22 as PTU. All scores were greater than 4 (better) for both systems, compared with stainless-steel files, except for 'Screwing-effect' for PTU. The scores for WO in the categories of 'Flexibility', 'Screwing-effect', and 'Feeling-safety' were significantly higher scores than those of PTU. A significant association between the 'Screwing-effect' and students' preference for WO was observed.

Conclusions

Novice operators preferred nickel-titanium instruments to stainless-steel, and majority of them opted for reciprocating file instead of continuous rotating system.

Citations

Citations to this article as recorded by

Endodontic Procedural Errors and Associated Factors among Undergraduate Dental Students: A Cross-sectional Study
Vivek Padmanabhan, Md Sofiqul Islam, Mohamed A Elsayed, Duaa R Saleh, Amal M Alnahdi
The Journal of Contemporary Dental Practice.2024; 24(12): 998. CrossRef
Clinicians’ perspectives, inducements, preferences, and clinical experiences regarding the use of electronic apex locator and apex locator integrated engine-driven instrumentation: a cross-sectional study
Sena Kaşıkçı, Sena Kolunsağ Özbek, Ebru Şirinoğlu, Olcay Özdemir
BMC Oral Health.2024;[Epub] CrossRef
Evaluation and Comparison of Manual and Mechanical Endodontic Instrumentation Completed by Undergraduate Dental Students on Endodontic Blocks
António Ginjeira, Abayomi O. Baruwa, Karla Baumotte
Dentistry Journal.2024; 12(11): 363. CrossRef
The first experiences of preclinical dentistry students with rotary instruments: A pilot study
Işıl Kaya Büyükbayram, Gizem Çolakoğlu, Sana Mahroos Al-Shammari, Katia Stoicefidis
Saudi Endodontic Journal.2024; 14(2): 205. CrossRef
First Experience of an Undergraduate Dental Student with a Reciprocating System in Simulated Root Canals—A Pilot Study
Ana Rita Arede, Inês Ferreira, Ana Cristina Braga, Irene Pina-Vaz
Applied Sciences.2023; 13(8): 4848. CrossRef
Effect on undergraduate student self-confidence in using 3D printed primary molars for root canal treatment simulation training
C. Delfosse, T. Marquillier, S. Ndoye, P.-Y. Cousson, M. Hennequin, C. Catteau
European Archives of Paediatric Dentistry.2023; 24(1): 105. CrossRef
Influence of operator expertise on glide path and root canal preparation of curved root canals with rotary and reciprocating motions
Ana Belén Dablanca‐Blanco, Ana Arias, María José Ginzo‐Villamayor, María Consuelo Pérez, Pablo Castelo‐Baz, Benjamín Martín‐Biedma
Australian Endodontic Journal.2022; 48(1): 37. CrossRef
Quality of root canal treatment performed by undergraduate students using nickel‐titanium reciprocating versus hand instruments
Seniha Miçooğulları Kurt, Gözde Kandemir Demirci, Burcu Serefoglu, Mehmet Emin Kaval, Pelin Güneri, Mehmet Kemal Çalışkan
Journal of Dental Education.2022; 86(12): 1662. CrossRef
Radiographic assessment of endodontic mishaps in an undergraduate student clinic: a 2-year retrospective study
Manal Matoug-Elwerfelli, Ahmed Abdou, Wejdan Almutairi, Malak Alhuthayli, Shaikhah Aloyaynaa, Rahaf Almohareb
PeerJ.2022; 10: e13858. CrossRef
Ex vivo shaping ability of reciprocating instruments operated by new users: Reciproc versus WaveOne
Mary S. H. Lam, Jeffrey W. W. Chang, Gary S. P. Cheung
Clinical Oral Investigations.2021; 25(5): 2791. CrossRef
Body temperature fatigue behaviour of reciprocating and rotary glide path instruments in sodium hypochlorite solutions alone or combined with etidronate
Dario Perez‐Villalba, José C. Macorra, Juan J. Perez‐Higueras, Ove A. Peters, Ana Arias
Australian Endodontic Journal.2021; 47(3): 450. CrossRef
Undergraduate Students’ Acceptance of a Reciprocating One-File System for Endodontic Treatment
Benjamin Mahmoodi, Adriano Azaripour, Kawe Sagheb, Keyvan Sagheb, Brita Willershausen, Jens Weusmann
European Journal of Dentistry.2020; 14(03): 393. CrossRef
Fracture of endodontic instruments - Part 1: Literature review on factors that influence instrument breakage
Maheshan Pillay, Martin Vorster, Peet J Van der Vyver
South African Dental Journal.2020; 75(10): 553. CrossRef
A comparative study of root canal shaping using protaper universal and protaper next rotary files in preclinical dental education
Gül Çelik, Feyza Özdemir Kısacık, Emir Faruk Yılmaz, Arife Mersinlioğlu, İhsan Furkan Ertuğrul, Hikmet Orhan
PeerJ.2019; 7: e7419. CrossRef
Undergraduate dentistry students’ perception of difficulties regarding endodontic treatment
Lorrane G. Tavares, Stella M. F. Lima, Miriane G. Lima, Marcos P. Arruda, Thiago C. Menegazzi, Taia M. B. Rezende
Australian Endodontic Journal.2019; 45(1): 98. CrossRef
First Experience of Rotary Nickel Titanium Root Canal Instrumentation Performed by Undergraduate Students and General Dentists
marwa sharaan, Noreen Kamel, Dimitrios Tziafas
Journal of Dentistry and Oral Care.2017; 3(2): 1. CrossRef

224 View
2 Download
16 Crossref

Effect of repetitive pecking at working length for glide path preparation using G-file: Jung-Hong Ha, Hyo-Jin Jeon, Rashid El Abed, Seok-Woo Chang, Sung-Kyo Kim, Hyeon-Cheol Kim; Restor Dent Endod 2015;40(2):123-127. Published online January 7, 2015; DOI: https://doi.org/10.5395/rde.2015.40.2.123

Abstract PDF PubReader ePub

Objectives

Glide path preparation is recommended to reduce torsional failure of nickel-titanium (NiTi) rotary instruments and to prevent root canal transportation. This study evaluated whether the repetitive insertions of G-files to the working length maintain the apical size as well as provide sufficient lumen as a glide path for subsequent instrumentation.

Materials and Methods

The G-file system (Micro-Mega) composed of G1 and G2 files for glide path preparation was used with the J-shaped, simulated resin canals. After inserting a G1 file twice, a G2 file was inserted to the working length 1, 4, 7, or 10 times for four each experimental group, respectively (n = 10). Then the canals were cleaned by copious irrigation, and lubricated with a separating gel medium. Canal replicas were made using silicone impression material, and the diameter of the replicas was measured at working length (D0) and 1 mm level (D1) under a scanning electron microscope. Data was analysed by one-way ANOVA and post-hoc tests (p = 0.05).

Results

The diameter at D0 level did not show any significant difference between the 1, 2, 4, and 10 times of repetitive pecking insertions of G2 files at working length. However, 10 times of pecking motion with G2 file resulted in significantly larger canal diameter at D1 (p < 0.05).

Conclusions

Under the limitations of this study, the repetitive insertion of a G2 file up to 10 times at working length created an adequate lumen for subsequent apical shaping with other rotary files bigger than International Organization for Standardization (ISO) size 20, without apical transportation at D0 level.

Citations

Citations to this article as recorded by

Glide Path – An Ineluctable Route for Successful Endodontic Mechanics: A Literature Review
Mahima Bharat Mehta, Anupam Sharma, Aniket Jadhav, Aishwarya Handa, Abhijit Bajirao Jadhav, Ashwini A. Narayanan
Journal of the International Clinical Dental Research Organization.2024; 16(2): 101. CrossRef
Effect of repetitive up-and-down movements on torque/force generation, surface defects and shaping ability of nickel-titanium rotary instruments: an ex vivo study
Moe Sandar Kyaw, Arata Ebihara, Yoshiko Iino, Myint Thu, Keiichiro Maki, Shunsuke Kimura, Pyae Hein Htun, Takashi Okiji
BMC Oral Health.2024;[Epub] CrossRef
Influence of the Number of Pecking Motions at Working Length on the Shaping Ability of Single-file Systems in Long Oval-shaped Curved Canals
Lixiao Wang, Ruitian Lin, Hui Chen, Zihan Li, Franklin R. Tay, Lisha Gu
Journal of Endodontics.2022; 48(4): 548. CrossRef
Influence of pecking frequency at working length on the volume of apically extruded debris: A micro-computed tomography analysis
Li-Xiao Wang, Hui Chen, Rui-Tian Lin, Li-Sha Gu
Journal of Dental Sciences.2022; 17(3): 1274. CrossRef
Comparison of the effects from coronal pre‐flaring and glide‐path preparation on torque generation during root canal shaping procedure
Sang Won Kwak, Jung‐Hong Ha, Ya Shen, Markus Haapasalo, Hyeon‐Cheol Kim
Australian Endodontic Journal.2022; 48(1): 131. CrossRef
Effective Establishment of Glide-Path to Reduce Torsional Stress during Nickel-Titanium Rotary Instrumentation
Ibrahim H. Abu-Tahun, Sang Won Kwak, Jung-Hong Ha, Asgeir Sigurdsson, Mehmet Baybora Kayahan, Hyeon-Cheol Kim
Materials.2019; 12(3): 493. CrossRef
Stress Generation during Pecking Motion of Rotary Nickel-titanium Instruments with Different Pecking Depth
Jung-Hong Ha, Sang Won Kwak, Asgeir Sigurdsson, Seok Woo Chang, Sung Kyo Kim, Hyeon-Cheol Kim
Journal of Endodontics.2017; 43(10): 1688. CrossRef
Debris extrusion by glide-path establishing endodontic instruments with different geometries
Jung-Hong Ha, Sung Kyo Kim, Sang Won Kwak, Rashid El Abed, Yong Chul Bae, Hyeon-Cheol Kim
Journal of Dental Sciences.2016; 11(2): 136. CrossRef
Effects of Pitch Length and Heat Treatment on the Mechanical Properties of the Glide Path Preparation Instruments
Sang Won Kwak, Jung-Hong Ha, Chan-Joo Lee, Rashid El Abed, Ibrahim H. Abu-Tahun, Hyeon-Cheol Kim
Journal of Endodontics.2016; 42(5): 788. CrossRef

