Restorative Dentistry & Endodontics

Research Articles

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; Restor Dent Endod 2020;45(3):e30. Published online May 22, 2020; DOI: https://doi.org/10.5395/rde.2020.45.e30

Objectives

This micro-computed tomographic (CT) study aimed to compare the shaping abilities of ProTaper Next (PTN), One Shape (OS), and One Curve (OC) files in 3-dimensionally (3D)-printed mandibular molars.

Materials and Methods

In order to ensure standardization, 3D-printed mandibular molars with a consistent mesiobuccal canal curvature (45°) were used in the present study (n = 18). Specimens were instrumented with the OC, OS, or PTN files. The teeth were scanned pre- and post-instrumentation using micro-CT to detect changes of the canal volume and surface area, as well as to quantify transportation of the canals after instrumentation. Two-way analysis of variance was used for statistical comparisons.

Results

No statistically significant differences were found between the OC and OS groups in the changes of the canal volume and surface area before and after instrumentation (p > 0.05). The OC files showed significantly less transportation than the OS or PTN systems for the apical section (p < 0.05). In a comparison of the systems, similar values were found at the coronal and middle levels, without any significant differences (p > 0.05).

Conclusions

These 3 instrumentation systems showed similar shaping abilities, although the OC file achieved a lesser extent of transportation in the apical zone than the OS and PTN files. All 3 file systems were confirmed to be safe for use in mandibular mesial canals.

Citations

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A Comparative Evaluation of the Efficiencies of Different Rotary File Systems in Terms of Remaining Dentin Thickness Using Cone Beam Computed Tomography: An In Vitro Study
Vivek P Vadera , Sandhya K Punia, Saleem D Makandar, Rahul Bhargava, Pradeep Bapna
Cureus.2024;[Epub] CrossRef
Comparison of Different Rotary Nickel–titanium Systems to Evaluate Coronal Leakage of Root Canals: An in Vitro Study
Rasha M. Al-Shamaa
Dental Hypotheses.2023; 14(3): 81. CrossRef
Comparative evaluation of canal transportation and canal centering ability in oval canals with newer nickel–titanium rotary single file systems – A cone-beam computed tomography study
SimarKaur Manocha, SuparnaGanguly Saha, RollyS Agarwal, Neelam Vijaywargiya, MainakKanti Saha, Anjali Surana
Journal of Conservative Dentistry.2023; 26(3): 326. CrossRef
Accumulated Hard Tissue Debris and Root Canal Shaping Profiles Following Instrumentation with Gentlefile, One Curve, and Reciproc Blue
Chi Wai Chan, Virginia Rosy Romeo, Angeline Lee, Chengfei Zhang, Prasanna Neelakantan, Eugenio Pedullà
Journal of Endodontics.2023; 49(10): 1344. CrossRef
Comparative evaluation of canal transportation and centering ability of rotary and reciprocating file systems using cone-beam computed tomography: An in vitro study
Tanisha Singh, Manju Kumari, Rohit Kochhar
Journal of Conservative Dentistry.2023; 26(3): 332. CrossRef
Retreatability of Bioceramic Sealer Using One Curve Rotary File Assessed by Microcomputed Tomography
Dina G Mufti, Saad A Al-Nazhan
The Journal of Contemporary Dental Practice.2022; 22(10): 1175. CrossRef
Micro-computed tomography in preventive and restorative dental research: A review
Mehrsima Ghavami-Lahiji, Reza Tayefeh Davalloo, Gelareh Tajziehchi, Paria Shams
Imaging Science in Dentistry.2021; 51(4): 341. CrossRef

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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; Restor Dent Endod 2018;43(1):e3. Published online December 24, 2017; DOI: https://doi.org/10.5395/rde.2018.43.e3

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Objectives

The aim of this study was to compare root canal volume change and canal transportation by Vortex Blue (VB; Dentsply Tulsa Dental Specialties), ProTaper Next (PTN; Dentsply Maillefer), and ProTaper Universal (PTU; Dentsply Maillefer) nickel-titanium rotary files in curved root canals.

