摘要
目的 Mimics软件结合薄层CT技术建立下颌第一前磨牙桩核冠的三维有限元模型.方法应用Mimics软件直接读取通过CT扫描所获取的建模所需一维影像图像(共72张,层厚0.3 mm,无间隔)的边界数据;再利用Ansysworkbench的曲面造型和加减布尔运算建立桩核冠各个三维实体模块模型,并进行三维重组;最后在Ansys软件中建立三维有限元模型同时划分力学单元并进行力学分析.结果建立了包括全瓷冠、桩核、粘固剂、牙周膜、牙胶尖、牙槽骨的三维有限元模型.结论应用薄层CT结合Mimics软件建模的方法方便快捷,能较好地实现有限元模型的几何相似性、边界约束和载荷相似性、力学性能相似性要求.
Objective To establish a three-dimensional finite element model of the first mandibular premolar with thin-layer CT scanning and Mimics software.Methods The data of the one-dementional pictures(a total of 72 pictures,with 0.3mm layer and without space)accuired by thin-layer CT scanning were analyzed by Mimics software.Then Ansysworkbench surface modeling and Boolean operation were used to reconstruct the 3D finite element model of post crown.Meanwhile,the 3D finite element model was meshed and mechanically analyzed.Result The three-dimensional finite element model of a restored first mandible premolar was established,including all-ceramic crown,post core,cement,pericementum,gutta percha point,and alveolar bone.Conclusion The establishment of three-dimensional finite element models with tin-layer CT scanning and Mimics software is convenient and fast,and can meet the requirements for geometric similarity,boundary constraint and load similarity and mechanical property similarity.
出处
《昆明医学院学报》
2012年第3期18-21,共4页
Journal of Kunming Medical College
基金
云南省科技厅联合专项基金资助项目(2007CA011)
