Restorative Dentistry & Endodontics

Sample size determination for conducting a pilot study to assess reliability of a questionnaire: Mohamad Adam Bujang, Evi Diana Omar, Diana Hui Ping Foo, Yoon Khee Hon; Restor Dent Endod 2024;49(1):e3. Published online January 10, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e3

This article is a narrative review that discusses the recommended sample size requirements to design a pilot study to assess the reliability of a questionnaire. A list of various sample size tables that are based on the kappa agreement test, intra-class correlation test and Cronbach’s alpha test has been compiled together. For all calculations, type I error (alpha) was set at a maximum value of 0.05, and power was set at a minimum value of 80.0%. For the kappa agreement test, intra-class correlation test, and Cronbach’s alpha test, the recommended minimum sample size requirement based on the ideal effect sizes shall be at least 15, 22, and 24 subjects respectively. By making allowances for a non-response rate of 20.0%, a minimum sample size of 30 respondents will be sufficient to assess the reliability of the questionnaire. The clear guideline of minimum sample size requirement for the pilot study to assess the reliability of a questionnaire is discussed and this will ease researchers in preparation for the pilot study. This study provides justification for a minimum requirement of a sample size of 30 respondents specifically to test the reliability of a questionnaire.

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Guided endodontics, precision and predictability: a case series of mineralized anterior teeth with follow-up cone-beam computed tomography: Rafael Fernández-Grisales, Wilder Javier Rojas-Gutierrez, Pamela Mejía, Carolina Berruecos-Orozco, Néstor Ríos-Osorio; Restor Dent Endod 2025;50(1):e4. Published online January 6, 2025; DOI: https://doi.org/10.5395/rde.2025.50.e4

Abstract PDF PubReader ePub: Pulp chamber and root canal obliteration (PCO/RCO) presents a challenge for clinicians when nonsurgical endodontic treatment is indicated. Guided endodontics (GE) aims to precisely locate the root canal (RC) system while preserving as much pericervical dentin as possible. GE involves integrating cone-beam computed tomography (CBCT) of the affected tooth with a digital impression of the maxillary/mandibular arch, allowing for careful planning of the drilling path to the RC system through a three-dimensional (3D) static guide. This article reports four cases of teeth with PCO/RCO, accompanied by additional diagnoses of internal and external root resorption and horizontal tooth fracture, all successfully treated with GE. These cases highlight the clinical and radiographic success of GE treatments using CBCT, establishing this technique as a predictable approach for managing mineralized teeth.

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Concentrated growth factor scaffold-based pulpotomy of permanent molars with symptomatic irreversible pulpitis: Arthi K. Harith, Vishnupriya Koteeswaran, Dinesh Kowsky, Natanasabapathy Velmurugan, Suresh Nandini; Restor Dent Endod 2025;50(1):e1. Published online January 17, 2025; DOI: https://doi.org/10.5395/rde.2025.50.e1

Abstract PDF PubReader ePub: Objectives
Pulpotomy is a minimally invasive procedure that aims to retain the vitality of the radicular pulp by removing the inflamed coronal pulp tissue. This case series presents the successful management of symptomatic irreversible pulpitis by pulpotomy with concentrated growth factor (CGF) scaffolds.
Methods
Six permanent mandibular molars with a diagnosis of symptomatic irreversible pulpitis were included. Under Local anesthesia and rubber dam isolation, caries were excavated using high-speed bur under coolant. Full coronal pulpotomy was done and hemostasis was achieved. CGF membrane was prepared and placed over the radicular pulp and layered with Biodentine (Septodont). Final restoration of type IX glass ionomer cement and bulk fill composite resin was placed. Patients were assessed for various clinical and radiographic parameters at intervals of 1 week and 3, 6, and 12 months. Five patients fulfilled the success criteria at the end of 1 year.
Results
Pulpotomy is considered an alternative treatment modality for root canal treatment in symptomatic irreversible pulpitis aiming at alleviating symptoms and maintaining vitality. CGF scaffold when used as a capping material acts as a reservoir for growth factors with anti-inflammatory properties and enhances healing.
Conclusions
Scaffold-based pulpotomy can be considered a biological approach to healing inflamed pulp.

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Effects of different curing methods on the color stability of composite resins: Massimo Pisano, Alfredo Iandolo, Dina Abdellatif, Andrea Chiacchio, Marzio Galdi, Stefano Martina; Restor Dent Endod 2024;49(4):e33. Published online September 5, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e33

Abstract PDF PubReader ePub

Objectives

The aim of this study was to compare the effects of different polymerization strategies and the effectiveness of finishing and polishing procedures of composite resins on color stability.

Materials and Methods

The samples were divided into 4 main groups according to the polymerization strategy, and all groups except the control group received surface treatment. Each group was subsequently divided into 3 subgroups respectively: Kuraray Clearfil Majesty ES-2 Classic, Premium and Universal. Approximately 24 hours after preparation of the samples, they were immersed for 7 days in a coffee solution. A first color measurement was performed after the preparation of the samples, the second measurement was performed after 7 days in the coffee solution. All measurements were carried out using a dental spectrophotometer to assess the CIE L* a* b* color parameters.

Results

There was a statistically significant difference between ΔE values for different procedures (p = 0.003); in particular, the differences were found only between the groups that received surface treatment and the control group. In addition, a statistically significant difference was observed between the values of ΔE for different composites in the different procedure groups.

Conclusions

Spectrophotometric analysis showed that the additional photopolymerization and oxygen inhibition procedures did not yield better results in relation to color stability. In addition, finishing and polishing provided better color stability compared to not performing these procedures.

