中文摘要：

目的建立正常的颞下颌关节有限元模型和髁突骨折切复内固定手术模型，为颞下颌关节系统的生物力学研究提供数字平台。方法获取正常颞下颌关节CT和MRI扫描图像数据，使用Mimics、Geomagic、ANSYS等软件建立颞下颌关节三维有限元模型和髁突骨折外科手术模型并进行初步的生物力学分析，以验证模型的有效性。结果建立了颞下颌关节系统的三维有限元模型和髁突骨折外科模型具有良好的生物形态。结论根据CT、MRI影像和解剖参数，利用医学影像三维建模软件Mimics以及逆向工程软件Geomagic Stadio可以精确、可行地构建颞下颌关节系统的表面网格模型，并在有限元分析软件Ansys中构建颞下颌关节系统的三维有限元模型。该模型还原了TMJ的生物力学环境。

英文摘要：

Objective To establish a three-dimensional finite element model of normal temporomandibular joint system and surgical treatment on mandihular condylar fractures three-dimensional digital model in order to supply a digital plat form for biomechanical research of TMJ. Methods CT and MRI scanning data of normal TMJ were used to establish intact three-dimensional finite model of TMJ and surgical treatment on mandihular condylar fractures ,using Mimics, Geomagic and ANSYS software. Biomechanies of the TMJ model was analyzed to verify the validity of the model. Results An intact three- dimensional finite element model of TMJ and surgical treatment on mandibular condylar fractures was established successfully, and the model provides a precise anatomic morphology of the temporomandibular joint. Conclusion It is precise and feasible to construct a 3-D FEM of the TMJ system based on CT images, MRI images and anatomy by means of Mimics and Geomagic Stadio and Ansys.This model can restore the biomechanics environment of the TMJ, and provide new ideas of modeling for research on biomeehanies of the TMJ.