Materials and Methods

Thirty canals with 20°–45° of curvature from extracted human molars were used. Root canal instrumentation was performed with VB, PTN, and PTU files up to #30.06, X3, and F3, respectively. Changes in root canal volume before and after the instrumentation, and the amount and direction of canal transportation at 1, 3, and 5 mm from the root apex were measured by using micro-computed tomography. Data of canal volume change were statistically analyzed using one-way analysis of variance and Tukey test, while data of amount and direction of transportation were analyzed using Kruskal-Wallis and Mann-Whitney U test.

Results

There were no significant differences among 3 groups in terms of canal volume change (p > 0.05). For the amount of transportation, PTN showed significantly less transportation than PTU at 3 mm level (p = 0.005). VB files showed no significant difference in canal transportation at all 3 levels with either PTN or PTU files. Also, VB files showed unique inward transportation tendency in the apical area.

Conclusions

Other than PTN produced less amount of transportation than PTU at 3 mm level, all 3 file systems showed similar level of canal volume change and transportation, and VB file system could prepare the curved canals without significant shaping errors.

Citations

Citations to this article as recorded by

Micro-Computed Tomographic Evaluation of the Shaping Ability of Vortex Blue and TruNatomyTM Ni-Ti Rotary Systems
Batool Alghamdi, Mey Al-Habib, Mona Alsulaiman, Lina Bahanan, Ali Alrahlah, Leonel S. J. Bautista, Sarah Bukhari, Mohammed Howait, Loai Alsofi
Crystals.2024; 14(11): 980. CrossRef
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 nickel titanium rotary instruments on canal transportation and centering ability in curved canals by using cone beam computed tomography: An in vitro study
Krishnaveni Krishnaveni, Nikitha Kalla, Nagalakshmi Reddy, Sharvanan Udayar
Journal of Dental Specialities.2023; 11(2): 105. CrossRef
Comparative Evaluation of Root Canal Centering Ability of Two Heat-treated Single-shaping NiTi Rotary Instruments in Simulated Curved Canals: An In Vitro Study
Preethi Varadan, Chakravarthy Arumugam, Athira Shaji, R R Mathan
World Journal of Dentistry.2023; 14(6): 535. CrossRef
A Comparison of Canal Width Changes in Simulated Curved Canals prepared with Profile and Protaper Rotary Systems
Aisha Faisal, Huma Farid, Robia Ghafoor
Pakistan Journal of Health Sciences.2022; : 55. CrossRef
Evaluation of the Respect of the Root Canal Trajectory by Rotary Niti Instruments (Protaper®Universal): Retrospective Radiographic Study
Salma El Abbassi, Sanaa Chala, Majid Sakout, Faïza Abdallaoui
Integrative Journal of Medical Sciences.2022;[Epub] CrossRef

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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; Restor Dent Endod 2016;41(1):1-5. Published online February 4, 2016; DOI: https://doi.org/10.5395/rde.2016.41.1.1

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Objectives

The purpose of this study was to assess the ability of ProTaper Gold (PTG, Dentsply Maillefer) in maintaining the original profile of root canal anatomy. For that, ProTaper Universal (PTU, Dentsply Maillefer) was used as reference techniques for comparison.

Materials and Methods

Twenty simulated curved canals manufactured in clear resin blocks were randomly assigned to 2 groups (n = 10) according to the system used for canal instrumentation: PTU and PTG groups, upto F2 files (25/0.08). Color stereomicroscopic images from each block were taken exactly at the same position before and after instrumentation. All image processing and data analysis were performed with an open source program (FIJI). Evaluation of canal transportation was obtained for two independent canal regions: straight and curved levels. Student's t test was used with a cut-off for significance set at α = 5%.

Results

Instrumentation systems significantly influenced canal transportation (p < 0.0001). A significant interaction between instrumentation system and root canal level (p < 0.0001) was found. PTU and PTG systems produced similar canal transportation at the straight part, while PTG system resulted in lower canal transportation than PTU system at the curved part. Canal transportation was higher at the curved canal portion (p < 0.0001).