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Abrasiveness and Bleaching Level of Toothpastes on Composite Resins: A Quantitative Analysis Using a Novel Brushing Simulator
Simge Meseli, Elif Alkan, Bora Korkut, Ozlem Kanar, Dilek Tagtekin
Applied Sciences.2025; 15(5): 2314. CrossRef

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Success rate of direct pulp capping on permanent teeth using bioactive materials: a systematic review and meta-analysis of randomized clinical trials: Karem Paula Pinto, Gabriela Ribeiro da Silva, Cláudio Malizia Alves Ferreira, Luciana Moura Sassone, Emmanuel João Nogueira Leal da Silva; Restor Dent Endod 2024;49(4):e34. Published online September 6, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e34

Abstract PDF Supplementary Material PubReader ePub: This systematic review and meta-analysis aimed to evaluate the success rate of direct pulp capping (DPC) on permanent teeth, comparing the use of MTA with calcium hydroxide and calcium silicate-based cements. A systematic search was carried out in 4 databases until July 2023. The selection was based on PICOS criteria and only randomized clinical trials were included. The risk of bias was assessed using RoB-2 tool, and meta-analyses were performed using RevMan 5.3 software. The overall quality of evidence was determined using the GRADE tool. Thirteen studies were included. Meta-analyses indicated significantly higher success rate for DPC using MTA compared to calcium hydroxide, while no significant difference was observed between MTA and Biodentine, showing a success rate from 80% to 100% even after 3 years of follow-up. Five studies were classified as having high risk of bias and the GRADE assessment revealed low certainty of evidence. DPC is highly effective for permanent teeth when using MTA or Biodentine. There is a need for future well-designed randomized clinical trials to evaluate the efficacy of DPC using newer bioceramic materials.

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Fracture resistance and failure modes of endodontically-treated permanent teeth restored with Ribbond posts vs other post systems: a systematic review and meta-analysis of in vitro studies: Meghana Aditya Vartak, Vibha Rahul Hegde, Sanitra Rahul Hegde, Ushaina Fanibunda; Restor Dent Endod 2025;50(1):e5. Published online February 17, 2025; DOI: https://doi.org/10.5395/rde.2025.50.e5

Abstract PDF PubReader ePub: Objectives
This systematic review aimed to investigate the fracture resistance and mode of failure of endodontically-treated permanent teeth restored with Ribbond posts (Ribbond, Inc.) compared with endodontically-treated permanent teeth restored with other post systems.
Methods
A comprehensive, systematic literature search was carried out using several electronic databases: MEDLINE/PubMed, Google Scholar, and Cochrane Library. Two separate researchers were appointed to identify the studies meeting the eligibility criteria, and to perform the data extraction, risk of bias, and quality assessment.
Results
Twelve studies were included in the quantitative analysis. Meta-analysis was performed with 11 of the 12 included articles. The meta-analysis showed that Ribbond posts have a fracture strength less than prefabricated metal posts, cast metal posts, and prefabricated fiber posts and greater than custom e-glass fiber posts. Mode of failure analysis revealed that Ribbond posts have the most favorable non-catastrophic fractures.
Conclusions
Although Ribbond posts have lower fracture resistance, their favorable mode of failure makes them potentially the most biomimetic post system.

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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.

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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

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An unusual case of dens invaginatus on a mandibular second molar: a case report: Davide Mancino, Dina Abdellatif, Alfredo Iandolo, Fabien Bornert, Youssef Haïkel; Restor Dent Endod 2025;50(1):e2. Published online January 8, 2025; DOI: https://doi.org/10.5395/rde.2025.50.e2

Abstract PDF PubReader ePub: The present case report describes the endodontic treatment of a type III B dens invaginatus (DI) in a three-rooted mandibular second molar since the invagination invades the root and extends apically. Clinical and cone-beam computed tomography examination of the mandibular second molar showed a broadened coronal morphology, DI, a third root, periapical radiolucency, and compression of a distal root canal by the invagination, which developed an atypical semilunar shape. The tooth was diagnosed with pulpal necrosis, symptomatic apical, and peri-invagination periodontitis. Consequently, three-dimensional virtual reconstruction was conducted to improve anatomical interpretation and case planning and accelerate the intraoperative phase by reducing operator stress and minimizing intraoperative variables. The present case report aims to raise awareness of the existence of DI on the mandibular second molar.

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Effect of quality of radiographs taken during root canal treatment on technical quality of root canal fillings and endodontic outcome: Jia Min Ng, Yan Yee Lee, Prashanti Chippagiri, Elaheh Ahanin, Abhishek Parolia; Restor Dent Endod 2025;50(1):e3. Published online January 7, 2025; DOI: https://doi.org/10.5395/rde.2025.50.e3

Abstract PDF PubReader ePub: Objectives
This study evaluated the number and quality of working length (WL) and master cone (MC) radiographs taken during root canal treatment by dental undergraduates, and their associations with the technical quality of root canal fillings (TQRCF) and endodontic outcomes (EO).
Methods
A retrospective evaluation of radiographs from 303 root canal-treated teeth in 231 patients was conducted, with 72 patients attending recall visits to assess EO. The chi-square and one-way analysis of variance tests were performed.
Results
A total of 505 WL and 557 MC radiographs were reviewed, with 72.9% and 75% deemed satisfactory, respectively. Satisfactory TQRCF was achieved in 60.4% of cases. Significant associations were found between the extension of the file in WL and gutta-percha in MC radiographs and TQRCF (p = 0.000). Misinterpretation of these radiographs resulted in poor TQRCF. Furthermore, 64.2% of teeth had satisfactory EO. A significant relationship was noted between the quality of MC radiographs and both TQRCF (p = 0.043) and EO (p = 0.003).
Conclusions
Unsatisfactory MC radiographs were linked to poor TQRCF and unfavorable EO. Regular radiographic training is recommended to enhance EO.

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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.

