A comparative evaluation of the dentinal microcracks formed and propagated during the removal of gutta-percha using hand and three rotary retreatment file systems: A micro-computed tomography study

Q3 Dentistry

Endodontology Pub Date : 2023-07-01 DOI:10.4103/endo.endo_192_22

Srivastava Sanjeev, Rita Gupta, Dubey Sandeep, Tewari Tanu, Shukla Namita, Singh Arohan

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引用次数: 0

Abstract

Aim: This micro-computed tomography (micro-CT) study aims to quantitatively analyze the dentinal microcracks formed and propagated after endodontic retreatment using different file systems. Methods: Forty extracted mandibular premolars were selected. Biomechanical preparation was done using ProTaper Next rotary files followed by obturation using lateral compaction technique. All specimens were randomly divided into four groups (n = 10) and scanned under 1172; Micro-CT (Skyscan Bruker, Kontich, Belgium). After scanning, the first group was retreated using Hedstrom (H) files (Dentsply Maillefer, Ballaigues, Switzerland), the second group with Gutta Percha Remover (GPR) files (Mani Inc., Japan), the third group with Endostar RE Re Endo Rotary system (RE Endo files) (Endostar RE, Poland), and fourth group with ProTaper Universal Retreatment (PTUR) files (Dentsply Maillefer, Ballaigues, Switzerland). A micro-CT scan was repeated of each sample to observe the newly formed and propagated microcracks. The micro-CT scans before and post retreatment were then evaluated using CT-analyzer software. Data were compared using the Chi-square test. Results: New microcracks formed post retreatment were maximum in the RE Endo group followed by the PTUR group, GPR group, and least in the H file group. Propagation of existing microcracks after retreatment was maximum in the RE Endo group followed by nearly similar in both the GPR group and PTUR group and least in the H file group. On comparing the frequency distribution of the newly formed and propagated microcracks, the Chi-square test showed similar distribution among all four groups, which was found statistically insignificant (P > 0.05). Conclusion: GPR rotary instrument group created the least new microcracks among tested retreatment rotary files. However, the propagation of microcracks was found comparable with the PTUR files.

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用手和三种旋转式再处理锉系统去除杜仲胶过程中形成和扩展的牙本质微裂纹的比较评价:一项微型计算机断层扫描研究

目的：本研究旨在使用不同的文件系统定量分析牙髓再治疗后形成和扩展的牙本质微裂纹。方法：选择40颗拔除的下颌前磨牙。使用ProTaper Next旋转锉进行生物力学准备，然后使用侧向压实技术进行充填。所有标本随机分为四组（n=10），在1172下扫描；微型CT（Skyscan Bruker，Kontich，比利时）。扫描后，第一组使用Hedstrom（H）文件（Dentsply Maillefer，Ballaigues，Switzerland），第二组使用Gutta Percha Remover（GPR）文件（Mani股份有限公司，日本），第三组使用Endostar RE-RE-Endo Rotary系统（RE-Endo文件）（Endostar RE，Poland），第四组使用ProTaper通用再治疗（PTUR）文件（Dentsply-Maillefer，Ballaigues，瑞士）。对每个样品重复进行微CT扫描，以观察新形成和扩展的微裂纹。然后使用CT分析仪软件评估再治疗前后的显微CT扫描。使用卡方检验对数据进行比较。结果：再处理后形成的新微裂纹在RE-Endo组中最大，其次是PTUR组、GPR组，而在H file组中最小。RE-Endo组再处理后现有微裂纹的扩展最大，其次是GPR组和PTUR组，H file组最小。通过比较新形成和扩展的微裂纹的频率分布，卡方检验显示四组之间的分布相似，但统计学意义不显著（P>0.05）。结论：GPR旋转仪器组在测试的再处理旋转锉中产生的新微裂纹最少。然而，发现微裂纹的扩展与PTUR文件相当。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Endodontology Medicine-Anatomy

CiteScore

0.60

自引率

0.00%

发文量

审稿时长

28 weeks