Conclusions

PTG system produced overall less canal transportation in the curved portion when compared to PTU system.

Citations

Citations to this article as recorded by

Shaping, and disinfecting abilities of ProTaper Universal, ProTaper Gold, and Twisted Files: A correlative microcomputed tomographic and bacteriologic analysis
Malavika Sivakumar, Ruchika Roongta Nawal, Sangeeta Talwar, CP Baveja, Rega Kumar, Sudha Yadav, S Santosh Kumar
Endodontology.2023; 35(1): 54. CrossRef
Advancing Nitinol: From heat treatment to surface functionalization for nickel–titanium (NiTi) instruments in endodontics
Wai-Sze Chan, Karan Gulati, Ove A. Peters
Bioactive Materials.2023; 22: 91. CrossRef
Comparative Evaluation of Root Canal Centering Ability of Two Heat-treated Single-shaping NiTi Rotary Instruments in Simulated Curved Canals: An In Vitro Study
Preethi Varadan, Chakravarthy Arumugam, Athira Shaji, R R Mathan
World Journal of Dentistry.2023; 14(6): 535. CrossRef
An Appraisal on Newer Endodontic File Systems: A Narrative Review
Shalini Singh, Kailash Attur, Anjali Oak, Mohammed Mustafa, Kamal Kumar Bagda, Nishtha Kathiria
The Journal of Contemporary Dental Practice.2023; 23(9): 944. CrossRef
Shaping ability of modern Nickel–Titanium rotary systems on the preparation of printed mandibular molars
Seda Falakaloglu, Emmanuel Silva, Burcu Topal, Emre İriboz, Mustafa Gündoğar
Journal of Conservative Dentistry.2022; 25(5): 498. 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
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
Impact of Endodontic Kinematics on Stress Distribution During Root Canal Treatment: Analysis of Photoelastic Stress
Shelyn Akari Yamakami, Julia Adornes Gallas, Igor Bassi Ferreira Petean, Aline Evangelista Souza-Gabriel, Manoel Sousa-Neto, Ana Paula Macedo, Regina Guenka Palma-Dibb
Journal of Endodontics.2022; 48(2): 255. 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
A Comparative Study of Two Martensitic Alloy Systems in Endodontic Files Carried out by Unskilled Hands
Juan Algar, Alejandra Loring-Castillo, Ruth Pérez-Alfayate, Carmen Martín Carreras-Presas, Ana Suárez
Applied Sciences.2022; 12(12): 6289. CrossRef
Quantitative evaluation of apically extruded debris using TRUShape, TruNatomy, and WaveOne Gold in curved canals
Nehal Nabil Roshdy, Reham Hassan
BDJ Open.2022;[Epub] CrossRef
Comparison of Canal Transportation, Separation Rate, and Preparation Time between One Shape and Neoniti (Neolix): An In Vitro CBCT Study
Maryam Kuzekanani, Faranak Sadeghi, Nima Hatami, Maryam Rad, Mansoureh Darijani, Laurence James Walsh, Sivakumar Nuvvula
International Journal of Dentistry.2021; 2021: 1. CrossRef
Shaping ability of ProTaper Gold, One Curve, and Self-Adjusting File systems in severely curved canals: A cone-beam computed tomography study
MeenuG Singla, Hemanshi Kumar, Ritika Satija
Journal of Conservative Dentistry.2021; 24(3): 271. CrossRef
Cone-beam computed tomographic analysis of apical transportation and centering ratio of ProTaper and XP-endo Shaper NiTi rotary systems in curved canals: an in vitro study
Hamed Karkehabadi, Zeinab Siahvashi, Abbas Shokri, Nasrin Haji Hasani
BMC Oral Health.2021;[Epub] CrossRef
Mechanical Tests, Metallurgical Characterization, and Shaping Ability of Nickel-Titanium Rotary Instruments: A Multimethod Research
Emmanuel J.N.L. Silva, Jorge N.R. Martins, Carolina O. Lima, Victor T.L. Vieira, Francisco M. Braz Fernandes, Gustavo De-Deus, Marco A. Versiani
Journal of Endodontics.2020; 46(10): 1485. CrossRef
Micro-computed tomographic evaluation of a new system for root canal filling using calcium silicate-based root canal sealers
Mario Tanomaru-Filho, Fernanda Ferrari Esteves Torres, Jader Camilo Pinto, Airton Oliveira Santos-Junior, Karina Ines Medina Carita Tavares, Juliane Maria Guerreiro-Tanomaru
Restorative Dentistry & Endodontics.2020;[Epub] CrossRef
Comparison of vibration characteristics of file systems for root canal shaping according to file length
Seong-Jun Park, Se-Hee Park, Kyung-Mo Cho, Hyo-Jin Ji, Eun-Hye Lee, Jin-Woo Kim
Restorative Dentistry & Endodontics.2020;[Epub] CrossRef
New thermomechanically treated NiTi alloys – a review
J. Zupanc, N. Vahdat‐Pajouh, E. Schäfer
International Endodontic Journal.2018; 51(10): 1088. CrossRef
Shaping ability of four root canal instrumentation systems in simulated 3D-printed root canal models
David Christofzik, Andreas Bartols, Mahmoud Khaled Faheem, Doreen Schroeter, Birte Groessner-Schreiber, Christof E. Doerfer, Cyril Charles
PLOS ONE.2018; 13(8): e0201129. CrossRef
OPEN-SOURCE SOFTWARE IN DENTISTRY: A SYSTEMATIC REVIEW
Małgorzata Chruściel-Nogalska, Tomasz Smektała, Marcin Tutak, Katarzyna Sporniak-Tutak, Raphael Olszewski
International Journal of Technology Assessment in Health Care.2017; 33(4): 487. 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
A comparison of the shaping ability of three nickel-titanium rotary instruments: a micro-computed tomography study via a contrast radiopaque technique in vitro
Zhao Wei, Zhi Cui, Ping Yan, Han Jiang
BMC Oral Health.2017;[Epub] CrossRef
Root Canal Transportation and Centering Ability of Nickel-Titanium Rotary Instruments in Mandibular Premolars Assessed Using Cone-Beam Computed Tomography
Iussif Mamede-Neto, Alvaro Henrique Borges, Orlando Aguirre Guedes, Durvalino de Oliveira, Fábio Luis Miranda Pedro, Carlos Estrela
The Open Dentistry Journal.2017; 11(1): 71. CrossRef
Blue Thermomechanical Treatment Optimizes Fatigue Resistance and Flexibility of the Reciproc Files
Gustavo De-Deus, Emmanuel João Nogueira Leal Silva, Victor Talarico Leal Vieira, Felipe Gonçalves Belladonna, Carlos Nelson Elias, Gianluca Plotino, Nicola Maria Grande
Journal of Endodontics.2017; 43(3): 462. CrossRef