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Influence of disinfecting solutions on the surface topography of gutta-percha cones: a systematic review of in vitro studies: Lora Mishra, Gathani Dash, Naomi Ranjan Singh, Manoj Kumar, Saurav Panda, Franck Diemer, Monika Lukomska-Szymanska, Barbara Lapinska, Abdul Samad Khan; Restor Dent Endod 2024;49(4):e42. Published online November 1, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e42

Abstract PDF Supplementary Material PubReader ePub: The surface integrity of gutta-percha cones is a crucial factor in the success of endodontic procedures. Disinfecting solutions play a pivotal role in sterilizing gutta-percha cones, but their influence on gutta-percha surface topography remains a subject of concern. This systematic review aimed to present a qualitative synthesis of available laboratory studies assessing the influence of disinfecting solutions on the surface topography of gutta-percha and offers insights into the implications for clinical practice. The present review followed PRISMA 2020 guidelines. An advanced database search was performed in PubMed, Google Scholar, Embase, Scopus, LILAC, non-indexed citations and reference lists of eligible studies in May 2024. Laboratory studies, in English language, were considered for inclusion. The quality (risk of bias) of the included studies was assessed using parameters for in vitro studies. A total of 28 studies were included in the qualitative synthesis. Based on the included in vitro studies, surface deposits and alterations in the physical properties of gutta-percha cones were observed after the disinfection protocol. A comprehensive review of the available literature indicates that the choice of disinfecting solution, its concentration, and immersion time significantly affect the surface topography of gutta-percha cones.

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Physical-mechanical, chemical and biological properties of graphene-reinforced glass ionomer cements: Tatiane Ramos dos Santos Jordão, Laura Soares Viana Fernandes, Karla Lorene de França Leite, Adílis Alexandria, Emmanuel João Nogueira Leal Silva, Lucianne Cople Maia, Tatiana Kelly da Silva Fidalgo; Restor Dent Endod 2024;49(4):e37. Published online October 10, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e37

Abstract PDF PubReader ePub: Objectives
This study aimed to evaluate the physical-mechanical, chemical, and biological properties of graphene-reinforced glass ionomer cements (GICs).
Materials and Methods
Different proportions of graphene powder were incorporated into 2 high-viscosity self-curing GIC, Ketac Molar (G_Ketac) and Fuji IX (G_Fuji), in 4 different concentrations: 0.5%, 1%, 2%, and 5%. The control groups included the GICs without graphene. Experiments were performed to analyze linear (Ra) and volumetric roughness (Sa), antimicrobial activity, radiopacity, fluoride release, microhardness, solubility, and water sorption. Data were analyzed using Kruskal-Wallis, Mann-Whitney, Wilcoxon, analysis of variance, and Tukey’s test (p ≤ 0.05).
Results
The G_Ketac 0% and G_Fuji0% groups presented higher Ra (4.05 and 2.72) and Sa (4.76 and 5.16), respectively. No inhibition zone was observed, and the incorporation of graphene reduced radiopacity. Moreover, there was no influence on the solubility and water sorption after 21 days. A greater fluoride release was observed in the period of 7 days for most of the groups. After 21 days, G_Ketac 5%, 2%, and 1% presented higher releasing than 0% and 0.5% (p ≤ 0.05).
Conclusions
The graphene incorporation improved the microhardness of GICs in lower concentrations. Graphene incorporation to GICs modified some physical-mechanical, and chemical, but not affected biological properties.

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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.

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Straightforward replication of digital wax-up design into direct composite resin restorations in adolescents using a custom 3-dimensionally printed index: Ra’fat Ibrahim Farah, Sanaa Najeh Al-Haj Ali, Abdullah Alharbi, Bandar Alresheedi; Restor Dent Endod 2024;49(4):e36. Published online October 10, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e36

Abstract PDF PubReader ePub: This case report introduces a straightforward, noninvasive approach for the esthetic rehabilitation of malformed anterior teeth in adolescents using direct composite restorations. The universal composite resin restorations are applied within a transparent 3-dimensionally printed rigid-resin index, which is individually customized from a digital wax-up. Compared to other methods, this technique streamlines the restoration process, significantly reducing chairside time while enhancing the predictability, accuracy, and patient acceptance of the aesthetic outcome.

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Evaluation of mineral induction ability and cytotoxicity of carbonated hydroxyapatite for pulp tissue regeneration: an in vitro study: S. Swathi Priyadharshini, Chinnasamy Ragavendran, Anand Sherwood, J. Ramana Ramya, Jogikalmat Krithikadatta; Restor Dent Endod 2024;49(4):e40. Published online October 29, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e40

Abstract PDF PubReader ePub

Objectives

This study aimed to evaluate carbonated hydroxyapatite (CHA)’s ability for mineral induction and its in vitro cytotoxicity with human dental pulp cells.

Materials and Methods

Precursors for the study include di-ammonium hydrogen phosphate and calcium nitrate tetrahydrate, with sodium hydrogen carbonate added to achieve different levels of carbonate substitution. The synthesized CHA samples are characterized using X-ray diffraction, Fourier transform infrared spectroscopy, and Raman spectroscopy. Scanning electron microscopy (SEM) was used to observe morphology. For 14 days at 37°C, samples were submerged in simulated body fluid to assess their mineral induction capabilities. SEM was used to confirm apatite formation on sample surfaces. The cytotoxicity assay was used to assess the vitality of the cells following their exposure to various concentrations of CHA.

Results

The Joint Committee on Powder Diffraction Standards data for HA aligned well with the results from X-ray diffraction analysis of CHA across 3 different concentrations, indicating strong agreement. Fourier transform infrared spectra indicated the presence of phosphate, hydroxyl, and carbonate groups within the samples. SEM and Energy-dispersive X-ray analysis show agglomerated and flaky nanoparticles. All the samples are bioactive, but the formation of apatite differs from one another. In vitro cytotoxicity assay showed that over 70% of cells maintain viability.

Conclusions

The results of this study may provide insight into the potential use of carbonated HA as a dental pulp-capping material for vital pulp therapy.

