Occlusal Loading Effect on Stress Distribution of Endodontically Treated Teeth: Finite Element Analysis Study.

IF 1.1 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

European Journal of Prosthodontics and Restorative Dentistry Pub Date : 2024-02-29 DOI:10.1922/EJPRD_2578Wendling07

M M Wendling, G Mantovani, B V Fernandes, D E Carneiro, R V Santos, A Sánchez-Ayala

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引用次数: 0

Abstract

Aim: Evaluate the influence of occlusal loading on the stress distribution of endodontically treated teeth after root canal preparation with different file's sizes and tapers by means of finite element analysis.

Methodology: Seven three-dimensional models of a single-rooted, single-canal lower second premolar were established, one healthy control and six endodontically treated and restored models. The shape of root canal preparations followed file configurations 30/.05, 30/.09, 35/.04, 35/.06, 40/.04, and 40/.06. Von- Mises equivalent stresses were calculated by applying 30 N, 90 N and 270 N loads to the buccal cusp tip, each one at 90º, 45º and 20º angles from the occlusal plane simulating occlusion, dental interference and laterality, respectively.

Results: 45º loading was more prone to formation of higher stress values. The simulation of occlusion and laterality resulted in maximum stress areas located at the inner side of the root curvature, while under occlusal interference they were on the lingual surface over the tooth's long axis.

Conclusions: The angulation of occlusal loading and magnitude were determinants for stress distribution on dental structure. Both variations of size and taper were not determinants for the increase in the maximum stress areas.

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咬合负荷对正畸治疗牙齿应力分布的影响：有限元分析研究。

目的：采用有限元分析方法，评价不同锉刀大小和锥度的根管预备后，咬合载荷对根管治疗牙齿应力分布的影响。方法：建立7个单根、单管下第二前磨牙的三维模型，1个健康对照和6个根管治疗和修复模型。根管制剂的形状遵循文件配置30/.05、30/.09、35/.04、35/.06、40/.04和40/.06。Von-Mises等效应力是通过向颊侧牙尖顶施加30N、90N和270N的载荷来计算的，每个载荷分别与咬合平面成90º、45º和20º角，模拟咬合、牙齿干扰和偏侧性。结果：45º加载更容易形成更高的应力值。咬合和偏侧性的模拟导致最大应力区域位于牙根弯曲的内侧，而在咬合干扰下，它们位于牙齿长轴上的舌表面。结论：咬合负荷的角度和大小是牙齿结构应力分布的决定因素。尺寸和锥度的变化都不是最大应力区域增加的决定因素。

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

European Journal of Prosthodontics and Restorative Dentistry DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

2.30

自引率

7.70%

发文量

期刊介绍： The European Journal of Prosthodontics and Restorative Dentistry is published quarterly and includes clinical and research articles in subjects such as prosthodontics, operative dentistry, implantology, endodontics, periodontics and dental materials.