262 View
4 Download
9 Crossref

Buckling resistance, bending stiffness, and torsional resistance of various instruments for canal exploration and glide path preparation: Sang-Won Kwak, Jung-Hong Ha, WooCheol Lee, Sung-Kyo Kim, Hyeon-Cheol Kim; Restor Dent Endod 2014;39(4):270-275. Published online July 16, 2014; DOI: https://doi.org/10.5395/rde.2014.39.4.270

Abstract PDF PubReader ePub

Objectives

This study compared the mechanical properties of various instruments for canal exploration and glide-path preparations.

Materials and Methods

The buckling resistance, bending stiffness, ultimate torsional strength, and fracture angle under torsional load were compared for C+ file (CP, Dentsply Maillefer), M access K-file (MA, Dentsply Maillefer), Mani K-file (MN, Mani), and NiTiFlex K-file (NT, Dentsply Maillefer). The files of ISO size #15 and a shaft length of 25 mm were selected. For measuring buckling resistance (n = 10), the files were loaded in the axial direction of the shaft, and the maximum load was measured during the files' deflection. The files (n = 10) were fixed at 3-mm from the tip and then bent 45° with respect to their long axis, while the bending force was recorded by a load cell. For measuring the torsional properties, the files (n = 10) were also fixed at 3-mm, and clockwise rotations (2-rpm) were applied to the files in a straight state. The torsional load and the distortion angle were recorded until the files succumbed to the torque.

Results

The CP was shown to require the highest load to buckle and bend the files, and the NT showed the least. While MA and MN showed similar buckling resistances, MN showed higher bending stiffness than MA. The NT had the lowest bending stiffness and ultimate torsional strength (p < 0.05).

Conclusions

The tested instruments showed different mechanical properties depending on the evaluated parameters. CP and NT files were revealed to be the stiffest and the most flexible instruments, respectively.

Citations

Citations to this article as recorded by

Buckling resistance of various pathfinding endodontic instruments: An in vitro study
Ujjwal Das, Rajesh Kumar Das, Kallol Kumar Saha, Lugu Buru Murmu, Srimanta Banerjee, Rishila Nag
Journal of Conservative Dentistry and Endodontics.2025; 28(4): 384. CrossRef
Comparison of torsional, bending, and buckling resistances of different nickel-titanium glide path files
Feyyaz Çeliker, İrem Çetinkaya
Matéria (Rio de Janeiro).2024;[Epub] CrossRef
Comparative Analysis of Endodontic 0.15 Stainless-Steel K-Files: Exploring Design, Composition, and Mechanical Performance
Abayomi Omokeji Baruwa, Filipa Chasqueira, Sofia Arantes-Oliveira, João Caramês, Duarte Marques, Jaime Portugal, Jorge N. R. Martins
Dentistry Journal.2024; 12(2): 29. CrossRef
Comparative Analysis of Endodontic ISO Size 06, 08, and 10 Stainless Steel K-Files Used for Glide Path Procedures
Abayomi Omokeji Baruwa, Filipa Chasqueira, Sofia Arantes-Oliveira, João Caramês, Duarte Marques, Jaime Portugal, Jorge N. R. Martins
Dentistry Journal.2024; 12(4): 98. CrossRef
Glide Path in Endodontics: A Literature Review of Current Knowledge
Vlad Mircea Lup, Giulia Malvicini, Carlo Gaeta, Simone Grandini, Gabriela Ciavoi
Dentistry Journal.2024; 12(8): 257. CrossRef
Shaping Ability and Buckling Resistance of TruNatomy, WaveOne gold, and XP-Endo Shaper Single-File Systems
Neveen Ali Shaheen, Nahla Gamal Eldin Elhelbawy
Contemporary Clinical Dentistry.2022; 13(3): 261. CrossRef
A comparison of different hand and rotary endodontic glide path files for buckling resistance
Ruchika Gupta, Pramod Mohite, Suvarna Patil, Nandita Bansal
Endodontology.2021; 33(2): 102. CrossRef
Buckling Resistance of Various Nickel-Titanium Glide Path Preparation Instruments in Dynamic or Static Mode
Jung-Hong Ha, Sang Won Kwak, Antheunis Versluis, Hyeon-Cheol Kim
Journal of Endodontics.2020; 46(8): 1125. CrossRef
Influence of heat treatment on color and flexibility of nickel-titanium endodontic instruments
Bernardo Corrêa de ALMEIDA, Carlos Nelson ELIAS
RGO - Revista Gaúcha de Odontologia.2020;[Epub] CrossRef
Influence of Negotiation, Glide Path, and Preflaring Procedures on Root Canal Shaping—Terminology, Basic Concepts, and a Systematic Review
Gianluca Plotino, Venkateshbabu Nagendrababu, Frederic Bukiet, Nicola M. Grande, Sajesh K. Veettil, Gustavo De-Deus, Hany Mohamed Aly Ahmed
Journal of Endodontics.2020; 46(6): 707. CrossRef
Mechanical Properties of Various Heat-treated Nickel-titanium Rotary Instruments
Hye-Jin Goo, Sang Won Kwak, Jung-Hong Ha, Eugenio Pedullà, Hyeon-Cheol Kim
Journal of Endodontics.2017; 43(11): 1872. CrossRef
Debris extrusion by glide-path establishing endodontic instruments with different geometries
Jung-Hong Ha, Sung Kyo Kim, Sang Won Kwak, Rashid El Abed, Yong Chul Bae, Hyeon-Cheol Kim
Journal of Dental Sciences.2016; 11(2): 136. CrossRef

318 View
9 Download
12 Crossref

Cyclic fatigue resistance tests of Nickel-Titanium rotary files using simulated canal and weight loading conditions: Ok-In Cho, Antheunis Versluis, Gary SP Cheung, Jung-Hong Ha, Bock Hur, Hyeon-Cheol Kim; Restor Dent Endod 2013;38(1):31-35. Published online February 26, 2013; DOI: https://doi.org/10.5395/rde.2013.38.1.31

Abstract PDF PubReader ePub

Objectives

This study compared the cyclic fatigue resistance of nickel-titanium (NiTi) files obtained in a conventional test using a simulated canal with a newly developed method that allows the application of constant fatigue load conditions.

Materials and Methods

ProFile and K3 files of #25/.06, #30/.06, and #40/.04 were selected. Two types of testing devices were built to test their fatigue performance. The first (conventional) device prescribed curvature inside a simulated canal (C-test), the second new device exerted a constant load (L-test) whilst allowing any resulting curvature. Ten new instruments of each size and brand were tested with each device. The files were rotated until fracture and the number of cycles to failure (NCF) was determined. The NCF were subjected to one-way ANOVA and Duncan's post-hoc test for each method. Spearman's rank correlation coefficient was computed to examine any association between methods.

Results

Spearman's rank correlation coefficient (ρ = -0.905) showed a significant negative correlation between methods. Groups with significant difference after the L-test divided into 4 clusters, whilst the C-test gave just 2 clusters. From the L-test, considering the negative correlation of NCF, K3 gave a significantly lower fatigue resistance than ProFile as in the C-test. K3 #30/.06 showed a lower fatigue resistance than K3 #25/.06, which was not found by the C-test. Variation in fatigue test methodology resulted in different cyclic fatigue resistance rankings for various NiTi files.

Conclusions

The new methodology standardized the load during fatigue testing, allowing determination fatigue behavior under constant load conditions.