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Comparative evaluation of compressive strength and morphological interface of carbonated hydroxyapatite with other pulp capping materials: An in vitro analysis
S. Swathi Priyadharshini, Chinnasamy Ragavendran, I. Anand Sherwood, Ramanaramya Jeyapalan
Endodontology.2025; 37(1): 90. CrossRef

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Cone-beam computed tomography in endodontics: from the specific technical considerations of acquisition parameters and interpretation to advanced clinical applications: Néstor Ríos-Osorio, Sara Quijano-Guauque, Sandra Briñez-Rodríguez, Gustavo Velasco-Flechas, Antonieta Muñoz-Solís, Carlos Chávez, Rafael Fernandez-Grisales; Restor Dent Endod 2024;49(1):e1. Published online December 11, 2023; DOI: https://doi.org/10.5395/rde.2024.49.e1

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The implementation of imaging methods that enable sensitive and specific observation of anatomical structures has been a constant in the evolution of endodontic therapy. Cone-beam computed tomography (CBCT) enables 3-dimensional (3D) spatial anatomical navigation in the 3 volumetric planes (sagittal, coronal and axial) which translates into great accuracy for the identification of endodontic pathologies/conditions. CBCT interpretation consists of 2 main components: (i) the generation of specific tasks of the image and (ii) the subsequent interpretation report. A systematic and reproducible method to review CBCT scans can improve the accuracy of the interpretation process, translating into greater precision in terms of diagnosis and planning of endodontic clinical procedures. MEDLINE (PubMed), Web of Science, Google Scholar, Embase and Scopus were searched from inception to March 2023. This narrative review addresses the theoretical concepts, elements of interpretation and applications of the CBCT scan in endodontics. In addition, the contents and rationale for reporting 3D endodontic imaging are discussed.

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Evaluation of Maxillary Sinus Pathologies in Children and Adolescents with Cleft Lip and Palate Using Cone Beam Computed Tomography: A Retrospective Study
Ayşe Çelik, Nilüfer Ersan, Senem Selvi-Kuvvetli
The Cleft Palate Craniofacial Journal.2025;[Epub] CrossRef
Machine Learning Models in the Detection of MB2 Canal Orifice in CBCT Images
Shishir Shetty, Meliz Yuvali, Ilker Ozsahin, Saad Al-Bayatti, Sangeetha Narasimhan, Mohammed Alsaegh, Hiba Al-Daghestani, Raghavendra Shetty, Renita Castelino, Leena R David, Dilber Uzun Ozsahin
International Dental Journal.2025; 75(3): 1640. CrossRef
Bildgebung im ZMK-Bereich – aber in welcher Reihenfolge?
Rainer Lutz
Zahnmedizin up2date.2024; 18(04): 297. CrossRef
Cone-beam computed tomography evaluation of shaping ability of kedo-S square and fanta AF™ baby rotary files compared to manual K-files in root canal preparation of primary anterior teeth
Shaimaa S. El-Desouky, Bassem N. El Fahl, Ibrahim A. Kabbash, Shimaa M. Hadwa
Clinical Oral Investigations.2024;[Epub] CrossRef
Analysis of Endodontic Successes and Failures in the Removal of Fractured Endodontic Instruments during Retreatment: A Systematic Review, Meta-Analysis, and Trial Sequential Analysis
Mario Dioguardi, Corrado Dello Russo, Filippo Scarano, Fariba Esperouz, Andrea Ballini, Diego Sovereto, Mario Alovisi, Angelo Martella, Lorenzo Lo Muzio
Healthcare.2024; 12(14): 1390. CrossRef

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Comparative evaluation of the biological response of conventional and resin modified glass ionomer cement on human cells: a systematic review: Shishir Singh, Gaurav Kulkarni, R S Mohan Kumar, Romi Jain, Ameya M Lokhande, Teena K Sitlaney, Musharraf H F Ansari, Navin S Agarwal; Restor Dent Endod 2024;49(4):e41. Published online November 1, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e41

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This review aimed to evaluate and compare the biological response (biocompatibility and cytotoxicity) of resin modified glass ionomer cement (RMGIC) in contrast to conventional glass ionomer cement (GIC) on human cells. Articles reporting parallel and split-mouth clinical trials, randomized controlled trials, non-randomized controlled trials, prospective studies, and in vitro studies on human permanent teeth that assessed the biological response of GIC and RMGIC were included. The following electronic bibliographic databases were searched using the keywords: MEDLINE/PubMed, EBSCO, Cochrane Central Register of Controlled Trials, and Google Scholar. For the risk of bias MINORS tool and the modified scale of Animal Research: Reporting of In Vivo Experiments and Consolidated Standards of Reporting Trials were used. Initial screening identified 552 studies, of which 9 articles met the inclusion criteria and were included in the study. Different parameters such as odontoblastic changes, inflammatory response, tertiary dentin formation, presence of microorganisms, morphological changes, cell viability, number, and metabolism were used to evaluate the biological response of conventional GIC and RMGICs. Conventional GIC shows lower cytotoxicity compared to RMGIC in vital pulp therapy procedures. Further, in vivo studies and long-term clinical trials are needed to compare these observations for pulp therapy using the 2 test materials.

Trial Registration

PROSPERO Identifier: CRD42023426021

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The conventional glass ionomers – A forgotten paradigm
Shishir Singh
Journal of Conservative Dentistry and Endodontics.2024; 27(12): 1201. CrossRef

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An elaboration on sample size determination for correlations based on effect sizes and confidence interval width: a guide for researchers: Mohamad Adam Bujang; Restor Dent Endod 2024;49(2):e21. Published online May 2, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e21

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Objectives

This paper aims to serve as a useful guide for sample size determination for various correlation analyses that are based on effect sizes and confidence interval width.

Materials and Methods

Sample size determinations are calculated for Pearson’s correlation, Spearman’s rank correlation, and Kendall’s Tau-b correlation. Examples of sample size statements and their justification are also included.

Results

Using the same effect sizes, there are differences between the sample size determination of the 3 statistical tests. Based on an empirical calculation, a minimum sample size of 149 is usually adequate for performing both parametric and non-parametric correlation analysis to determine at least a moderate to an excellent degree of correlation with acceptable confidence interval width.

Conclusions

Determining data assumption(s) is one of the challenges to offering a valid technique to estimate the required sample size for correlation analyses. Sample size tables are provided and these will help researchers to estimate a minimum sample size requirement based on correlation analyses.