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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

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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

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Basic Researchs

Evaluation of apical canal shapes produced sequentially during instrumentation with stainless steel hand and Ni-Ti rotary instruments using Micro-computed tomography: Woo-Jin Lee, Jeong-Ho Lee, Kyung-A Chun, Min-Seock Seo, Yeon-Jee Yoo, Seung-Ho Baek; J Korean Acad Conserv Dent 2011;36(3):231-237. Published online May 31, 2011; DOI: https://doi.org/10.5395/JKACD.2011.36.3.231

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Objectives

The purpose of this study was to determine the optimal master apical file size with minimal transportation and optimal efficiency in removing infected dentin. We evaluated the transportation of the canal center and the change in untouched areas after sequential preparation with a #25 to #40 file using 3 different instruments: stainless steel K-type (SS K-file) hand file, ProFile and LightSpeed using microcomputed tomography (MCT).

Materials and Methods

Thirty extracted human mandibular molars with separated orifices and apical foramens on mesial canals were used. Teeth were randomly divided into three groups: SS K-file, Profile, LightSpeed and the root canals were instrumented using corresponding instruments from #20 to #40. All teeth were scanned with MCT before and after instrumentation. Cross section images were used to evaluate canal transportation and untouched area at 1- , 2- , 3- , and 5- mm level from the apex. Data were statistically analyzed according to' repeated nested design'and Mann-Whitney test (p = 0.05).

