三维有限元分析不同生物力作用的上颌第一前磨牙**★

摘要

背景：应用有限元分析法对微种植钉支抗的生物力学研究较少见，而有限元模型的准确性与否是决定了有限元分析结果的重要因素。目的：建立上颌第一前磨牙的三维有限元模型，并分析不同角度生物力作用于上颌第一前磨牙的移动特点。方法：利用牙科CT扫描上颌第一前磨牙获得数据，通过Mimics软件实现CT图像与三维模型的转换，根据DICOM数据建模法建立三维有限元模型，模拟在不同角度微种植钉支抗施力下进行生物力学实验，分析上颌第一前磨牙的位移情况。结果与结论：应用此方法获得上颌第一前磨牙的三维有限元模型的方法简便、精确，能最大程度的真实模拟生物力学实验，上颌第一前磨牙在微种植钉支抗作用下，产生远中倾斜移动、远中舌向旋转和压低运动的复合运动趋势。%　　BACKGROUND: The research on the micro-implant anchorage with finite element analysis method is rare, while accuracy or not of the finite element model is the main factor to determine the finite element analysis results. OBJECTIVE: To establish the three-dimensional finite element model of maxil ary first premolar and to analyze the moving characteristics of maxil ary first premolar under biological forces from different angles. METHODS: The data of the maxil ary first premolar was obtained by dental CT scanning, and the conversion between CT image and three-dimensional model could be achieved by Mimics software. The three-dimensional finite element model was established by using the DICOM data modeling method, in order to simulate the biomechanical experiment of loading forces on the micro-implant anchorage from different angles, and then the moving characteristics of maxil ary first premolar was analyzed. RESULTS AND CONCLUSION: The application of this method to obtain three-dimensional finite element model of maxil ary first premolar was simple and accurate, and could simulate the mechanics experiment in the greatest degree. Maxil ary first premolar produces compound motor trend of distal and inclined moving, distal and lingual rotating and down movement in action of micro-implant anchorage.