Citations

Citations to this article as recorded by

Effect of autoclave sterilization on the cyclic fatigue resistance of EdgeFile X7, 2Shape, and F-one nickel–titanium endodontic instruments
ArkanH Al-Amidi, HikmetAbdul-Rahim Al-Gharrawi
Journal of Conservative Dentistry.2023; 26(1): 26. CrossRef
Investigation of cyclic fatigue of rotary endodontic instruments
Z. S. Khabadze, F. R. Ismailov
Endodontics Today.2022; 20(1): 28. CrossRef
Torsional Resistance of Heat-Treated Nickel-Titanium Instruments under Different Temperature Conditions
Hyo Jin Jo, Sang Won Kwak, Hyeon-Cheol Kim, Sung Kyo Kim, Jung-Hong Ha
Materials.2021; 14(18): 5295. CrossRef
Effect of surface treatment on the mechanical properties of nickel-titanium files with a similar cross-section
Sang Won Kwak, Joo Yeong Lee, Hye-Jin Goo, Hyeon-Cheol Kim
Restorative Dentistry & Endodontics.2017; 42(3): 216. CrossRef
Effect from Rotational Speed on Torsional Resistance of the Nickel-titanium Instruments
Jung-Hong Ha, Sang Won Kwak, Sung Kyo Kim, Asgeir Sigurdsson, Hyeon-Cheol Kim
Journal of Endodontics.2017; 43(3): 443. CrossRef
Mechanical Properties of Various Heat-treated Nickel-titanium Rotary Instruments
Hye-Jin Goo, Sang Won Kwak, Jung-Hong Ha, Eugenio Pedullà, Hyeon-Cheol Kim
Journal of Endodontics.2017; 43(11): 1872. CrossRef
Cyclic Fatigue Resistance and Force Generated by OneShape Instruments during Curved Canal Preparation
Zhuyu Wang, Wen Zhang, Xiaolei Zhang, Luigi F. Rodella
PLOS ONE.2016; 11(8): e0160815. CrossRef
Conditioning of root canal anatomy on static and dynamics of nickel-titanium rotary instruments
Italo Di Giuseppe, Davide Di Giuseppe, Vito Antonio Malagnino, Enrico Paolo Silla, Francesco Somma
Giornale Italiano di Endodonzia.2015; 29(2): 58. CrossRef
Effect from surface treatment of nickel‐titanium rotary files on the fracture resistance
Bo Hoon Kim, Jung‐Hong Ha, Woo Cheol Lee, Sang‐Won Kwak, Hyeon‐Cheol Kim
Scanning.2015; 37(1): 82. CrossRef
Effect of alloy type on the life‐time of torsion‐preloaded nickel‐titanium endodontic instruments
Jung‐Hong Ha, Sung Kyo Kim, Gary Shun‐Pan Cheung, Seong Hwa Jeong, Yong Chul Bae, Hyeon‐Cheol Kim
Scanning.2015; 37(3): 172. CrossRef
‘Screw‐in’ tendency of rotary nickel–titanium files due to design geometry
J. H. Ha, G. S. P. Cheung, A. Versluis, C. J. Lee, S. W. Kwak, H. C. Kim
International Endodontic Journal.2015; 48(7): 666. CrossRef
Elastic Limits in Torsion of Reciprocating Nickel-Titanium Instruments
Jung-Hong Ha, Seo-Ryeong Kim, Antheunis Versluis, Gary Shun-Pan Cheung, Jin-Woon Kim, Hyeon-Cheol Kim
Journal of Endodontics.2015; 41(5): 715. CrossRef
Buckling resistance, bending stiffness, and torsional resistance of various instruments for canal exploration and glide path preparation
Sang-Won Kwak, Jung-Hong Ha, WooCheol Lee, Sung-Kyo Kim, Hyeon-Cheol Kim
Restorative Dentistry & Endodontics.2014; 39(4): 270. CrossRef
Safety of the Factory Preset Rotation Angle of Reciprocating Instruments
Jin-Woon Kim, Jung-Hong Ha, Gary Shun-Pan Cheung, Antheunis Versluis, Sang-Won Kwak, Hyeon-Cheol Kim
Journal of Endodontics.2014; 40(10): 1671. CrossRef
Cyclic Fatigue Resistance of Rotary NiTi Instruments after Simulated Clinical Use in Curved Root Canals
Oscar Faciola Pessoa, Juliana Melo da Silva, Giulio Gavini
Brazilian Dental Journal.2013; 24(2): 117. CrossRef
Methods and models to study nickel–titanium instruments
Ya Shen, Gary S.P. Cheung
Endodontic Topics.2013; 29(1): 18. CrossRef
An overview of the mechanical properties of nickel–titanium endodontic instruments
Huimin Zhou, Bin Peng, Yu‐Feng Zheng
Endodontic Topics.2013; 29(1): 42. CrossRef

240 View
1 Download
17 Crossref

Comparison of the centering ability of Wave·One and Reciproc nickel-titanium instruments in simulated curved canals: Young-Jun Lim, Su-Jung Park, Hyeon-Cheol Kim, Kyung-San Min; Restor Dent Endod 2013;38(1):21-25. Published online February 26, 2013; DOI: https://doi.org/10.5395/rde.2013.38.1.21

Abstract PDF PubReader ePub

Objectives

The aim of this study was to evaluate the shaping ability of newly marketed single-file instruments, Wave·One (Dentsply-Maillefer) and Reciproc (VDW GmbH), in terms of maintaining the original root canal configuration and curvature, with or without a glide-path.

Materials and Methods

According to the instruments used, the blocks were divided into 4 groups (n = 10): Group 1, no glide-path / Wave·One; Group 2, no glide-path / Reciproc; Group 3, #15 K-file / Wave·One; Group 4, #15 K-file / Reciproc. Pre- and post-instrumented images were scanned and the canal deviation was assessed. The cyclic fatigue stress was loaded to examine the cross-sectional shape of the fractured surface. The broken fragments were evaluated under the scanning electron microscope (SEM) for topographic features of the cross-section. Statistically analysis of the data was performed using one-way analysis of variance followed by Tukey's test (α = 0.05).

Results

The ability of instruments to remain centered in prepared canals at 1 and 2 mm levels was significantly lower in Group 1 (p < 0.05). The centering ratio at 3, 5, and 7 mm level were not significantly different.

Conclusions

The Wave·One file should be used following establishment of a glide-path larger than #15.

