人颞下颌关节CT三维重建及其有限元实体建模

目的：由活体直接获得人颞下颌关节（包括下颌骨、关节盘及关节结节）的三维影像，以建立其三维有限元模型。材料与方法：利用ＡｕｔｏＣＡＤ软件及螺旋ＣＴ扫描技术与三维有限元分析方法相结合，将ＣＴ扫描图像转换为可用于有限元实体建模的数字图像。结果：三维有限元实体模型与螺旋ＣＴ三维重建影像比较，几何相似性与还原性良好，材料构造合理，并由此建立了理想的人颞下颌关节三维有限元模型。结论：在临床实践中，借助于螺旋ＣＴ扫描及Ａｕｔｏ－ＣＡＤ软件在活体建立人颞下颌关节三维有限元模型是切实可行的，结果是满意的。

Reconstructing Three-dimensional Image and Modeling Three-dimensional Finite Element Solid of Human Temporomandibular Joint

Purpose: To obtain three-dimensional (3-D)image of human temporomandibular joint (TMJ) including the mandible, disc and articular tubercle directly from in vivo in order to develop its 3-D finite element model. Materials and Methods: Combining spiral CT scanning technology with 3-D finite element method, together with Auto-CAD software, the CT tomographic scanning image of TMJ was changed to the mumerical image used to finite element solid modeling. Results: Compared with 3-D image reconstructed by spiral CT, geomeric similarity and shape restoration of 3-D finite element solid model were good. Its material structure was reasonable, also. So, an indeal 3-D finite element model of human TMJ was constructed. WT5HZConclusion: The method to develop 3-D finite elemenAuthor t model of human TMJ in vivo by spiral CT scanning and Auto-CAD technology was feasible in clinical practice, and the results were satisfying.