Comparative evaluation of pediatric endodontic rotary file systems to bending and torsion tests: A finite element analysis

Q1 Medicine

Journal of oral biology and craniofacial research Pub Date : 2024-09-25 DOI:10.1016/j.jobcr.2024.09.010

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Abstract

Background and objective

The introduction of Paediatric NiTi instruments has transformed the field of paediatric endodontics. However, no studies are available on the mechanical behaviour of these files, wherein Finite Element Analysis (FEA) was found to play a major role. The objective of this study is to evaluate the mechanical behavior of three commercially available pediatric endodontic rotary file systems to bending and torsion stress analysis test through Finite Element Analysis (FEA).

Methods

A Finite Element Analysis study was performed on three commercially available pediatric endodontic rotary files (Pro AF baby, Kedo SG and Neoendo pedoflex) available for cleaning and shaping the narrow root canals of the deciduous teeth to bending and torsion tests with the boundary conditions according to ISO 3630-1 specifications.

Results

In the bending analysis, Pro AF baby files were found to withstand the complete bending tests without yielding with a maximum von Mises stress of 1366 MPa, and Kedo SG, Neoendo Pedoflex file exhibited maximum von Mises stress of 2296 MPa, 1971 MPa. Under torsion tests Kedo SG exhibited maximum stress distribution, while Neoendo Pedoflex and Pro AF baby files exhibited similar stress distribution.

Conclusion

Pro AF baby file effectively withstood the rigorous 45 -degree bending examination without experiencing yielding, while Kedo SG file exhibited higher flexibility. Under torsional resistance test, all the three instruments exhibited similar stress distribution under the yield limit. In summary, the mechanical behaviour (bending and torsion) of pediatric rotary file systems were influenced by design of the files.

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儿科牙髓旋转锉系统在弯曲和扭转测试中的比较评估：有限元分析

背景和目的儿童镍钛器械的引入改变了儿童牙髓病学领域。然而，目前还没有关于这些锉的机械性能的研究，而有限元分析（FEA）在其中发挥了重要作用。本研究的目的是通过有限元分析（FEA）评估三种市售儿童牙髓旋转锉系统在弯曲和扭转应力分析测试中的机械性能。方法对三种市售儿童牙髓旋转锉（Pro AF baby、Kedo SG 和 Neoendo pedoflex）进行了有限元分析研究，这些锉可用于清洁和修整乳牙的狭窄根管，并根据 ISO 3630-1 规范进行弯曲和扭转测试。结果在弯曲分析中，发现 Pro AF 宝宝牙粉能承受完全弯曲测试而不屈服，最大 von Mises 应力为 1366 兆帕，而 Kedo SG 和 Neoendo Pedoflex 牙粉的最大 von Mises 应力分别为 2296 兆帕和 1971 兆帕。在扭转测试中，Kedo SG 表现出最大的应力分布，而 Neoendo Pedoflex 和 Pro AF 婴儿锉表现出相似的应力分布。在抗扭测试中，三种器械在屈服极限下的应力分布相似。总之，儿科旋转锉系统的机械性能（弯曲和扭转）受锉刀设计的影响。

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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.