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首页> 外文期刊>The Journal of Strain Analysis for Engineering Design >Simulation of a three-dimensional craniofacial structure under the application of orthodontic loads
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Simulation of a three-dimensional craniofacial structure under the application of orthodontic loads

机译：正畸载荷作用下三维颅面结构的仿真

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摘要

The aim of this study was to develop a three-dimensional model of a patient's craniofacial structure to be analysed using the finite element method in order to estimate the forces required to carry out a dental positioning's correction. The three-dimensional model was composed by several anatomical structures, namely the teeth, the periodontal ligaments, and the trabecular and cortical bones, which were modelled with the aid of computed tomography cone beam images. The tomographic images were analysed and reconstructed using the 3D Slicer software, while the assembly of the anatomical structures modelled, as well as the contact surfaces between contiguous parts, was defined in computer-aided design software. Bone remodelling and the occurrence of tissue's injuries were considered during the numerical simulations carried out. By imposing displacements to each tooth, it was possible to calculate the orthodontic loads needed to carry out dental correction (reaction forces), as well as the distributions of stresses and deformations inherent to the clinical treatment, allowing to obtain a craniofacial structure capable of simulating the dental movements of upper and lower arches with anatomical realism. In addition, this methodology constitutes a personalised dental medicine that could lead to the development of highly customised orthodontic appliances where different mechanical loads could be applied individually to each tooth to achieve the foreseen dental correction.
机译：这项研究的目的是建立一个使用有限元方法进行分析的患者颅面结构的三维模型，以便估计进行牙齿定位矫正所需的力。三维模型由几个解剖结构组成，即牙齿，牙周膜韧带，小梁和皮质骨，并借助计算机断层扫描锥形束图像对其进行建模。使用3D Slicer软件分析和重建断层图像，同时在计算机辅助设计软件中定义建模的解剖结构以及相邻零件之间的接触面。在进行数值模拟的过程中考虑了骨骼重塑和组织损伤的发生。通过对每颗牙齿施加位移，可以计算出进行牙齿矫正所需的正畸载荷（反作用力）以及临床治疗固有的应力和变形分布，从而获得能够模拟的颅面结构具有解剖现实性的上下弓的牙齿运动。另外，这种方法学构成了个性化的牙科药物，可以导致高度定制的正畸矫治器的发展，其中可以将不同的机械负荷分别施加到每颗牙齿上，以实现可预见的牙齿矫正。

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