Results

In SS K-file group, canal transportation was significantly increased over #30 instrument. In the ProFile group, canal transportation was significantly increased after preparation with the #40 instrument at the 1- and 2- mm levels. LightSpeed group showed better centering ability than ProFile group after preparation with the #40 instrument at the 1 and 2 mm levels.

Conclusions

SS K-file, Profile, and LightSpeed showed differences in the degree of apical transportation depending on the size of the master apical file.

Citations

Citations to this article as recorded by

Comparison of the shaping abilities of three nickel–titanium instrumentation systems using micro-computed tomography
Jin Yi Baek, Hyun Mi Yoo, Dong Sung Park, Tae Seok Oh, Kee Yeon Kum, Seung Yun Shin, Seok Woo Chang
Journal of Dental Sciences.2014; 9(2): 111. CrossRef

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Comparison of apical transportation and change of working length in K3, NRT AND PROFILE rotary instruments using transparent resin block: Min-Jung Yoon, Min-Ju Song, Su-Jung Shin, Euiseong Kim; J Korean Acad Conserv Dent 2011;36(1):59-65. Published online January 31, 2011; DOI: https://doi.org/10.5395/JKACD.2011.36.1.59

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Objectives

The purpose of this study is to compare the apical transportation and working length change in curved root canals created in resin blocks, using 3 geometrically different types of Ni-Ti files, K3, NRT, and Profile.

Materials and Methods

The curvature of 30 resin blocks was measured by Schneider technique and each groups of Ni-Ti files were allocated with 10 resin blocks at random. The canals were shaped with Ni-Ti files by Crown-down technique. It was analyzed by Double radiograph superimposition method (Backman CA 1992), and for the accuracy and consistency, specially designed jig, digital X-ray, and CAD/CAM software for measurement of apical transportation were used. The amount of apical transportation was measured at 0, 1, 3, 5 mm from 'apical foramen - 0.5 mm' area, and the alteration of the working length before and after canal shaping was also measured. For statistics, Kruskal-Wallis One Way Analysis was used.

Results

There was no significant difference between the groups in the amount of working length change and apical transportation at 0, 1, and 3 mm area (p = 0.027), however, the amount of apical transportation at 5 mm area showed significant difference between K3 and Profile system (p = 0.924).

Conclusions

As a result of this study, the 3 geometrically different Ni-Ti files showed no significant difference in apical transportation and working length change and maintained the original root canal shape.

Citations

Citations to this article as recorded by

A comparison of dimensional standard of several nickel-titanium rotary files
Ki-Won Kim, Kyung-Mo Cho, Se-Hee Park, Ki-Yeol Choi, Bekir Karabucak, Jin-Woo Kim
Restorative Dentistry & Endodontics.2014; 39(1): 7. CrossRef

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Original Articles

Step by step analysis of root canal instrumentation with ProTaper®: Mi-Hee Kim, Bock Huh, Hyeon-Cheol Kim, Jeong-Kil Park; J Korean Acad Conserv Dent 2006;31(1):50-57. Published online January 31, 2006; DOI: https://doi.org/10.5395/JKACD.2006.31.1.050

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The purpose of this study was to investigate influence of each file step of ProTaper® system on canal transportation.

Twenty simulated canals were prepared with either engine-driven ProTaper® or manual ProTaper®. Group R-resin blocks were instrumented with rotary ProTaper® and group M-resin blocks were instrumented with manual ProTaper®. Pre-operative resin blocks and post-operative resin blocks after each file step preparation were scanned. Original canal image and the image after using each file step were superimposed for calculation of centering ratio. The image after using each file step and image after using previous file step were superimposed for calculation of the amount of deviation. Measurements were taken horizontally at five different levels (1, 2, 3, 4 and 5 mm) from the level of apical foramen.

