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首页> 外文期刊>Journal of Biomechanics >Finite element simulation of the behavior of the periodontal ligament: A validated nonlinear contact model
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Finite element simulation of the behavior of the periodontal ligament: A validated nonlinear contact model

机译：牙周膜行为的有限元模拟：一个经过验证的非线性接触模型

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摘要

Due to its significance in tooth movement, the stress/deformation field of periodontium and the alveolar bone remodeling process, periodontal ligament (PDL) cannot be excluded from the studies investigating dental biomechanics regarding its excessive deformability. Therefore, many analytical and numerical researches are carried out to simulate its response and to create a constitutive model via experiments intending to discover the material properties of PDL. The aim of this study is to formulate a user specified contact model that can be used in conjunction with finite element (FE) software and reflects PDL's influence on neighboring structures based on the currently available information, without requiring an actual volumetric finite element mesh of ligament. The results show good agreement with available experimental tooth mobility data. Smooth stress fields are obtained on the tooth root and alveolar bone, which is a significant aspect in bone-remodeling studies. The advantage of simulating PDL as a contact model at the interface of tooth root and the alveolar process instead of a solid-meshed FE model with poor geometric morphology and/or very dense mesh is expected to save pre/post-processing workforce, to increase the accuracy and to contribute to the smoothness of interface stress distributions.
机译：由于其在牙齿运动，牙周膜的应力/变形场以及牙槽骨重塑过程中的重要性，因此不能排除因其过度可变形性而研究牙齿生物力学的研究中的牙周膜（PDL）。因此，进行了许多分析和数值研究来模拟其响应并通过旨在发现PDL材料特性的实验来创建本构模型。这项研究的目的是制定一个用户指定的接触模型，该模型可以与有限元（FE）软件结合使用，并根据当前可用信息反映PDL对相邻结构的影响，而无需实际的韧带体积有限元网格。结果表明与现有的实验牙齿活动性数据吻合良好。在牙根和牙槽骨上获得了平滑的应力场，这是骨骼重塑研究的重要方面。将PDL模拟为齿根和牙槽突界面的接触模型而不是几何形态差和/或网眼密度高的实体网格有限元模型的优势有望节省前/后加工劳动力，从而增加精度并有助于界面应力分布的平滑性。

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