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Return to work in young and middle-aged colorectal cancer survivors: Factors influencing self-efficacy, fear, resilience, and financial toxicity
Dan Hu, Yue Li, Hua Zhang, Lian-Lian Wang, Wen-Wen Liu, Xin Yang, Ming-Zhao Xiao, Hao-Ling Zhang, Juan Li
World Journal of Gastroenterology.2025;[Epub] CrossRef
Return to work in young and middle-aged colorectal cancer survivors: Factors influencing self-efficacy, fear, resilience, and financial toxicity
Dan Hu, Yue Li, Hua Zhang, Lian-Lian Wang, Wen-Wen Liu, Xin Yang, Ming-Zhao Xiao, Hao-Ling Zhang, Juan Li
World Journal of Gastroenterology.2025;[Epub] CrossRef
Predictive validity of obstacle-crossing test variations in identifying fallers after inpatient rehabilitation for stroke
Prudence Plummer, Megan E. Schliep, Lina Jallad, Ehsan Sinaei, Jody A. Feld, Vicki S. Mercer
Topics in Stroke Rehabilitation.2025; : 1. CrossRef
Global NDVI-LST Correlation: Temporal and Spatial Patterns from 2000 to 2024
Ehsan Rahimi, Pinliang Dong, Chuleui Jung
Environments.2025; 12(2): 67. CrossRef
The Role of the Basophil Activation Test in the Diagnosis of Drug-Induced Anaphylaxis
Maria Czarnobilska, Małgorzata Bulanda, Ewa Czarnobilska, Wojciech Dyga, Marcel Mazur
Diagnostics.2024; 14(18): 2036. CrossRef
Food insecurity impacts diet quality and adherence to the gluten‐free diet in youth with celiac disease
Xinyi Wang, Sven Anders, Zhiqian Jiang, Marcia Bruce, Dominica Gidrewicz, Margaret Marcon, Justine M. Turner, Diana R. Mager
Journal of Pediatric Gastroenterology and Nutrition.2024; 79(6): 1180. CrossRef
Fuel Load Models for Different Tree Vegetation Types in Sichuan Province Based on Machine Learning
Hongrong Wang, Haoquan Chen, Hanmin Sheng, Kai Chen, Chen Dong, Zhiqiang Min
Forests.2024; 16(1): 42. CrossRef

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Garre’s osteomyelitis of the mandible managed by nonsurgical re-endodontic treatment: Heegyun Kim, Jiyoung Kwon, Hyun-Jung Kim, Soram Oh, Duck-Su Kim, Ji-Hyun Jang; Restor Dent Endod 2024;49(2):e13. Published online March 18, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e13

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Chronic osteomyelitis with proliferative periostitis, known as Garre’s osteomyelitis, is a type of osteomyelitis characterized by a distinctive gross thickening of the periosteum of bones. Peripheral reactive bone formation can be caused by mild irritation or infection. Garre’s osteomyelitis is usually diagnosed in children and young adults, and the mandible is more affected than the maxilla. The following is a case report of a 12-year-old female patient with Garre’s osteomyelitis of the mandible due to an infection of a root canal-treated tooth. Without surgical intervention, the patient’s symptoms were relieved through nonsurgical root canal re-treatment with long-term calcium hydroxide placement. A cone-beam computed tomography image obtained 6 months after treatment completion displayed complete healing of the periapical lesion and resolution of the peripheral reactive buccal bone. Due to the clinical features of Garre's osteomyelitis, which is characterized by thickening of the periosteum, it can be mistaken for other diseases such as fibrous dysplasia. It is important to correctly diagnose Garre's osteomyelitis based on its distinctive clinical features to avoid unnecessary surgical intervention, and it can lead to minimally invasive treatment options.

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Focal osteomyelitis with proliferative periostitis
Zarah Yakoob
South African Dental Journal.2025; 79(09): 508. CrossRef

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Impact of different agitation methods on smear layer cleaning of mesial canals with accentuated curvature: Abel Teves Cordova, Murilo Priori Alcalde, Michel Espinosa Klymus, Leonardo Rigoldi Bonjardim, Rodrigo Ricci Vivan, Marco Antonio Hungaro Duarte; Restor Dent Endod 2024;49(2):e12. Published online March 4, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e12

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Objectives

This study evaluated the impact of different methods of irrigant agitation on smear layer removal in the apical third of curved mesial canals of 3 dimensionally (D) printed mandibular molars.

Materials and Methods

Sixty 3D-printed mandibular second molars were used, presenting a 70° curvature and a Vertucci type II configuration in the mesial root. A round cavity was cut 2 mm from the apex using a trephine of 2 mm in diameter, 60 bovine dentin disks were made, and a smear layer was formed. The dentin disks had the adaptation checked in the apical third of the teeth with wax. The dentin disks were evaluated in environmental scanning electron microscope before and after the following irrigant agitation methods: G1(PIK Ultrasonic Tip), G2 (Passive Ultrasonic Irrigation with Irrisonic– PUI), G3 (Easy Clean), G4 (HBW Ultrasonic Tip), G5 (Ultramint X Ultrasonic tip), and G6 (conventional irrigation-CI) (n = 10). All groups were irrigated with 2.5% sodium hypochlorite and 17% ethylenediaminetetraacetic acid.

Results

All dentin disks were 100% covered by the smear layer before treatment, and all groups significantly reduced the percentage of the smear layer after treatment. After the irrigation protocols, the Ultra-X group showed the lowest coverage percentage, statistically differing from the conventional, PIK, and HBW groups (p < 0.05). There was no significant difference among Ultramint X, PUI-Irrisonic, and Easy Clean (p > 0.05). None of the agitation methods could remove the smear layer altogether.

Conclusions

Ultramint X resulted in the most significant number of completely clean specimens.