In rotary ProTaper® instrumentation group, centering ratio and the amount of deviation of each step at all levels were not significantly different (p > 0.05). In manual ProTaper® instrumentation group, centering ratio and the amount of deviation of each step at all levels except of 1 mm were not significantly different (p > 0.05). At the level of 1 mm, F2 file step had significantly large centering ratio and the amount of deviation (p < 0.05).

Under the condition of this study, F2 file step of manual ProTaper® tended to transport the apical part of the canals than that of rotary ProTaper®.

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Effect of various canal preparation techniques using rotary nickel-titanium files on the maintenance of canal curvature: Cheol-Hwan Lee, Kyung-Mo Cho, Chan-Ui Hong; J Korean Acad Conserv Dent 2003;28(1):41-49. Published online January 31, 2003; DOI: https://doi.org/10.5395/JKACD.2003.28.1.041

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There are increasing usage of Nickel-Titanium rotary files in modern clinical endodontic treatment because it is effective and faster than hand filing due to reduced step.

This study was conducted to evaluate the effect of canal preparations using 3 different rotary Nickel-Titanium files that has different cross sectional shape and taper on the maintenance of canal curvature. Simulated resin block were instrumented with Profile(Dentsply, USA), GT rotary files(Dentsply, USA), Hero 642(Micro-Mega, France), and Pro-Taper(Dentsply, USA).

The image of Pre-instrumentation and Post-instrumentation were acquired using digital camera and overspreaded in the computer. Then the total differences of canal diameter, deviation at the outer portion of curvature, deviation at the inner portion of curvature, movement of center of the canal and the centering ratio at the pre-determined level from the apex were measured.

Results were statistically analyzed by means of ANOVA, followed by Scheffe test at a significance level of 0.05.

The results were as follows;

1. Deviation at the outer portion of curvature, deviation at the inner portion of curvature were showed largest in Pro-Taper, so also did in the total differences of canal diameter(p<0.05).

2. All the groups showed movements of center. Profile combined with GT rotary files and Hero 642 has no difference but Pro-Taper showed the most deviation(p<0.05).

3. At the 1, 2, 3mm level from the apex movements of center directed toward the outer portion of curvature, but in 4, 5 mm level directed toward the inner portion of curvature(p<0.05).

As a results of this study, it could be concluded that combined use of other Nickel-Titanium rotary files is strongly recommended when use Pro-Taper file because it could be remove too much canal structure and also made more deviation of canal curvature than others.

Citations

Citations to this article as recorded by

Stress distribution of three NiTi rotary files under bending and torsional conditions using a mathematic analysis
T. O. Kim, G. S. P. Cheung, J. M. Lee, B. M. Kim, B. Hur, H. C. Kim
International Endodontic Journal.2009; 42(1): 14. CrossRef
Comparison of shaping ability using various Nickel-Titanium rotary files and hybrid technique
Jung-Won Kim, Jeong-Kil Park, Bock Hur, Hyeon-Cheol Kim
Journal of Korean Academy of Conservative Dentistry.2007; 32(6): 530. CrossRef
A study of insertion depth of buchanan plugger after shaping using NI-TI rotary files in simulated resin root canals
Youn-Sik Park, Dong-Jun Kim, Yun-Chan Hwang, In-Nam Hwang, Won-Mann Oh
Journal of Korean Academy of Conservative Dentistry.2006; 31(2): 125. CrossRef
Step by step analysis of root canal instrumentation with ProTaper®
Mi-Hee Kim, Bock Huh, Hyeon-Cheol Kim, Jeong-Kil Park
Journal of Korean Academy of Conservative Dentistry.2006; 31(1): 50. CrossRef
Effect of anticurvature filing method on preparation of the curved root canal using ProFile
Hyun-Ji Song, Juhea Chang, Kyung-Mo Cho, Jin-Woo Kim
Journal of Korean Academy of Conservative Dentistry.2005; 30(4): 327. CrossRef
A comparison of shaping ability of the three ProTaper® instrumentation techniques in simulated canals
So-Youn Kim, Jeong-Kil Park, Bock Hur, Hyeon-Cheol Kim
Journal of Korean Academy of Conservative Dentistry.2005; 30(1): 58. CrossRef

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