The Novel Assessment to Explore the Cutting Performance of Rotary Instruments Using Dynamic Finite Element Analysis With Failure Mode.

IF 3.5 2区 医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE
Chih-Wen Chi, Weng-Pin Chen, Wei-Ting Liu, Ting-Ju Lai, Chun-Pin Lin
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Abstract

Introduction: The separation of Nickel-Titanium (NiTi) endodontic instruments due to excessive torque adversely affects treatment outcomes. Previous studies have analyzed torque values under static conditions and failed to accurately simulate the dynamic conditions of instruments within root canals. This study aimed to apply a novel finite element analysis (FEA) to assess the real-time dynamic performance of NiTi endodontic instruments during operation in root canals.

Methods: In this study, three-dimensional geometric models of commercial NiTi endodontic instruments (ProTaper Universal) and simulated root canals were developed. In the first part, dynamic analyses of the instruments operating within root canals were simulated using finite element fracture theory and validated through experimental methods. To assess the consistency between the experimental results generated by different instruments (ProTaper Universal SX, S1, S2, and F1) and the FEA results, we utilized Bland-Altman plots for visualization and the Intraclass Correlation Coefficient for comparing continuous data. In the second part, the FEA was employed to establish a safe and efficient sequence for root canal shaping.

Results: The findings indicated a similar trend between the analyzed and experimental groups. The Bland-Altman plot demonstrated a high level of consistency, with Intraclass Correlation Coefficient values ranging from 0.6407 to 0.9351. To evaluate the dynamic performance of commercial endodontic instruments in canals, the instruments experienced excessive torque values and significant loading. Based on torque control, new sequences for safe and effective root canal preparation were proposed.

Conclusion: FEA with failure mode was demonstrated to simulate the real-time dynamic performance of instruments working in the simulated canals. This assessment offers guidance for clinical protocols and the development of innovative instruments with improving safety and efficacy in endodontic treatments through computer-aided techniques.

采用带失效模式的动态有限元分析方法对旋转仪器的切削性能进行了新的评估。
简介:镍钛根管器械由于扭矩过大导致的分离会对治疗效果产生不利影响。以往的研究分析的是静态条件下的扭矩值,无法准确模拟根管内器械的动态情况。本研究旨在应用一种新颖的有限元分析(FEA)来评估镍钛根管器械在根管内操作过程中的实时动态性能。方法:在本研究中,建立了商用镍钛根管器械(ProTaper Universal®)的三维几何模型和模拟根管。在第一部分中,采用有限元断裂理论模拟根管内操作器械的动态分析,并通过实验方法进行验证。为了评估不同仪器(PTU SX、S1、S2和F1)产生的实验结果与FEA结果之间的一致性,我们使用Bland-Altman图进行可视化,并使用class内相关系数(ICC)对连续数据进行比较。第二部分采用有限元方法建立安全高效的根管成形程序。结果:研究结果表明,分析组和实验组之间的趋势相似。Bland-Altman图显示了高度的一致性,ICC值在0.6407到0.9351之间。为了评估商品根管内根管器械的动态性能,这些器械经历了过大的扭矩值和显著的负载。在力矩控制的基础上,提出了安全有效的根管预备程序。结论:采用失效模式的有限元分析方法可以模拟仪器在模拟管中工作的实时动态性能。该评估为临床方案和创新仪器的开发提供了指导,通过计算机辅助技术提高了根管治疗的安全性和有效性。
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
Journal of endodontics
Journal of endodontics 医学-牙科与口腔外科
CiteScore
8.80
自引率
9.50%
发文量
224
审稿时长
42 days
期刊介绍: The Journal of Endodontics, the official journal of the American Association of Endodontists, publishes scientific articles, case reports and comparison studies evaluating materials and methods of pulp conservation and endodontic treatment. Endodontists and general dentists can learn about new concepts in root canal treatment and the latest advances in techniques and instrumentation in the one journal that helps them keep pace with rapid changes in this field.
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