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A new cleaning protocol in minimally invasive endodontic surgery: RUA (“retro irrigant activation”)
Dina Abdellatif, Davide Mancino, Massimo Pisano, Sara De Fontaine, Alfredo Iandolo
Journal of Conservative Dentistry and Endodontics.2025; 28(3): 297. CrossRef
Smear layer removal comparing conventional irrigation, passive ultrasonic irrigation, EndoActivator System, and a new sonic device (Perfect Clean System) by scanning electron microscopy: An ex vivo study
Bruna Fernanda Alionço Gonçalves, Divya Reddy, Ricardo Machado, Paulo César Soares Júunior, Sérgio Aparecido Ignácio, Douglas Augusto Fernandes Couto, Karine Santos Frasquetti, Vânia Portela Ditzel Westphalen, Everdan Carneiro, Ulisses Xavier da Silva Net
PLOS ONE.2024; 19(12): e0314940. CrossRef

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Color stability and solubility of Biodentine and NeoPutty in contact with different irrigation solutions: Sıla Nur Usta, Cangül Keskin; Restor Dent Endod 2024;49(3):e25. Published online June 19, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e25

Abstract PDF PubReader ePub: Objectives
This study aimed to evaluate the color stability and solubility of Biodentine and NeoPutty in contact with different irrigation solutions.
Materials and Methods
Biodentine and NeoPutty were set in cylindrical molds with 7 mm diameter and 1.5 mm high and immersed in distilled water, 17% ethylenediaminetetraacetic acid (EDTA), 2% chlorhexidine (CHX), 9% 1-hydroxyethylidene 1,1-diphosphonate (HEDP), and 5% sodium hypochlorite (NaOCl) solutions for 24 hours. The color change was measured with a spectrophotometer. The solubility values were calculated as the mass loss was expressed as a percentage of the original mass using an analytical balance with 10⁻⁴ g accuracy. Data were analyzed with Kruskal-Wallis followed by Mann-Whitney U tests, and 2-way analysis of variance test followed by Bonferroni corrections for pairwise comparisons for solubility and color stability with a 5% significance threshold, respectively.
Results
Biodentine exhibited higher color changes compared to the NeoPutty contact with all solutions except distilled water (p < 0.05). Both hydraulic cements (HCs) showed higher discoloration values immersion in CHX followed by NaOCl. No statistically significant difference was found between Biodentine and NeoPutty regardless of irrigation solution in terms of solubility (p > 0.05). Solubility values were lower in the distilled water group compared to EDTA and CHX (p < 0.05).
Conclusions
Tested HCs showed solubility and color changes at various rates. NeoPutty could be an appropriate material in aesthetic areas. The usage of HEDP as an irrigant solution can be considered suitable for various endodontic treatments due to its relatively lower solubility and discoloration values.

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Fracture resistance after root canal filling removal using ProTaper Next, ProTaper Universal Retreatment or hybrid instrumentation: an ex vivo study: Hadeel Hassan Hanafy, Marwa Mahmoud Bedier, Suzan Abdul Wanees Amin; Restor Dent Endod 2024;49(4):e38. Published online October 11, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e38

Abstract PDF PubReader ePub: Objectives
This study evaluated the effect of ProTaper Next (PTN), ProTaper Universal Retreatment (PTR) and hybrid instrumentation (HI) for canal filling removal on the fracture resistance (FR), mode of failure (MoF), and filling removal time.
Materials and Methods
Ninety-six, mandibular premolars were decoronated and randomly divided into 6 groups (n = 16), as follows: sound (S), untreated canals; prepared teeth (P), canals only prepared to ProTaper Universal finishing instrument (F4); endodontically-treated (ET), prepared and obturated canals using the single-cone technique; and groups PTN, PTR, and HI where filling was removed using PTN, PTR, or HI respectively. FR under vertical loading; MoF and time were assessed. Data were analyzed (Significance level [α] = 0.05).
Results
There was a significant difference in FR among all groups (p < 0.001) (HI < P < PTN < S < ET < PTR). HI showed lower FR than S, ET and PTR, and P showed lower FR than PTR (p < 0.05). For experimental groups, there was a significant difference between every group pair (p < 0.05) No significant difference was found regarding MoF distribution (p > 0.05). HI required the highest filling removal time, while PTR required the least (p < 0.05 between every group pair).
Conclusions
The effect of filling removal on FR may depend on the filling removal technique/system used. PTR could be faster and protect against fracture followed by PTN; HI could adversely affect FR. FR may be associated with filling removal time.

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Alkasite restorative material for endodontically treated teeth: a randomized controlled pilot study: Davi Ariel Nobuo Bepu, Renata Siqueira Scatolin, Natalia Saud Junqueira Franco, Luiza Pejon Sanchez, Aline Evangelista Souza-Gabriel, Silmara Aparecida Milori Corona; Restor Dent Endod 2024;49(3):e24. Published online June 11, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e24

Abstract PDF PubReader ePub: Objectives
This study aimed to evaluate the clinical performance of an alkasite restorative material in molars that had undergone root canal treatment.
Materials and Methods
The research was registered in Brazilian Registry of Clinical Trials. The randomized clinical trial involved 33 patients, each with at least 1 mandibular molar requiring restoration after receiving endodontic treatment. Patients were randomly assigned to receive either bulk-fill resin composite (Tetric N Ceram Bulk Fill, Ivoclar Vivadent) or the alkasite restorative material (Cention N, Ivoclar Vivadent). Upon completion of the restorations, 3 calibrated professionals utilized the United States Public Health Service criteria to assess various factors, including retention, secondary caries, marginal adaptation, restoration color, marginal pigmentation, and anatomical form. Evaluations were conducted at intervals of 7 days, 6 months, and 17 months. Additionally, the assessment encompassed the presence of radiolucent lines adjacent to the restoration, material deficiencies or excess, contact points, and caries recurrence. The data underwent analysis using the Friedman and Mann-Whitney tests (α = 0.05).
Results
After 17 months, the results revealed that the alkasite restorative material exhibited greater wear of anatomical shape compared to the bulk-fill resin composite (p = 0.0189). Furthermore, the alkasite restorative material significantly differed from the natural tooth color in most cases (p = 0.0000). However, no other criteria displayed significant differences between the materials or over time (p > 0.05).
Conclusions
The alkasite restorative material (Cention N) emerges as a viable option for restoring endodontically treated teeth, displaying clinically acceptable alterations after a 17-month evaluation period.
Trial Registration
Brazilian Registry of Clinical Trials (ReBEC) Identifier: RBR-97kx5jv