Citations

Citations to this article as recorded by

Evaluation of the Centering Ability and Canal Transportation of Rotary File Systems in Different Kinematics Using CBCT
Nupur R Vasava, Shreya H Modi, Chintan Joshi, Mona C Somani, Sweety J Thumar, Aashray A Patel, Anisha D Parmar, Kruti M Jadawala
World Journal of Dentistry.2024; 14(11): 983. CrossRef
Comparative Evaluation of Root Canal Centering Ability of ProTaper, Mtwo, WaveOne, and Reciproc Using Cone-beam Computed Tomography: In Vitro Study
M Remya, Asha Joseph, Prabath Singh, Anju Varughese, Pallavi Chandran, Deepthy Subramanian, S Vijay Kumar
The Journal of Contemporary Dental Practice.2022; 23(6): 589. CrossRef
Shaping ability of ProTaper Gold and WaveOne Gold nickel-titanium rotary instruments in simulated S-shaped root canals
Lu Shi, Junling Zhou, Jie Wan, Yunfei Yang
Journal of Dental Sciences.2022; 17(1): 430. CrossRef
Comparison of canal transportation and centering ability of manual K-files and reciprocating files in glide path preparation: a micro-computed tomography study of constricted canals
Jing-Yi Liu, Zhi-Xiong Zhou, Wei-Ju Tseng, Bekir Karabucak
BMC Oral Health.2021;[Epub] CrossRef
Canal transportation and centering ability of root canals prepared using rotary and reciprocating systems with and without PathFiles in cone-beam computed tomography-based three-dimensional molar prototypes
MSruthi Sunildath, Josey Mathew, Liza George, RV Vineet, Priya Thomas, Dhanya John
Journal of Conservative Dentistry.2021; 24(3): 246. CrossRef
Shaping Ability of Reciproc R25 File and Mtwo System Used in Continuous and Reciprocating Motion
Vincenzo Campanella, Leonardo Gianni, Antonio Libonati, Gianni Gallusi
The Journal of Contemporary Dental Practice.2020; 21(2): 171. CrossRef
Canal shaping with a reciprocating system is easy to learn
E. Muñoz, L. Forner, S. Garcet, F. J. Rodríguez‐Lozano, C. Llena
International Endodontic Journal.2019; 52(8): 1244. CrossRef
Shaping Ability of HyFlex EDM and ProTaper Next Rotary Instruments in Curved Root Canals: A Micro-CT Study
Ahmed K Turkistani, Madiha M Gomaa, Lubna A Shafei, Loai Alsofi, Abdul Majeed, Emad AlShwaimi
The Journal of Contemporary Dental Practice.2019; 20(6): 680. CrossRef
Root canal volume change and transportation by Vortex Blue, ProTaper Next, and ProTaper Universal in curved root canals
Hyun-Jin Park, Min-Seock Seo, Young-Mi Moon
Restorative Dentistry & Endodontics.2018;[Epub] CrossRef
Comparison of shaping ability of ProTaper Next and 2Shape nickel–titanium files in simulated severe curved canals
Simone Staffoli, Taha Özyürek, Avi Hadad, Alex Lvovsky, Michael Solomonov, Hadas Azizi, Joe Ben Itzhak, Maurizo Bossù, Nicola M. Grande, Gianluca Plotino, Antonella Polimeni
Giornale Italiano di Endodonzia.2018; 32(2): 52. CrossRef
Comparing the Centering Ability of Different Pathfinding Systems and Their Effect on Final Instrumentation by Hyflex CM
Lu Shi, Shova Wagle
Journal of Endodontics.2017; 43(11): 1868. CrossRef
Rotary endodontics in primary teeth – A review
Sageena George, S. Anandaraj, Jyoti S. Issac, Sheen A. John, Anoop Harris
The Saudi Dental Journal.2016; 28(1): 12. CrossRef
Performance of Three Single Instrument Systems in the Preparation of Long Oval Canals
Beatriz Serrato Coelho, Rodrigo Otavio Jatahy Ferreira do Amaral, Denise Piotto Leonardi, Bruno Marques-da-Silva, Yara Teresinha Corrêa Silva-Sousa, Fredson Marcio Acris de Carvalho, Flares Baratto-Filho
Brazilian Dental Journal.2016; 27(2): 217. CrossRef
Quantitative transportation assessment in curved canals prepared with an off-centered rectangular design system
Emmanuel João Nogueira Leal SILVA, Vania Cristina Gomes VIEIRA, Michele Dias Nunes TAMEIRÃO, Felipe Gonçalves BELLADONNA, Aline de Almeida NEVES, Erick Miranda SOUZA, Gustavo DE-DEUS
Brazilian Oral Research.2016;[Epub] CrossRef
Influence of Cervical and Apical Enlargement Associated with the WaveOne System on the Transportation and Centralization of Endodontic Preparations
Rodrigo Otavio Jatahy Ferreira do Amaral, Denise Piotto Leonardi, Marilisa Carneiro Leão Gabardo, Beatriz Serrato Coelho, Kauhanna Vianna de Oliveira, Flares Baratto Filho
Journal of Endodontics.2016; 42(4): 626. CrossRef
Comparison of canal transportation in simulated curved canals prepared with ProTaper Universal and ProTaper Gold systems
Emmanuel João Nogueira Leal Silva, Brenda Leite Muniz, Frederico Pires, Felipe Gonçalves Belladonna, Aline Almeida Neves, Erick Miranda Souza, Gustavo De-Deus
Restorative Dentistry & Endodontics.2016; 41(1): 1. CrossRef
The Influence of Brushing Motion on the Cutting Behavior of 3 Reciprocating Files in Oval-shaped Canals
Shereen Alattar, Walid Nehme, Franck Diemer, Alfred Naaman
Journal of Endodontics.2015; 41(5): 703. CrossRef
Cyclic fatigue of instruments for endodontic glide path
Gianluca Gambarini, Gianluca Plotino, GianPaolo Sannino, Nicola Maria Grande, Alessio Giansiracusa, Lucila Piasecki, Ulisses Xavier da Silva Neto, Dina Al-Sudani, Luca Testarelli
Odontology.2015; 103(1): 56. CrossRef
Influence of the glide path on various parameters of root canal prepared with WaveOne reciprocating file using cone beam computed tomography
Anil Dhingra, Nidhi Nagar, Vipul Sapra
Dental Research Journal.2015; 12(6): 534. CrossRef
Apical Transportation, Centering Ability, and Cleaning Effectiveness of Reciprocating Single-file System Associated with Different Glide Path Techniques
Guilherme Moreira de Carvalho, Emílio Carlos Sponchiado Junior, Angela Delfina Bittencourt Garrido, Raphael Carlos Comelli Lia, Lucas da Fonseca Roberti Garcia, André Augusto Franco Marques
Journal of Endodontics.2015; 41(12): 2045. CrossRef
Influence of cervical preflaring on apical transportation in curved root canals instrumented by reciprocating file systems
Neisiana Barbieri, Denise Piotto Leonardi, Marina Samara Baechtold, Gisele Maria Correr, Marilisa Carneiro Leão Gabardo, João César Zielak, Flares Baratto-Filho
BMC Oral Health.2015;[Epub] CrossRef
Current Assessment of Reciprocation in Endodontic Preparation: A Comprehensive Review—Part II: Properties and Effectiveness
Gianluca Plotino, Hany Mohamed Aly Ahmed, Nicola Maria Grande, Stephen Cohen, Frédéric Bukiet
Journal of Endodontics.2015; 41(12): 1939. CrossRef
Influence of flexion angle of files on the decentralization of oval canals during instrumentation
Maria Antonieta Veloso Carvalho de OLIVEIRA, Letícia Duarte ALVES, Analice Giovani PEREIRA, Luís Henrique Araújo RAPOSO, João Carlos Gabrielli BIFFI
Brazilian Oral Research.2015; 29(1): 1. CrossRef
Quantitative Transportation Assessment in Simulated Curved Canals Prepared with an Adaptive Movement System
Emmanuel João Nogueira Leal Silva, Michele Dias Nunes Tameirão, Felipe Gonçalves Belladonna, Aline Almeida Neves, Erick Miranda Souza, Gustavo De-Deus
Journal of Endodontics.2015; 41(7): 1125. CrossRef
Efficacy of reciprocating and rotary systems for removing root filling material: A micro-computed tomography study
D. Helvacioglu-Yigit, A. Yilmaz, G. Kiziltas-Sendur, O. S. Aslan, P. V. Abbott
Scanning.2014; 36(6): 576. CrossRef
Effect of passive ultrasonic agitation during final irrigation on cleaning capacity of hybrid instrumentation
Marcilene Coelho Vinhorte, Eduardo Hideki Suzuki, Maíra Sousa de Carvalho, André Augusto Franco Marques, Emílio Carlos Sponchiado Júnior, Lucas da Fonseca Roberti Garcia
Restorative Dentistry & Endodontics.2014; 39(2): 104. CrossRef
Performance of RaCe Instrumentation System in Curved Root Canals: A Comprehensive Analysis by Three Study Methods
Denise Piotto Leonardi, Gilson Blitzkow Sydney, Mario Tanomaru Filho, Flares Baratto-Filho, Samantha Schaffer Pugsley Baratto, Paulo Sergio Cerri
Brazilian Dental Journal.2013; 24(3): 230. CrossRef
Endodontic treatment of mandibular molar with root dilaceration using Reciproc single-file system
Daniely Amorin Meireles, Mariana Mena Barreto Bastos, André Augusto Franco Marques, Lucas da Fonseca Roberti Garcia, Emílio Carlos Sponchiado
Restorative Dentistry & Endodontics.2013; 38(3): 167. CrossRef

248 View
2 Download
28 Crossref

Influence of glide path on the screw-in effect and torque of nickel-titanium rotary files in simulated resin root canals: Jung-Hong Ha, Sang-Shin Park; Restor Dent Endod 2012;37(4):215-219. Published online November 21, 2012; DOI: https://doi.org/10.5395/rde.2012.37.4.215

Abstract PDF PubReader ePub

Objectives

The purpose of this study was to investigate the screw-in effect and torque generation depending on the size of glide path during root canal preparation.

Materials and Methods

Forty Endo-Training Blocks (REF A 0177, Dentsply Maillefer) were used. They were divided into 4 groups. For groups 1, 2, 3, and 4, the glide path was established with ISO #13 Path File (Dentsply Maillefer), #15 NiTi K-file NITIFLEX (Dentsply Maillefer), modified #16 Path File (equivalent to #18), and #20 NiTi K-file NITIFLEX, respectively. The screw-in force and resultant torque were measured using a custom-made experimental apparatus while canals were instrumented with ProTaper S1 (Dentsply Maillefer) at a constant speed of 300 rpm with an automated pecking motion. A statistical analysis was performed using one-way analysis of variance and the Duncan post hoc comparison test.

Results

Group 4 showed lowest screw-in effect (2.796 ± 0.134) among the groups (p < 0.05). Torque was inversely proportional to the glide path of each group. In #20 glide path group, the screw-in effect and torque decreased at the last 1 mm from the apical terminus. However, in the other groups, the decrease of the screw-in effect and torque did not occur in the last 1 mm from the apical terminus.

Conclusions

The establishment of a larger glide path before NiTi rotary instrumentation appears to be appropriate for safely shaping the canal. It is recommended to establish #20 glide path with NiTi file when using ProTaper NiTi rotary instruments system safely.

