舌侧矫治技术内收上前牙三维有限元模型的构建

Construction of 3D finite element model using thecustomized lingual bracket system during retracting maxillary anterior teeth

目的:构建舌侧矫治技术内收上前牙的整体三维有限元模型,为舌侧矫治技术的生物力学分析奠定基础。方法:对志愿者颌面部进行CBCT扫描,分别运用软件Mimics 14.11,Pro/Engineer 5.0,Geomagic Studio 12,Solidworks 2013及Ansys Workbench 13.0建立有限元模型。结果:建成包括e-Brace托槽、牙齿、牙周膜、牙槽骨、弓丝、微种植体、颊侧透明扣的三维有限元模型包含40个实体,与个性化舌侧矫治器实际情况相近,网格划分后,共有9062170个节点,506498个单元。结论:所建模型具有良好的几何相似性和力学相似性,较真实地模拟了临床实际情况,为进一步探讨个性化舌侧矫治过程中的牙齿移动生物力学机制提供良好基础。

Objective：To construct a three-dimensional finite element model（3D FEM） of a maxillary anterior teeth retraction force system in customized lingual bracket technique for biomechanic analysis.Method：After scaning volunteer’s maxillofacial region with CBCT,a 3D FEM was constructed using Mimics 14.11,Pro/Engineer 5.0,Geomagic Studio 12,Solidworks 2013 and Ansys Workbench 13.0.Results：The constructed 3D FEM contained 40 volume models,with e-Brace lingual brackets,detition,PDL,alveolar bone,arch wire,micro-implants and buccal buckles,and the model is feasible to resembling the clinical situation.The total number of the nodes was 9062170,and the number of the elements was 506498.Conclusion：The FEM has fine morphologi-cal and mechanical comparability,and has a good similarity to the clinic.Further biomechanic research for cus-tomized lingual orthodontics can be based on this 3D FEM.