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Can discolored dental composites be bleached in depth?: Luca Giachetti, Daniele Scaminaci Russo, Michele Nieri, Francesca Cinelli; Restor Dent Endod 2024;49(3):e23. Published online June 11, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e23

Abstract PDF PubReader ePub: Objectives
Previous in vitro studies determined the whitening effects of bleaching products on stained resin composite surfaces. This in vitro study aimed to verify the effectiveness of a whitening system on composite resin previously subjected to pigmentation, specifically examining the depth of whitening effectiveness within the material structure.
Materials and Methods
A commercially available nano-filled composite resin was used. Specimens were stained using a coffee-based solution and a 10% carbamide peroxide-based gel was employed as the whitening agent. The pigment’s penetration and the effect of the bleaching gel were evaluated by measuring color (CieLab values) from the outer edge to the inner part of the specimens. Color measurements were taken at 14 points, starting from 0.1 mm from the external perimeter up to 3.0 mm.
Results
Analysis of variance tests showed a statistically significant difference between the Control Group (CG), Pigmentation Group, and Whitening Group. The whitening agent was effective up to 1.5 mm in depth, with Whiteness index (W) values not statistically different from those of CG up to 0.5 mm in depth.
Conclusions
Whitening agents on nano-filled resin composite previously pigmented appear effective in restoring the W to values similar to the original, particularly in the superficial layers of the sample.

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A global overview of enamel microabrasion for white spot lesions: a bibliometric review: Aurélio de Oliveira Rocha, Karina Cardoso, Michely Cristina Goebel, Pablo Silveira Santos, Lucas Menezes dos Anjos, Juliana Silva Ribeiro, Carla Miranda Santana, Mariane Cardoso; Restor Dent Endod 2024;49(3):e29. Published online July 11, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e29

Abstract PDF Supplementary Material PubReader ePub

This study aimed to identify and analyze articles on enamel microabrasion for the treatment of white spot lesions. A search was conducted on the Web of Science. The following parameters were recorded and analyzed: number of citations, year, journal, impact factor, study design, theme, country and continent, institution, authors, and keywords. Data was analyzed using VOSviewer software. The initial search resulted in 1,126 documents, of which 94 articles were included. The highest number of citations an article received was 65. The oldest article was published in 1975, and the most recent in 2023. The most frequent study design was case report (n = 42). Regarding the themes, it was observed that the main objective of the studies was to evaluate the clinical performance of enamel microabrasion (n = 75), primarily using Opalustre (Ultradent Products Inc., South Jordan, UT, USA) (n = 37) for treating white stains caused by dental fluorosis (n = 41). Most articles originated from Latin America (n = 31), mainly from Brazil (n = 26). The most frequent author was Sundfeld RH (n = 10). This study reveals research trends in the field of enamel microabrasion. The publications were mainly case reports/series using Opalustre for the removal of fluorosis stains.

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Impact of microabrasion and a remineralizing agent before in-office bleaching on hydrogen peroxide permeability, color alteration, and enamel morphology
Michael Willian Favoreto, Leticia Condolo, Camila Mendes Camargo, Rafael Rodrigues Lima, Karol Carrillo, Abraham Lincoln Calixto, Alessandra Reis, Alessandro D. Loguercio
Journal of Dentistry.2025; 156: 105655. CrossRef

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Procedural errors detected by cone beam tomography in cases with indication for retreatment: in vivo cross-sectional study: Henry Paul Valverde Haro, Carmen Rosa Garcia Rupaya, Flávio R. F. Alves; Restor Dent Endod 2024;49(3):e26. Published online June 24, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e26

Abstract PDF PubReader ePub

Objectives

This study aimed to investigate the frequency and type of endodontic procedural errors in cases indicated for retreatment through cone-beam computed tomography (CBCT) analysis.

Materials and Methods

The sample consisted of 96 CBCT scans, encompassing 122 permanent teeth with fully formed roots. Errors included perforation, instrument fracture, canal transportation, missed canals, and inadequate apical limit of filling. Additionally, potential risk factors were analyzed and subjected to statistical modeling.

Results

The most frequent procedural error observed was the inadequate apical limit of filling, followed by canal transportation, perforation, missed canal, and instrument fracture. Statistically significant associations were identified between various procedural errors and specific factors. These include canal transportation and root canal wall, with the buccal wall being the most commonly affected; missed canal and tooth type, particularly the palatine and second mesiobuccal canal canals; inadequate apical limit of filling and root curvature, showing a higher deviation to the mesial direction in severely curved canals; inadequate apical limit of filling and the presence of calcifications, with underfilling being the most frequent; canal transportation and periapical lesion, notably with deviation to the buccal direction; and the direction of perforation and periapical lesion, most frequently occurring to buccal direction.

Conclusions

CBCT emerges as a valuable tool in identifying procedural errors and associated factors, crucial for their prevention and management.

