基于CT标准格式文件建立上颌第一磨牙有限元模型

目的建立精确的上颌第一磨牙三维实体有限元模型,分析牙体各部位的应力分布。方法利用正常成人上颌第一磨牙螺旋CT的DICOM格式数据,通过特定的程序计算建立牙齿三维有限元实体模型;在该模型上模拟牙咬(?)情况分别进行垂直、侧向和垂直侧向混合加载,计算出牙体各部位的应力和位移。结果上颌第一磨牙在侧向和混合受力时,应力最大值出现在加载处和与侧向力同向的牙体颈部,大小相当,混合受力时(?)边缘部分应力消失;垂直受力时,应力最大值出现在加载处。结论本研究的建模方法几何形状较准确,并且能简捷有效的应用有限元方法进行牙齿各部位的应力分析。

Establishing a FEM of the maxillary first molar for restoration stress analysis

Objective A 3-D solid model of a human maxillary first molar was constructed and exported into a 3D-finite element model with analysis of the stress distribution of the tooth. Methods Using the CT scanning of a normal adult, with the help of the computer program and software, a 3D finite element model was established. Three different loading conditions were simulated: vertical, lateral occlusal loading and both of them. Result Stress concentration were found on the surface where the load was applied, and at the lingual cervical part of the crown when the stresses arising from sideways and combination. Conclusion The method of this study can construct a relatively accurate model of the tooth, and provides a reasonably simple and effective model for biomechanical analysis of the molar applications.