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目的:结合Micro-CT技术建立3种固位型设计的单端粘接桥的三维有限元模型。方法:用Micro-CT扫描成人上颌第一前磨牙,将获得的CT影像通过Mimics 10.0软件进行拟合,初步形成模型。再将模型转入Geomagic 7.0软件进行精修细化,形成ANSYS 10.0软件可识别的实体三维模型,最终得到单端粘接桥的牙体预备体与修复体模型。结果:成功建立了以上颌第一前磨牙为基牙、3种不同固位型设计的单端粘接桥的三维有限元模型,划分网格数分别为553 959、468 134、516 748。结论:将Micro-CT扫描技术与有限元方法结合建立高精度的单端粘接桥的三维有限元模型,可应用于进一步的生物力学分析。
OBJECTIVE: To establish three-dimensional finite element models of three kinds of retentive single-end bonded bridges with Micro-CT technique. Methods: The maxillary first premolar was scanned with Micro-CT, and the obtained CT images were fitted by Mimics 10.0 software to preliminarily form the model. Then the model was transferred to Geomagic 7.0 software for refinement and refinement to form a solid three-dimensional model identifiable by ANSYS 10.0 software. Finally, the dental prosthesis and prosthesis model of single-ended bonded bridges were obtained. Results: The three-dimensional finite element model of the single-ended bonded bridge with the maxillary first premolar as the abutment and the three different retainer designs was successfully established. The number of divided grids was 553 959, 468 134 and 516 748, respectively. Conclusion: The combination of Micro-CT scanning and finite element method is used to establish a three-dimensional finite element model of high-precision single-ended bonded bridge, which can be applied to further biomechanical analysis.