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ANALYSIS OF THE QUALITY OF ROOT CANAL OBTURATION AND PREVALENCE OF APICAL PERIODONTITIS IN ENDODONTICALLY TREATED TEETH
Cristina Coralia Nistor, Ioana Suciu , Elena Zabrac , Ruxandra Ioana Bartok , Bogdan Dimitriu , Andreea Baluta
Romanian Journal of Oral Rehabilitation.2024; 16(4): 311. CrossRef

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Success rates comparison of endodontic microsurgery and single implants with comprehensive and explicit criteria: a systematic review and meta-analysis: Min Jung Ko, Ju Hyun Park, Na Rae Lee, Joon-Ho Yoon, Young-Taek Kim, Sin-Yeon Cho; Restor Dent Endod 2025;50(1):e8. Published online February 19, 2025; DOI: https://doi.org/10.5395/rde.2025.50.e8

Abstract PDF Supplementary Material PubReader ePub: Objectives
While the success criteria of endodontic microsurgery (EMS) have been consistently defined and widely accepted, the success criteria of dental implants are outdated and focus only on the implant fixture and surrounding bone. This study aimed to evaluate the outcomes of EMS and single implants (SIs) with explicit criteria.
Methods
We searched for articles published from January 2010 to February 2022 and discussed them and consulted with a clinical advisory committee composed of four dental specialists and one epidemiologist during article selection and data extraction.
Results
Twenty-two EMS studies and six SI studies were included in the meta-analysis. Teeth treated using EMS had a pooled success rate of 89% (90% at <5-year follow-up and 80% at ≥5-year follow-up) and the pooled success rate of SI was 78%.
Conclusions
The success rates of the two procedures with similar follow-up periods were comparable. Subgroup analysis found no other variable that significantly influenced study heterogeneity. Considering the treatment sequence and the similar success rates, it would be advantageous to consider EMS, rather than implants, first in a situation where both procedures are applicable.

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Histological evaluation of pulp response to alendronate and Biodentine as pulp capping agents: an animal study: Thangavel Boopathi, Sekar Manimaran, Joseline Charles Kerena, Mathew Sebeena, Kumaravadivel Karthick, Natesan Thangaraj Deepa; Restor Dent Endod 2024;49(4):e39. Published online October 29, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e39

Abstract PDF PubReader ePub: Objectives
This study aimed to comparatively assess the histological response of the pulp toward alendronate and Biodentine in a direct pulp capping procedure.
Materials and Methods
Twenty-four anterior teeth from 6 New Zealand rabbits were used in this study. Firstly, all rabbits were anesthetized according to their weight. Class V cavities were prepared on the buccal surfaces of anterior teeth. A pin-point exposure of the pulp was then made using a small, sterile round carbide bur and bleeding was arrested with a saline-soaked, sterile cotton pellet. The teeth under study were divided into 2 groups (n = 12). The intentionally exposed pulp was capped with alendronate (Group 1) and Biodentine (Group 2), correspondingly. After 30 days, all rabbits were euthanized; the teeth under study were extracted and taken up for histological analysis.
Results
Biodentine showed an intact, very dense dentin bridge formation with a uniform odontoblast (OD) layer pattern and mild or absent inflammatory response whereas specimens capped with alendronate demonstrated a dense dentin bridge formation with non-uniform OD layer pattern and mild to moderate inflammatory response.
Conclusions
Biodentine showed more biocompatibility than alendronate. However, alendronate can initiate reparative dentin formation and may be used as an alternative pulp capping agent.

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Push-out bond strength and intratubular biomineralization of a hydraulic root-end filling material premixed with dimethyl sulfoxide as a vehicle: Ju-Ha Park, Hee-Jin Kim, Kwang-Won Lee, Mi-Kyung Yu, Kyung-San Min; Restor Dent Endod 2023;48(1):e8. Published online January 20, 2023; DOI: https://doi.org/10.5395/rde.2023.48.e8

Abstract PDF PubReader ePub

Objectives

This study was designed to evaluate the parameters of bonding performance to root dentin, including push-out bond strength and dentinal tubular biomineralization, of a hydraulic bioceramic root-end filling material premixed with dimethyl sulfoxide (Endocem MTA Premixed) in comparison to a conventional powder-liquid–type cement (ProRoot MTA).

Materials and Methods

The root canal of a single-rooted premolar was filled with either ProRoot MTA or Endocem MTA Premixed (n = 15). A slice of dentin was obtained from each root. Using the sliced specimen, the push-out bond strength was measured, and the failure pattern was observed under a stereomicroscope. The apical segment was divided into halves; the split surface was observed under a scanning electron microscope, and intratubular biomineralization was examined by observing the precipitates formed in the dentinal tubule. Then, the chemical characteristics of the precipitates were evaluated with energy-dispersive X-ray spectroscopic (EDS) analysis. The data were analyzed using the Student’s t-test followed by the Mann-Whitney U test (p < 0.05).

Results

No significant difference was found between the 2 tested groups in push-out bond strength, and cohesive failure was the predominant failure type. In both groups, flake-shaped precipitates were observed along dentinal tubules. The EDS analysis indicated that the mass percentage of calcium and phosphorus in the precipitate was similar to that found in hydroxyapatite.

Conclusions

Regarding bonding to root dentin, Endocem MTA Premixed may have potential for use as an acceptable root-end filling material.

Citations

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Effectiveness of Sectioning Method and Filling Materials on Roughness and Cell Attachments in Root Resection Procedure
Tarek Ashi, Naji Kharouf, Olivier Etienne, Bérangère Cournault, Pierre Klienkoff, Varvara Gribova, Youssef Haikel
European Journal of Dentistry.2025; 19(01): 240. CrossRef
Bond Strength and Adhesive Interface Quality of New Pre‐Mixed Bioceramic Root Canal Sealer
Gustavo Creazzo, Bruna Monteiro de Barros Ciribelli Alves, Helena Cristina de Assis, Karen Gisselle Garay Villamayor, Manoel Damião de Sousa‐Neto, Jardel Francisco Mazzi‐Chaves, Fabiane Carneiro Lopes‐Olhê
Microscopy Research and Technique.2025;[Epub] CrossRef
Evaluation of the root dentin bond strength and intratubular biomineralization of a premixed calcium aluminate-based hydraulic bioceramic endodontic sealer
Yu-Na Lee, Min-Kyeong Kim, Hee-Jin Kim, Mi-Kyung Yu, Kwang-Won Lee, Kyung-San Min
Journal of Oral Science.2024; 66(2): 96. CrossRef
Removal efficiency of a fast setting pozzalan-based bioactive cement: a micro CT study
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