F. Cruzado-Oliva, Alexander Vega-Anticona, David Arturo Ortiz-Diaz, Luisfelipe Carlos Alarco-Jurado, H. Arbildo-Vega
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引用次数: 0
摘要
迄今为止,关于在修复牙髓治疗后牙冠严重破坏的上颌切牙时,玻璃纤维桩的最佳长度应达到怎样的临床效果,还没有明确的共识。本研究旨在通过有限元分析确定不同长度玻璃纤维桩的应力分布。研究人员创建了五个三维有限元模型(A-E 组),每个模型代表一个牙髓治疗上颌中切牙的修复系统。这些模型包括冠根比分别为 1/3、1/2、2/3、4/5 和 1/1 的后核冠。在与牙齿长轴成 45º 角的腭面上施加 100N 的静态载荷。分别评估了牙冠、牙本质、树脂粘结剂和后牙髓的 Von Mises 值和最大应力。A 柱的 Von Mises 应力位于颊中上三分之一处和腭尖三分之一处,B、C、D 和 E 柱的 Von Mises 应力位于颊中上三分之一处和腭尖三分之一处。
Current Perspective on Fiberglass Posts Length: Finite Element Study
The literature to date has not reported a clear consensus on the optimal length of fiberglass posts for efficient clinical performance when restoring endodontically treated maxillary incisors with severe crown destruction. This study aimed to determine the stress distribution of fiberglass posts at different lengths using finite element analysis. Five 3D finite element models (groups A-E) were created, each representing a restoration system for endodontically treated maxillary central incisors. The models included post-core crowns with crown-root ratios of 1/3, 1/2, 2/3, 4/5, and 1/1. A static load of 100N force was applied to the palatal surface at 45º to the long axis of the tooth. Von Mises values and | maximum stresses in the crown, dentin, resin cement, and post-core were evaluated separately. The maximum stress experienced was A < C < B < E < D. Von Mises stresses were located in the upper and middle buccal thirds and in the apical palatal third of post A, as well as the upper and middle buccal thirds in posts B, C, D, and E. The lowest distribution of maximum and Von Mises stresses was observed in model A.