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首页> 外文期刊>Journal of Biomechanics >Generic finite element models of orthodontic mini-implants: Are they reliable?
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Generic finite element models of orthodontic mini-implants: Are they reliable?

机译：正畸微型植入物的通用有限元模型：它们可靠吗？

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摘要

Many finite element (FE) studies used different settings for modeling orthodontic mini-implants (OMIs). This study aims to compare different approaches for modeling OMI with FE method, to exhibit the role of key factors in modeling process. A computerized tomography (CT) dataset of a living human is used to develop subject-specific FE model of bone specimen, and a microCT was used to generate the geometry of OMI. Another five models were developed to assess the effect of changing different settings of FE modeling process. These five models differed from the subject-specific model in either: (i) bone properties' assignment method, (ii) geometries and constrains' conditions, or (iii) simulation method of bone-implant contact (BIC). The models presented significant differences in maximum principal strain distribution. These differences were most apparent when the models differed either in the nature of BIC or the method of assigning bone properties. The models different only in bone geometries showed differences in the intensity of strain rather than its distribution pattern. There is a need for assessment and validation of all FE modeling approaches currently used for simulation of mechanical environment in the bone surrounding OMIs. (C) 2015 Elsevier Ltd. All rights reserved.
机译：许多有限元（FE）研究使用不同的设置来建模正畸微型植入物（OMI）。本研究旨在比较采用有限元方法对OMI进行建模的不同方法，以展示关键因素在建模过程中的作用。使用活人的计算机断层扫描（CT）数据集来开发特定于受试者的骨骼标本有限元模型，并使用microCT生成OMI的几何形状。开发了另外五个模型来评估更改有限元建模过程的不同设置的影响。这五个模型在以下方面与特定于受试者的模型不同：（i）骨骼属性的分配方法，（ii）几何形状和约束条件，或（iii）骨-植入物接触（BIC）的模拟方法。这些模型在最大主应变分布上存在显着差异。当模型在BIC的性质或分配骨骼属性的方法上有所不同时，这些差异最为明显。仅在骨骼几何形状上不同的模型显示出应变强度而不是其分布模式的差异。需要评估和验证当前​​用于模拟OMI周围骨骼的机械环境的所有有限元建模方法。 （C）2015 Elsevier Ltd.保留所有权利。

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