Citations

Citations to this article as recorded by

Comparison of Debris Extrusion and Preparation Time by Traverse, R‐Motion Glider C, and Other Glide Path Systems in Severely Curved Canals
Taher Al Omari, Layla Hassouneh, Khawlah Albashaireh, Alaa Dkmak, Rami Albanna, Ali Al-Mohammed, Ahmed Jamleh, Lucas da Fonseca Roberti Garcia
International Journal of Dentistry.2025;[Epub] CrossRef
Three-Dimensional Printed Teeth in Endodontics: A New Protocol for Microcomputed Tomography Studies
Tiago Reis, Cláudia Barbosa, Margarida Franco, Ruben Silva, Nuno Alves, Pablo Castelo-Baz, Jose Martín-Cruces, Benjamín Martín-Biedma
Materials.2024; 17(8): 1899. CrossRef
Evaluation of Pain Following the Use of Different Single-file Glide Path Systems: A Randomized Clinical Trial
Zeliha Danaci, Kübra Yeşildal Yeter
Journal of Endodontics.2024; 50(2): 120. CrossRef
Cone-beam computed tomographic evaluation and fracture resistance of endodontically retreated teeth using hyflex remover, Mtwo, and ProTaper retreatment file systems: An in vitro study
Isha Singh, Dakshita Joy Sinha, Pallavi Sharma, Kunal Bedi, Priyanka Rani, Swapnil Vats
Saudi Endodontic Journal.2024; 14(1): 56. CrossRef
Screw-in force, torque generation, and performance of glide-path files with three rotation kinetics
Jee-Yeon Woo, Ji-Hyun Jang, Seok Woo Chang, Soram Oh
Odontology.2024; 112(3): 761. CrossRef
Nickel ion release and surface analyses on instrument fragments fractured beyond the apex: a laboratory investigation
Sıdıka Mine Toker, Ekim Onur Orhan, Arzu Beklen
BMC Oral Health.2023;[Epub] CrossRef
Evaluation of the Efficiency to Remove the Infected Dentin via Enterococcus faecalis Bacterial Count and to Adequately Shape the Canal Using Hand Kedo-SH Files, Rotary Kedo-SG (Blue) and Pro AF Baby Gold Files in Primary Molars: An In Vitro Study
Shruthi B Patil, Kaavya Shanker
International Journal of Clinical Pediatric Dentistry.2023; 16(S2): S142. CrossRef
Buckling resistance, torque, and force generation during retreatment with D-RaCe, HyFlex Remover, and Mtwo retreatment files
Yoojin Kim, Seok Woo Chang, Soram Oh
Restorative Dentistry & Endodontics.2023;[Epub] CrossRef
Cyclic and torsional fatigue resistance of a new rotary file on a rotary and reciprocating motion
Gabriel Barcelos Só, Giovana Siocheta, Pedro Calefi, Murilo Alcalde, Rodrigo Ricci Vivan, Marco Antônio H. Duarte, Marcus Vinicius Reis Só, Ricardo Abreu da Rosa
Microscopy Research and Technique.2023; 86(12): 1635. CrossRef
Influence of different kinematics on stationary and dynamic torsional behavior of JIZAI nickel-titanium rotary instruments: An in vitro study
Myint Thu, Arata Ebihara, Moe Sandar Kyaw, Satoshi Omori, Keiichiro Maki, Shunsuke Kimura, Hayate Unno, Takashi Okiji
Journal of Dental Sciences.2023; 18(3): 1170. CrossRef
Dynamic torque and screw-in force of four different glide path instruments assessed in simulated single- and double-curved canals: An in vitro study
Myint Thu, Arata Ebihara, Keiichiro Maki, Shunsuke Kimura, Moe-Sandar Kyaw, Yuka Kasuga, Miki Nishijo, Takashi Okiji
Journal of Dental Sciences.2023; 18(4): 1598. CrossRef
Effect of Periodic Changes in Rotation Speed on Torsional Stress and Screw-in Force by Alternative Rotation Technique
Jung-Hong Ha, Hyo-Jin Jo, Sang Won Kwak, Asgeir Sigurdsson, Hyeon-Cheol Kim
Journal of Endodontics.2023; 49(1): 77. CrossRef
Effect of Rotational Modes on Torque/Force Generation and Canal Centering Ability during Rotary Root Canal Instrumentation with Differently Heat-Treated Nickel–Titanium Instruments
Satoshi Omori, Arata Ebihara, Keiko Hirano, Yuka Kasuga, Hayate Unno, Taro Nakatsukasa, Shunsuke Kimura, Keiichiro Maki, Takao Hanawa, Takashi Okiji
Materials.2022; 15(19): 6850. CrossRef
Shaping ability of rotary and reciprocating single-file systems in combination with and without different glide path techniques in simulated curved canals
Lu Shi, Yunfei Yang, Jie Wan, Wen Xie, Ruiming Yang, Ying Yao
Journal of Dental Sciences.2022; 17(4): 1520. CrossRef
Evolution and development: engine-driven endodontic rotary nickel-titanium instruments
Yuhong Liang, Lin Yue
International Journal of Oral Science.2022;[Epub] CrossRef
Comparison of the effects from coronal pre‐flaring and glide‐path preparation on torque generation during root canal shaping procedure
Sang Won Kwak, Jung‐Hong Ha, Ya Shen, Markus Haapasalo, Hyeon‐Cheol Kim
Australian Endodontic Journal.2022; 48(1): 131. CrossRef
Shaping ability of ProTaper Gold and WaveOne Gold nickel-titanium rotary instruments in simulated S-shaped root canals
Lu Shi, Junling Zhou, Jie Wan, Yunfei Yang
Journal of Dental Sciences.2022; 17(1): 430. CrossRef
Endodontic Rotary Files, What Should an Endodontist Know?
Ana-Belén Dablanca-Blanco, Pablo Castelo-Baz, Ramón Miguéns-Vila, Pablo Álvarez-Novoa, Benjamín Martín-Biedma
Medicina.2022; 58(6): 719. CrossRef
Present status and future directions: Canal shaping
Ana Arias, Ove A. Peters
International Endodontic Journal.2022; 55(S3): 637. CrossRef
Comparison of Torque, Screw-in Force, and Shaping Ability of Glide Path Instruments in Continuous Rotation and Optimum Glide Path Motion
Pyae Hein Htun, Arata Ebihara, Keiichiro Maki, Shunsuke Kimura, Miki Nishijo, Moe Sandar Kyaw, Takashi Okiji
Journal of Endodontics.2021; 47(1): 94. CrossRef
Analysis of Torque and Force Induced by Rotary Nickel-Titanium Instruments during Root Canal Preparation: A Systematic Review
Myint Thu, Arata Ebihara, Sherif Adel, Takashi Okiji
Applied Sciences.2021; 11(7): 3079. CrossRef
Comparison of canal transportation and centering ability of manual K-files and reciprocating files in glide path preparation: a micro-computed tomography study of constricted canals
Jing-Yi Liu, Zhi-Xiong Zhou, Wei-Ju Tseng, Bekir Karabucak
BMC Oral Health.2021;[Epub] CrossRef
Influence of rotational speed on torque/force generation and shaping ability during root canal instrumentation of extracted teeth with continuous rotation and optimum torque reverse motion
M. S. Kyaw, A. Ebihara, Y. Kasuga, K. Maki, S. Kimura, P. H. Htun, T. Nakatsukasa, T. Okiji
International Endodontic Journal.2021; 54(9): 1614. CrossRef
Shot peening increases resistance to cyclic fatigue fracture of endodontic files
Javier Nino-Barrera, Jose Sanchez-Aleman, Manuel Acosta-Humanez, Luis Gamboa-Martinez, Carlos Cortes-Rodriguez
Scientific Reports.2021;[Epub] CrossRef
Optimum glide path motion is safer than continuous rotation of files in glide path preparation
Giulio Gavini, Eduardo Akisue, Dirce Akemi Sacaguti Kawakami, Celso Luiz Caldeira, George Táccio de Miranda Candeiro, Rodrigo Ricci Vivan, Pedro Henrique Souza Calefi, Murilo Priori Alcalde, Marco Antonio Húngaro Duarte
Australian Endodontic Journal.2021; 47(3): 544. CrossRef
Root canals shaped by nickel-titanium instrumentation with automated computerized numerical control systems
Liming Wang, Wenxiang Li, Yeon-Jee Yoo, Shin Hye Chung, Soram Oh, Hiran Perinpanayagam, Kee-Yeon Kum, Yu Gu
BMC Oral Health.2021;[Epub] CrossRef
An Update on Nickel-Titanium Rotary Instruments in Endodontics: Mechanical Characteristics, Testing and Future Perspective—An Overview
Alessio Zanza, Maurilio D’Angelo, Rodolfo Reda, Gianluca Gambarini, Luca Testarelli, Dario Di Nardo
Bioengineering.2021; 8(12): 218. CrossRef
Comparative Evaluation of Cleaning Efficiency and Apical Extrusion of Debris Using Two Pediatric Rotary Endodontic Files: An In Vitro Study
Nilima Thosar, Sudhindra Baliga, Faraz Ahmed, Nilesh Rathi, Shreyans A Jain, Jayati Mehta
International Journal of Clinical Pediatric Dentistry.2021; 14(2): 196. CrossRef
Body temperature fatigue behaviour of reciprocating and rotary glide path instruments in sodium hypochlorite solutions alone or combined with etidronate
Dario Perez‐Villalba, José C. Macorra, Juan J. Perez‐Higueras, Ove A. Peters, Ana Arias
Australian Endodontic Journal.2021; 47(3): 450. CrossRef
Effect of Optimum Torque Reverse Motion on Torque and Force Generation during Root Canal Instrumentation with Crown-down and Single-length Techniques
Shunsuke Kimura, Arata Ebihara, Keiichiro Maki, Miki Nishijo, Daisuke Tokita, Takashi Okiji
Journal of Endodontics.2020; 46(2): 232. CrossRef
Ex-Vivo Comparison of Torsional Stress on Nickel–Titanium Instruments Activated by Continuous Rotation or Adaptive Motion
Joo Yeong Lee, Sang Won Kwak, Jung-Hong Ha, Hyeon-Cheol Kim
Materials.2020; 13(8): 1900. CrossRef
Influence of glide path size and operating kinetics on time to reach working length and fracture resistance of Twisted File adaptive and Endostar E3 nickel-titanium file systems
Tamilkumaran Ramyadharshini, Inbaraj Anand Sherwood, V Shanmugham Vigneshwar, Prakasam Ernest Prince, Murugadoss Vaanjay
Restorative Dentistry & Endodontics.2020;[Epub] CrossRef
Buckling Resistance of Various Nickel-Titanium Glide Path Preparation Instruments in Dynamic or Static Mode
Jung-Hong Ha, Sang Won Kwak, Antheunis Versluis, Hyeon-Cheol Kim
Journal of Endodontics.2020; 46(8): 1125. CrossRef
Comparison of torque, force generation and canal shaping ability between manual and nickel-titanium glide path instruments in rotary and optimum glide path motion
Pyae Hein Htun, Arata Ebihara, Keiichiro Maki, Shunsuke Kimura, Miki Nishijo, Daisuke Tokita, Takashi Okiji
Odontology.2020; 108(2): 188. CrossRef
THE INFLUENCE OF DIFFERENT TORQUE SETTINGS ON THE AMOUNT OF APICALLY EXTRUDED DEBRIS DURING ROTARY INSTRUMENTATION
Demet ALTUNBAŞ, Mustafa TOYOĞLU
Cumhuriyet Dental Journal.2020; 23(3): 160. CrossRef
