Evaluation of cyclic fatigue in three pediatric endodontic rotary file systems in root canals of primary molars: A finite element analysis (FEA)

Q1 Medicine

Journal of oral biology and craniofacial research Pub Date : 2025-02-11 DOI:10.1016/j.jobcr.2025.01.023

S.S. Monika sri, K.C. Vignesh, K. Vivek, Kavitha Swaminathan, Selvakumar Haridoss

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引用次数: 0

Abstract

Objective

The aim of this study was to evaluate the cyclic fatigue resistance of three different pediatric endodontic rotary files in the root canals of primary molars using finite element analysis (FEA). The research focuses on understanding the mechanical behavior of the files under varying canal curvatures to determine their suitability for pediatric endodontics.

Methods

Finite Element Analysis (FEA) was utilized to simulate cyclic fatigue performance in primary molar canals with curvatures of 30°, 60°, and 90°. The rotary files made up of nickel-titanium (NiTi) alloys included in this study were Kedo SG, Neoendo Pedo Flex, and Pro AF Baby. Stress distribution, maximum stress values, and cyclic fatigue resistance were evaluated to identify differences in performance. Simulations were conducted under controlled conditions to model real-world clinical scenarios. Stress distribution and the number of cycles until failure were analyzed using Goodman's fatigue model and the S-N curve.

Results

The Pro AF Baby files exhibited the highest cyclic fatigue resistance and the more favourable stress distribution across all canal profiles, due to its triangular cross-sectional geometry. Whereas, Kedo SG and Neoendo Pedo Flex demonstrated higher stress levels and lower fatigue life, particularly in severe curvatures (90°), indicating increased susceptibility to failure. Elevated stress concentrations were observed near the apical tip, correlating with reduced fatigue life as canal curvature increased.

Conclusion

Pro AF Baby B2 demonstrated better fatigue resistance and safety for endodontic procedures in primary molars with complex root canal curvatures. These findings emphasize the importance of material properties and file design in improving clinical outcomes. Future research should focus on long-term clinical validation and further optimization of rotary file systems for pediatric dentistry.

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三种儿童根管根管根管根管旋转锉系统的循环疲劳评价：有限元分析（FEA）

目的应用有限元分析方法评价三种不同牙髓治疗旋转锉在儿童磨牙根管内的抗循环疲劳性能。研究的重点是了解锉在不同管曲率下的力学行为，以确定其适用于儿童牙髓学。方法采用有限元分析方法对弯曲度为30°、60°和90°的初级磨牙根管进行循环疲劳模拟。本研究采用镍钛（NiTi）合金制成的旋转锉有Kedo SG、Neoendo Pedo Flex和Pro AF Baby。对应力分布、最大应力值和循环疲劳抗力进行了评估，以确定性能差异。模拟在受控条件下进行，以模拟真实的临床场景。采用Goodman疲劳模型和S-N曲线分析了试件的应力分布和破坏循环次数。结果Pro AF Baby锉具有最高的抗循环疲劳性能，并且由于其三角形的横截面几何形状，在所有根管剖面上具有更有利的应力分布。然而，Kedo SG和Neoendo Pedo Flex表现出更高的应力水平和更低的疲劳寿命，特别是在严重曲率（90°）下，这表明更容易发生故障。在根尖附近观察到应力浓度升高，随着根管曲率的增加，疲劳寿命降低。结论pro AF Baby B2在复杂根管曲率的磨牙根管治疗中具有较好的抗疲劳性和安全性。这些发现强调了材料特性和文件设计在改善临床结果中的重要性。未来的研究应集中在长期的临床验证和进一步优化儿科牙科旋转文件系统。

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 oral biology and craniofacial research Medicine-Otorhinolaryngology

CiteScore

4.90

自引率

0.00%

发文量

133

审稿时长

167 days

期刊介绍： Journal of Oral Biology and Craniofacial Research (JOBCR)is the official journal of the Craniofacial Research Foundation (CRF). The journal aims to provide a common platform for both clinical and translational research and to promote interdisciplinary sciences in craniofacial region. JOBCR publishes content that includes diseases, injuries and defects in the head, neck, face, jaws and the hard and soft tissues of the mouth and jaws and face region; diagnosis and medical management of diseases specific to the orofacial tissues and of oral manifestations of systemic diseases; studies on identifying populations at risk of oral disease or in need of specific care, and comparing regional, environmental, social, and access similarities and differences in dental care between populations; diseases of the mouth and related structures like salivary glands, temporomandibular joints, facial muscles and perioral skin; biomedical engineering, tissue engineering and stem cells. The journal publishes reviews, commentaries, peer-reviewed original research articles, short communication, and case reports.