Journal of Operative Dentistry & Endodontics

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2022 | January-June | Volume 7 | Issue 1

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ORIGINAL RESEARCH

Mohammed Naumaan Mujawar, Manje Gowda, Jayalakshmi Kulambi Basavangowda, Prasanna Latha Nadig, Shibani Shetty

Cone-beam Computed Tomographic Analysis of Apical Transportation and Centering Ratio of TruNatomy and V-taper 2H NiTi Rotary Systems in Curved Canals: An In Vitro Study

[Year:2022] [Month:January-June] [Volume:7] [Number:1] [Pages:5] [Pages No:1 - 5]

Keywords: Canal transportation, Centering ability, TruNatomy, V-Taper 2H

   DOI: 10.5005/jp-journals-10047-0120  |  Open Access |  How to cite  | 

Abstract

Aim: This study aimed to compare the canal transportation and centering ratio using cone-beam computed tomography (CBCT) in the preparation of curved root canals after instrumentation with TruNatomy (TN) and V-Taper 2H (VT) files. Materials and methods: Twenty mandibular molar mesiobuccal canals with an angle of curvature ranging from 20 to 40° were split into two groups of 10 samples each based on the file system used to prepare the canals: TN (group I) and VT (group II). The teeth were instrumented according to the manufacturer's instructions up to 26 no. in TN and 25 no. in VT apical preparation. Before and after preparation, canals were examined using CBCT to assess the transportation and centering ratio at 3, 5, and 7 mm from the apex. The degree of transportation and the capacity for centering were evaluated. The two groups were statistically compared with the Mann–Whitney and Friedman's tests. Results: Both instruments did not deviate from the original canal curvature having no significant difference in the apical transportation and remained centered in the canal. Conclusion: TruNatomy and VT instruments produced less transportation and remained centered around the original canal to a great degree due to their cross-section, heat treatment, and reduced taper.

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ORIGINAL RESEARCH

Vibha Hegde, Mrunalini J Vaidya, Komal Sanjay Jadhav

Microtensile Bond Strength of Packable and Flowable Bulk-fill Composite Resin-based Restorative Materials to Dentin

[Year:2022] [Month:January-June] [Volume:7] [Number:1] [Pages:5] [Pages No:6 - 10]

Keywords: Bulk-fill composites, Microtensile bond strength, Universal testing machine

   DOI: 10.5005/jp-journals-10047-0123  |  Open Access |  How to cite  | 

Abstract

Aim: Comparative assessment of microtensile bond strength of packable and flowable bulk-fill composite resin restorative materials to dentin in a Class II cavity. Materials and methods: Standardized independent class II tooth preparations were done involving both the proximal surfaces of 126 teeth to prepare 252 specimens. The 252 specimens were divided into seven groups of 36 specimens each as follows: group I—Filtek Z350XT packable conventional composite resin, group II—Filtek Bulk-Fill, group III—Tetric-N-Ceram Bulk-Fill, group IV—everX Posterior highly viscous fiber reinforced bulk-fill, group V—SDR Plus bulk-fill flowable, group VI—Tetric N Flow flowable bulk-fill, group VII—Filtek Bulk-Fill flowable. For group I, the mesial and distal cavities were etched with 37% phosphoric acid for 20 seconds followed by the application of single bond universal bonding agent. The cavities in group I were restored by 2 mm incremental placement of conventional nanofilled composite resin and light cured for 20 seconds. For group II–VII, the cavities were restored by bulk-fill composite resin-based restorative materials in a single increment of 4 mm and light polymerized for 20 seconds. The restored specimens were sectioned using a diamond disc creating a 1 mm thick slabs. The evaluation of the microtensile bond strength (µTBS) was done using the universal testing machine until debonding occurred at the dentin restoration interface. Results: A statistically highly significant difference was observed in the values among the groups (p < 0.01) with the highest values in group II and the least in group VII. Conclusion: The bulk-fill packable composite resin-based restorative materials were found to have highest µTBS as compared with the other bulk-fill composite resin-based restorative materials.

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CASE REPORT

Krishnamoorthy Kunguma Supraja, Raja Sethupathi, Davidson Diana, Manali Ramakrishnan Srinivasan

Management of Separated Instrument at Apical Third of a Mandibular Molar by Intentional Replantation: A Case Report

[Year:2022] [Month:January-June] [Volume:7] [Number:1] [Pages:5] [Pages No:11 - 15]

Keywords: Instrument separation, Intentional replantation, Rotary, Nickel-titanium, Root canal treatment

   DOI: 10.5005/jp-journals-10047-0121  |  Open Access |  How to cite  | 

Abstract

Endodontic mishaps during root canal treatment are the most commonly encountered errors, affecting the treatment quality and possibly posing a risk to the patient's health. Separation of an endodontic instrument during the root canal therapy is one such frequently encountered mishap. Clinicians should assess the risk over benefit, while attempting non-surgical instrument retrieval at apical third. Exceptionally, endodontic periradicular surgery is not always feasible due to anatomic limitations. In such circumstances intentional replantation might be an alternative. This case report presents the successful management of an endodontic mishap through intentional replantation.

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CASE REPORT

Cesar Andre Zevallos-Quiroz, Abel Teves-Cordova

Single-appointment Treatment for Root Perforation in High Esthetic Zone Using Polytetrafluoroethylene and Calcium Silicate-based Material

[Year:2022] [Month:January-June] [Volume:7] [Number:1] [Pages:6] [Pages No:16 - 21]

Keywords: Endodontic, Incisor, Perforation, Retreatment

   DOI: 10.5005/jp-journals-10047-0122  |  Open Access |  How to cite  | 

Abstract

Aim: To describe and discuss the management of root perforation in the cervical third of a high esthetic demand zone in the maxillary incisor teeth. Background and objectives: Biodentine is a calcium silicate-based repair material that requires a short setting time. This material has the advantage of setting in a matter of minutes without causing long-term discoloration, and exhibits biocompatibility similar to mineral trioxide aggregate (MTA). Polytetrafluoroethylene (PTFE) is a fluorocarbon solid, nontoxic to humans, highly resistant to heat and chemicals, and is used in dentistry as a barrier in adhesive restorations. We describe and discuss the management of root perforation in the cervical third of a high esthetic demand zone in the maxillary incisor teeth using these materials. Case description: The present manuscript describes a technique in three cases of root perforation treated in a single-session appointment with Biodentine in combination with PTFE, that is utilized as a barrier to prevent the calcium silicate-based repair material from penetrating the root canal until the material fully sets, then the endodontic retreatment can be completed. Conclusion: The technique described using PTFE as a barrier was effective to prevent the calcium silicate-based repair material Biodentine from penetrating the root canal during endodontic retreatment. Clinical significance: Root perforation can be treated in a single session using PTFE and calcium silicate-based.

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