Glide Path: “Path to the successful root canal instrumentation”- Review
Anjali Mairal Oak
Journal of Indian Dental Association.2020;[Epub] CrossRef
Torsional fatigue strength of reciprocating and rotary pathfinding instruments manufactured from different NiTi alloys
Rodrigo Ricci VIVAN, Murilo Priori ALCALDE, George CANDEIRO, Giulio GAVINI, Celso Luis CALDEIRA, Marco Antonio Hungaro DUARTE
Brazilian Oral Research.2019;[Epub] CrossRef
Comparison of Screw-In Forces during Movement of Endodontic Files with Different Geometries, Alloys, and Kinetics
Sang Won Kwak, Chan-Joo Lee, Sung Kyo Kim, Hyeon-Cheol Kim, Jung-Hong Ha
Materials.2019; 12(9): 1506. CrossRef
Effect of glide path preparation with PathFile and ProGlider on the cyclic fatigue resistance of WaveOne nickel-titanium files
Gülşah Uslu, Uğur İnan
Restorative Dentistry & Endodontics.2019;[Epub] CrossRef
Force and vibration generated in apical direction by three endodontic files of different kinematics during simulated canal preparation: An in vitro analytical study
Ankit Nayak, PK Kankar, Prashant K Jain, Niharika Jain
Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine.2019; 233(8): 839. CrossRef
Effective Establishment of Glide-Path to Reduce Torsional Stress during Nickel-Titanium Rotary Instrumentation
Ibrahim H. Abu-Tahun, Sang Won Kwak, Jung-Hong Ha, Asgeir Sigurdsson, Mehmet Baybora Kayahan, Hyeon-Cheol Kim
Materials.2019; 12(3): 493. CrossRef
Real‐time dynamic torque values and axial forces during preparation of straight root canals using three different endodontic motors and hand preparation
S. Bürklein, J. P. Stüber, E. Schäfer
International Endodontic Journal.2019; 52(1): 94. CrossRef
Comparison of glide paths created with K-files, PathFiles, and the ProGlider file, and their effects on subsequent WaveOne preparation in curved canals
Linxia Zheng, Xiongfei Ji, Chengxi Li, Lulu Zuo, Xin Wei
BMC Oral Health.2018;[Epub] CrossRef
Comparison of cyclic fatigue resistance and bending properties of two reciprocating nickel‐titanium glide path files
T. Özyürek, G. Uslu, M. Gündoğar, K. Yılmaz, N. M. Grande, G. Plotino
International Endodontic Journal.2018; 51(9): 1047. CrossRef
Root Canal Shaping Effect of Instruments with Offset Mass of Rotation in the Mandibular First Molar: A Micro–computed Tomographic Study
Maung Maung Kyaw Moe, Jung Hong Ha, Myoung Uk Jin, Young Kyung Kim, Sung Kyo Kim
Journal of Endodontics.2018; 44(5): 822. CrossRef
Evaluation of selected mechanical properties of NiTi rotary glide path files manufactured from controlled memory wires
Miki NISHIJO, Arata EBIHARA, Daisuke TOKITA, Hisashi DOI, Takao HANAWA, Takashi OKIJI
Dental Materials Journal.2018; 37(4): 549. CrossRef
Effect of the Glide Path Establishment on the Torque Generation to the Files during Instrumentation: An In Vitro Measurement
Sang Won Kwak, Jung-Hong Ha, Gary Shun-Pan Cheung, Hyeon-Cheol Kim, Sung Kyo Kim
Journal of Endodontics.2018; 44(3): 496. CrossRef
Cyclic Fatigue Resistance of Novel Glide Path Instruments with Different Alloy Properties and Kinematics
Burcu Serefoglu, Mehmet Emin Kaval, Seniha Micoogullari Kurt, Mehmet Kemal Çalişkan
Journal of Endodontics.2018; 44(9): 1422. CrossRef
Cyclic fatigue resistance of R‐Pilot, HyFlex EDM and PathFile nickel‐titanium glide path files in artificial canals with double (S‐shaped) curvature
G. Uslu, T. Özyürek, K. Yılmaz, M. Gündoğar
International Endodontic Journal.2018; 51(5): 584. CrossRef
A Comparison of the Cyclic Fatigue Resistance of Used and New Glide Path Files
Taha Özyürek, Gülşah Uslu, Uğur İnan
Journal of Endodontics.2017; 43(3): 477. CrossRef
Comparison of apical extrusion of intracanal bacteria by various glide-path establishing systems: an in vitro study
Alberto Dagna, Rashid El Abed, Sameeha Hussain, Ibrahim H Abu-Tahun, Livia Visai, Federico Bertoglio, Floriana Bosco, Riccardo Beltrami, Claudio Poggio, Hyeon-Cheol Kim
Restorative Dentistry & Endodontics.2017; 42(4): 316. CrossRef
Comparing the Centering Ability of Different Pathfinding Systems and Their Effect on Final Instrumentation by Hyflex CM
Lu Shi, Shova Wagle
Journal of Endodontics.2017; 43(11): 1868. CrossRef
Torsional Performance of ProTaper Gold Rotary Instruments during Shaping of Small Root Canals after 2 Different Glide Path Preparations
Ana Arias, Rafaela Andrade de Vasconcelos, Alexis Hernández, Ove A. Peters
Journal of Endodontics.2017; 43(3): 447. CrossRef
Dynamic Torque and Vertical Force Analysis during Nickel-titanium Rotary Root Canal Preparation with Different Modes of Reciprocal Rotation
Daisuke Tokita, Arata Ebihara, Miki Nishijo, Kana Miyara, Takashi Okiji
Journal of Endodontics.2017; 43(10): 1706. CrossRef
Stress Generation during Pecking Motion of Rotary Nickel-titanium Instruments with Different Pecking Depth
Jung-Hong Ha, Sang Won Kwak, Asgeir Sigurdsson, Seok Woo Chang, Sung Kyo Kim, Hyeon-Cheol Kim
Journal of Endodontics.2017; 43(10): 1688. CrossRef
In vitro comparison of the cyclic fatigue resistance of HyFlex EDM, One G, and ProGlider nickel titanium glide path instruments in single and double curvature canals
Koray Yılmaz, Gülşah Uslu, Taha Özyürek
Restorative Dentistry & Endodontics.2017; 42(4): 282. CrossRef
Debris extrusion by glide-path establishing endodontic instruments with different geometries
Jung-Hong Ha, Sung Kyo Kim, Sang Won Kwak, Rashid El Abed, Yong Chul Bae, Hyeon-Cheol Kim
Journal of Dental Sciences.2016; 11(2): 136. CrossRef
Effects of Pitch Length and Heat Treatment on the Mechanical Properties of the Glide Path Preparation Instruments
Sang Won Kwak, Jung-Hong Ha, Chan-Joo Lee, Rashid El Abed, Ibrahim H. Abu-Tahun, Hyeon-Cheol Kim
Journal of Endodontics.2016; 42(5): 788. CrossRef
Screw-in forces during instrumentation by various file systems
Jung-Hong Ha, Sang Won Kwak, Sung-Kyo Kim, Hyeon-Cheol Kim
Restorative Dentistry & Endodontics.2016; 41(4): 304. CrossRef
Cyclic Fatigue Resistance and Force Generated by OneShape Instruments during Curved Canal Preparation
Zhuyu Wang, Wen Zhang, Xiaolei Zhang, Luigi F. Rodella
PLOS ONE.2016; 11(8): e0160815. CrossRef
Differences in torsional performance of single- and multiple-instrument rotary systems for glide path preparation
Ana Arias, Rupinderpal Singh, Ove A. Peters
Odontology.2016; 104(2): 192. CrossRef
Effect of glide path and apical preparation size on the incidence of apical crack during the canal preparation using Reciproc, WaveOne, and ProTaper Next systems in curved root canals: A stereomicroscope study
Hüseyin Sinan Topçuoğlu, Salih Düzgün, Firdevs Akpek, Gamze Topçuoğlu
Scanning.2016; 38(6): 585. CrossRef
Geometric Optimization for Development of Glide Path Preparation Nickel-Titanium Rotary Instrument
Jung-Hong Ha, Chan-Joo Lee, Sang-Won Kwak, Rashid El Abed, Dongseok Ha, Hyeon-Cheol Kim
Journal of Endodontics.2015; 41(6): 916. CrossRef
Glide Path Management with Single- and Multiple-instrument Rotary Systems in Curved Canals: A Micro–Computed Tomographic Study
Alison Luís Kirchhoff, Rene Chu, Isabel Mello, Andres Dario Plazas Garzon, Marcelo dos Santos, Rodrigo Sanches Cunha
Journal of Endodontics.2015; 41(11): 1880. CrossRef
Safe root canal preparation using reciprocating nickel-titanium instruments
Jung-Hong Ha
Restorative Dentistry & Endodontics.2015; 40(3): 253. CrossRef
Effect of repetitive pecking at working length for glide path preparation using G-file
Jung-Hong Ha, Hyo-Jin Jeon, Rashid El Abed, Seok-Woo Chang, Sung-Kyo Kim, Hyeon-Cheol Kim
Restorative Dentistry & Endodontics.2015; 40(2): 123. CrossRef
Influence of a glide path on the dentinal crack formation of ProTaper Next system
Sevinç Aktemur Türker, Emel Uzunoğlu
Restorative Dentistry & Endodontics.2015; 40(4): 286. CrossRef
‘Screw‐in’ tendency of rotary nickel–titanium files due to design geometry
J. H. Ha, G. S. P. Cheung, A. Versluis, C. J. Lee, S. W. Kwak, H. C. Kim
International Endodontic Journal.2015; 48(7): 666. CrossRef
Comparison of the Cyclic Fatigue Resistance of 5 Different Rotary Pathfinding Instruments Made of Conventional Nickel-Titanium Wire, M-wire, and Controlled Memory Wire
Ismail Davut Capar, Mehmet Emin Kaval, Hüseyin Ertas, Bilge Hakan Sen
Journal of Endodontics.2015; 41(4): 535. CrossRef
Comparision of two different preparation protocol of Ni-Ti Rotary PathFile-ProTaper instruments in simulated s-shaped canals
Elıf Delve Başer Can, Müzeyyen Gerek, Mehmet Baybora Kayahan, Kambız Mohsenı, Hakki Sunay, Gündüz Bayirli
Acta Odontologica Scandinavica.2014; 72(1): 76. CrossRef
Torsional and cyclic fatigue resistances of glide path preparation instruments: G‐file and PathFile
Sang Yup Sung, Jung‐Hong Ha, Sang‐Won Kwak, Rashid El Abed, Kyeongmin Byeon, Hyeon‐Cheol Kim
Scanning.2014; 36(5): 500. CrossRef
Buckling resistance, bending stiffness, and torsional resistance of various instruments for canal exploration and glide path preparation
Sang-Won Kwak, Jung-Hong Ha, WooCheol Lee, Sung-Kyo Kim, Hyeon-Cheol Kim
Restorative Dentistry & Endodontics.2014; 39(4): 270. CrossRef
Shaping Ability of Different Nickel-Titanium Systems in Simulated S-shaped Canals with and without Glide Path
Sebastian Bürklein, Thomas Poschmann, Edgar Schäfer
Journal of Endodontics.2014; 40(8): 1231. CrossRef
Stress Generation during Self-Adjusting File Movement: Minimally Invasive Instrumentation
Hyeon-Cheol Kim, Sang Yup Sung, Jung-Hong Ha, Michael Solomonov, Jung-Min Lee, Chan-Joo Lee, Byung-Min Kim
Journal of Endodontics.2013; 39(12): 1572. CrossRef

