建立下颌第一二磨牙缺失三基牙双端固定桥修复三维有限元模型

The construction of the three-dimensional finite element model of three abutments of the rigid fixed bridge in deletion of first molar and second molar in mandibular

目的:建立下颌第一磨牙和第二磨牙缺失三基牙双端固定桥的三维有限元模型,为其力学分析提供数字模型。方法:采用螺旋CT扫描获得断层图像,用Mimics软件进行三维重建,导入Ansys软件中建立下颌第一磨牙和第二磨牙缺失三基牙双端固定桥的三维有限元模型。结果:建立的有限元模型包括牙齿、修复体、牙周膜和牙槽骨,共4260835个单元和739986个节点。结论:该模型有较好的力学和几何学相似性,可用来进行固定桥修复的生物力学研究。

Objective: To construct a three-dimensional(3-D) finite element model of three abutments of the rigid fixed bridge in deletion of first molar and second molar in mandibular and provide a digital model for analysing the biomechanical properties of the rigid fixed bridge.Methods: Based on the images scanned by CT technique,the 3-D model was reconstructed by a software named Mimics,and the 3-D finite element model including teeth,restorations,odontoperiosteum and alveolar bone was constructed in the Ansys program.Results: A ideal 3-D finite element model of the fixed bridge was constructed,including 4260835 elements and 739986 nodes.Conclusions: The finite element model was feasible and effective.The data could be applied in the stress analysis of the fixed bridge.