333 View
2 Download
74 Crossref

A survey of experience-based preference of Nickel-Titanium rotary files and incidence of fracture among general dentists: WooCheol Lee, Minju Song, Euiseong Kim, Hyojin Lee, Hyeon-Cheol Kim; Restor Dent Endod 2012;37(4):201-206. Published online November 21, 2012; DOI: https://doi.org/10.5395/rde.2012.37.4.201

Abstract PDF PubReader ePub

Objectives

The purpose was to investigate the preference and usage technique of NiTi rotary instruments and to retrieve data on the frequency of re-use and the estimated incidence of file separation in the clinical practice among general dentists.

Materials and Methods

A survey was disseminated via e-mail and on-site to 673 general dentists. The correlation between the operator's experience or preferred technique and frequency of re-use or incidence of file fracture was assessed.

Results

A total of 348 dentists (51.7%) responded. The most frequently used NiTi instruments was ProFile (39.8%) followed by ProTaper. The most preferred preparation technique was crown-down (44.6%). 54.3% of the respondents re-used NiTi files more than 10 times. There was a significant correlation between experience with NiTi files and the number of reuses (p = 0.0025). 54.6% of the respondents estimated experiencing file separation less than 5 times per year. The frequency of separation was significantly correlated with the instrumentation technique (p = 0.0003).

Conclusions

A large number of general dentists in Korea prefer to re-use NiTi rotary files. As their experience with NiTi files increased, the number of re-uses increased, while the frequency of breakage decreased. Operators who adopt the hybrid technique showed less tendency of separation even with the increased number of re-use.

Citations

Citations to this article as recorded by

Adoption of rotary instrumentation among general practitioners in Qassim region, Saudi Arabia: A cross-sectional survey
Badi B. Alotaibi
Saudi Endodontic Journal.2024; 14(2): 181. CrossRef
Undergraduate Endodontic Training and Its Relation to Contemporary Practice: Multicenter Cross-Sectional Study in Saudi Arabia
Fahda N. Algahtani, Reem M. Barakat, Lujain M. Alqarni, Alanoud F. Alqabbani, Manal F. Alkadi, Rahaf A. Almohareb, André Luiz Ferreira Costa
International Journal of Clinical Practice.2023; 2023: 1. CrossRef
Fracture Incidence of Kedo-S Square Pediatric Rotary Files: A Prospective Clinical Study
Lakshimi Lakshmanan, Ganesh Jeevanandan, Prabhadevi C Maganur, Satish Vishwanathaiah
European Journal of Dentistry.2022; 16(03): 594. CrossRef
Prevention and management of fractured instruments in endodontic treatment
Wei-Rong Tang
World Journal of Surgical Procedures.2015; 5(1): 82. CrossRef
Influence of operator's experience level on lifespan of the WaveOne Primary file in extracted teeth
Abdulrahman Mohammed Saleh, Saeid Tavanafar, Pouyan Vakili-Gilani, Noor Jamal Al Sammerraie, Faahim Rashid
Restorative Dentistry & Endodontics.2013; 38(4): 222. CrossRef

239 View
4 Download
5 Crossref

Basic Researchs

Influence of taper on the screw-in effect of nickel-titanium rotary files in simulated resin root canal: Hye-Jin Sung, Jung-Hong Ha, Sung-Kyo Kim; J Korean Acad Conserv Dent 2010;35(5):380-386. Published online September 30, 2010; DOI: https://doi.org/10.5395/JKACD.2010.35.5.380

Abstract PDF PubReader ePub

Objectives

The introduction of nickel-titanium alloy endodontic instruments has greatly simplified shaping the root canal systems. However, these new instruments have several unexpected disadvantages. One of these is tendency to screw into the canal. In this study, the influence of taper on the screw-in effect of the Ni-Ti rotary instrument were evaluated.

Materials and Methods

A total of 20 simulated root canals with an S-shaped curvature in clear resin blocks were divided into two groups. ProFile .02, .04, .06 (Dentsply-Maillefer) and GT rotary files .08, .10, .12 (Dentsply) were used in Profile group, and K3 .04, .06, .08, .10, and .12 (SybronEndo, Glendora) were used in K3 group. Files were used with a single pecking motion at a constant speed of 300 rpm. A special device was made to measure the force of screw-in effect. A dynamometer of the device recorded the screw-in force during simulated canal preparation and the recorded data was stored in computer with designed software. The data were subjected to one-way ANOVA and Tukey's multiple range test for post-hoc test. p value of less than 0.05 was regarded significant.

Results

The more tapered instruments generated more screw-in forces in Profile group (p < 0.05). In K3 group, 0.08, 0.10. and 0.12 tapered instruments showed more screw-in force than 0.04 tapered one, and 0.08 and 0.12 tapered instruments showed more screw-in force than 0.06 tapered one (p < 0.05).

Conclusions

The more tapered instruments seems to produce more screw-in force. To avoid this screw-in force during instrumentation, more attention may be needed when using more tapered instruments.

Citations

Citations to this article as recorded by

Analysis of Torque and Force Induced by Rotary Nickel-Titanium Instruments during Root Canal Preparation: A Systematic Review
Myint Thu, Arata Ebihara, Sherif Adel, Takashi Okiji
Applied Sciences.2021; 11(7): 3079. CrossRef
Comparative analysis of mechanical properties of differently tapered nickeltitanium endodontic rotary instruments
Yohei FUKUMORI, Miki NISHIJYO, Daisuke TOKITA, Kana MIYARA, Arata EBIHARA, Takashi OKIJI
Dental Materials Journal.2018; 37(4): 667. CrossRef
Influence of glide path on the screw-in effect and torque of nickel-titanium rotary files in simulated resin root canals
Jung-Hong Ha, Sang-Shin Park
Restorative Dentistry & Endodontics.2012; 37(4): 215. CrossRef
Mechanical and geometric features of endodontic instruments and its clinical effect
Hyeon-Cheol Kim
Journal of Korean Academy of Conservative Dentistry.2011; 36(1): 1. CrossRef

295 View
4 Download
4 Crossref

Influence of root canal curvature on the screw-in effect of nickel-titanium rotary files in simulated resin root canal: Ji-Young Son, Jung-Hong Ha, Young-Kyung Kim; J Korean Acad Conserv Dent 2010;35(5):374-379. Published online September 30, 2010; DOI: https://doi.org/10.5395/JKACD.2010.35.5.374

Abstract PDF PubReader ePub

Objectives

Nickel-titanium (Ni-Ti) rotary instruments have some unexpected disadvantages including the tendency to screw-in to the canal. The purpose of this study was to evaluate the influence of root canal curvatures on the screw-in effect of Ni-Ti rotary files.

Materials and Methods

A total of 80 simulated root canals in clear resin blocks were used in the study. Canals with curvature of 0, 10, 20 and 30 degrees were instrumented with ProTaper instruments SX, S1, S2 and a ProFile of #25/0.06 to 1.0-2.0 mm beyond the initial point of root curvature. The screw-in force was measured with a specially designed device while canal was instrumented with a ProFile of #30/0.06 at a constant speed of 300 rpm. The data were subjected to one-way ANOVA and Scheffe multiple range test for post-hoc test.

Results

Larger degree of canal curvature generated significantly lesser screw-in forces in all groups (p < 0.001).

Conclusions

More attention needs to be paid when using rotary instruments in canals with less curvature than canals with more curvatures to prevent or reduce any accidental overinstrumentation.

Citations

Citations to this article as recorded by

Influence of different kinematics on stationary and dynamic torsional behavior of JIZAI nickel-titanium rotary instruments: An in vitro study
Myint Thu, Arata Ebihara, Moe Sandar Kyaw, Satoshi Omori, Keiichiro Maki, Shunsuke Kimura, Hayate Unno, Takashi Okiji
Journal of Dental Sciences.2023; 18(3): 1170. CrossRef
Analysis of Torque and Force Induced by Rotary Nickel-Titanium Instruments during Root Canal Preparation: A Systematic Review
Myint Thu, Arata Ebihara, Sherif Adel, Takashi Okiji
Applied Sciences.2021; 11(7): 3079. CrossRef
Mechanical and geometric features of endodontic instruments and its clinical effect
Hyeon-Cheol Kim
Journal of Korean Academy of Conservative Dentistry.2011; 36(1): 1. CrossRef

151 View
1 Download
3 Crossref

Comparison of screw-in effect for several nickel-titanium rotary instruments in simulated resin root canal: Jung-Hong Ha, Myoung-Uk Jin, Young-Kyung Kim, Sung-Kyo Kim; J Korean Acad Conserv Dent 2010;35(4):267-272. Published online July 31, 2010; DOI: https://doi.org/10.5395/JKACD.2010.35.4.267

Abstract PDF PubReader ePub

Screw-in effect is one of the unintended phenomena that occurs during the root canal preparation with nickel-titanium rotary files. The aim of this study was to compare the screw-in effect among various nickel-titanium rotary file systems.

Six different nickel-titanium rotary instruments (ISO 20/.06 taper) were used: K3™ (SybronEndo, Glendora, CA, USA), M_two (VDW GmbH, München, Germany), NRT with safe-tip and with active tip (Mani Inc., Shioya-gun, Japan), ProFile® (Dentsply-Maillefer, Ballaigues, Switzerland) and ProTaper® (Dentsply-Maillefer, Ballaigues, Switzerland). For ProTaper®, S2 was selected because it has size 20. Root canal instrumentations were done in sixty simulated single-curved resin root canals with a rotational speed of 300 rpm and single pecking motion. A special device was designed to measure the force of screw-in effect. A dynamometer of the device recorded the screw-in force during simulated canal preparation and the recorded data was stored in a computer with designed software (LCV-USE-VS, Lorenz Messtechnik GmbH, Alfdorf, Germany). The data were subjected to one-way ANOVA and Tukey's multiple range test for post-hoc test. P value of less than 0.05 was regarded significant.

ProTaper® produced significantly more screw-in effects than any other instruments in the study (p < 0.001). K3™ produced significantly more screw-in effects than M_two, and ProFile® (p < 0.001). There was no significant difference among M_two, NRT, and ProFile® (p > 0.05), and between NRT with active tip and NRT with safe one neither (p > 0.05).

From the result of the present study, it was concluded, therefore, that there seems significant differences of screw-in effect among the tested nickel-titanium rotary instruments. The radial lands and rake angle of nickel-titanium rotary instrument might be the cause of the difference.

Citations

Citations to this article as recorded by

Impact of Radial Lands on the Reduction of Torque/Force Generation of a Heat-Treated Nickel-Titanium Rotary Instrument
Taro Nakatsukasa, Arata Ebihara, Moe Sandar Kyaw, Satoshi Omori, Hayate Unno, Shunsuke Kimura, Keiichiro Maki, Takashi Okiji
Applied Sciences.2022; 12(5): 2620. CrossRef
Comparative evaluation of mechanical properties and shaping performance of heat-treated nickel titanium rotary instruments used in the single-length technique
Taro NAKATSUKASA, Arata EBIHARA, Shunsuke KIMURA, Keiichiro MAKI, Miki NISHIJO, Daisuke TOKITA, Takashi OKIJI
Dental Materials Journal.2021; 40(3): 743. CrossRef
Analysis of Torque and Force Induced by Rotary Nickel-Titanium Instruments during Root Canal Preparation: A Systematic Review
Myint Thu, Arata Ebihara, Sherif Adel, Takashi Okiji
Applied Sciences.2021; 11(7): 3079. CrossRef
Influence of rotational speed on torque/force generation and shaping ability during root canal instrumentation of extracted teeth with continuous rotation and optimum torque reverse motion
M. S. Kyaw, A. Ebihara, Y. Kasuga, K. Maki, S. Kimura, P. H. Htun, T. Nakatsukasa, T. Okiji
International Endodontic Journal.2021; 54(9): 1614. CrossRef
Influence of glide path on the screw-in effect and torque of nickel-titanium rotary files in simulated resin root canals
Jung-Hong Ha, Sang-Shin Park
Restorative Dentistry & Endodontics.2012; 37(4): 215. CrossRef
Influence of root canal curvature on the screw-in effect of nickel-titanium rotary files in simulated resin root canal
Ji-Young Son, Jung-Hong Ha, Young-Kyung Kim
Journal of Korean Academy of Conservative Dentistry.2010; 35(5): 374. CrossRef
Influence of taper on the screw-in effect of nickel-titanium rotary files in simulated resin root canal
Hye-Jin Sung, Jung-Hong Ha, Sung-Kyo Kim
Journal of Korean Academy of Conservative Dentistry.2010; 35(5): 380. CrossRef

193 View
3 Download
7 Crossref

Original Articles

Effects of anticurvature filing on danger zone width in curved root canals: Eui Seong Kim, Hyun Jung Kim, Deog Gyu Seo, Byoung Duck Roh; J Korean Acad Conserv Dent 2009;34(3):232-239. Published online May 31, 2009; DOI: https://doi.org/10.5395/JKACD.2009.34.3.232

Abstract PDF PubReader ePub

The aim of this study was to compare the effects of anticurvature filing with stainless steel k-file versus nickel-titanium ProFile in the shaping of mesial root canals of extracted mandibular molars.

A total of 60 canals from 30 mesial roots of mandibular molar teeth were randomly assigned to three groups with n=20 each. They were prepared with different instruments and methods: The first group with stainless steel k-file and circumferential filing, the second with precurved stainless steel k-file and anticurvature filing and the third with ProFile (.06 taper) and anticurvature filing. Using a micro-computed tomography system (skyscan-1076, SKYSCAN, Antwerpen, Belgium), pre-and post-operative specimens were scanned. Subsequently, canal images were superimposed and changes in root dentin thickness were measured at distal side (danger zone) of the canal. The data was analyzed using a one-way ANOVA and the comparison of means was conducted using a post hoc multiple comparison Tukey test.

There were significant differences in the change of root dentin thickness at the 7.5~8.5mm level between group 1 and 2, 3.5~6mm level between group 1 and 3 and 3.5~6mm level between group 2 and 3(n=20, P<0.05).

157 View
2 Download

Stress distribution for NiTi files of triangular based and rectangular based cross-sections using 3-dimensional finite element analysis: Hyun-Ju Kim, Chan-Joo Lee, Byung-Min Kim, Jeong-Kil Park, Bock Hur, Hyeon-Cheol Kim; J Korean Acad Conserv Dent 2009;34(1):1-7. Published online January 31, 2009; DOI: https://doi.org/10.5395/JKACD.2009.34.1.001

Abstract PDF PubReader ePub

The purpose of this study was to compare the stress distributions of NiTi rotary instruments based on their cross-sectional geometries of triangular shape-based cross-sectional design, S-shaped cross-sectional design and modified rectangular shape-based one using 3D FE models.

NiTi rotary files of S-shaped and modified rectangular design of cross-section such as Mtwo or NRT showed larger stress change while file rotation during simulated shaping.

The stress of files with rectangular cross-section design such as Mtwo, NRT was distributed as an intermittent pattern along the long axis of file. On the other hand, the stress of files with triangular cross-section design was distributed continuously.

When the residual stresses which could increase the risk of file fatigue fracture were analyzed after their withdrawal, the NRT and Mtwo model also presented higher residual stresses.

From this result, it can be inferred that S-shaped and modified rectangular shape-based files were more susceptible to file fracture than the files having triangular shape-based one.

Citations

Citations to this article as recorded by

Ex-Vivo Comparison of Torsional Stress on Nickel–Titanium Instruments Activated by Continuous Rotation or Adaptive Motion
Joo Yeong Lee, Sang Won Kwak, Jung-Hong Ha, Hyeon-Cheol Kim
Materials.2020; 13(8): 1900. CrossRef
Autogenous teeth used for bone grafting: a comparison with traditional grafting materials
Young-Kyun Kim, Su-Gwan Kim, Pil-Young Yun, In-Sung Yeo, Seung-Chan Jin, Ji-Su Oh, Heung-Joong Kim, Sun-Kyoung Yu, Sook-Young Lee, Jae-Sung Kim, In-Woong Um, Mi-Ae Jeong, Gyung-Wook Kim
Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology.2014; 117(1): e39. CrossRef
Analysis of crystalline structure of autogenous tooth bone graft material: X-Ray diffraction analysis
Gyung-Wook Kim, In-Sung Yeo, Su-Gwan Kim, In-Woong Um, Young-Kyun Kim
Journal of the Korean Association of Oral and Maxillofacial Surgeons.2011; 37(3): 225. CrossRef

172 View
4 Download
3 Crossref

First
Prev
Page of 2
Next
Last

Search