含不对称摇椅弓的上颌矫治系统三维非线性有限元模型的构建  

Construction of three-dimensional nonlinear finite element model of maxillary correction system with asymmetric rocking chair arch wire

作　　者：曾庆妍[1,2] 方志欣 周嫣[1] 唐倩[1] 刘代斌[3] ZENG Qing-yan;FANG Zhi-xin;ZHOU Yan(Department of Orthodontics, the People′s Hospital of Guangxi Zhuang Autonomous Region, Nanning 530021, China)

机构地区：[1]广西壮族自治区人民医院口腔正畸科,南宁520021 [2]桂林医学院附属口腔医院,广西541009 [3]长沙市口腔医院,湖南410000

出　　处：《中国临床新医学》2020年第11期1125-1128,共4页CHINESE JOURNAL OF NEW CLINICAL MEDICINE

基　　金：广西医药卫生项目(编号:桂卫Z2015356)。

摘　　要：目的构建包含不对称摇椅弓的上颌矫治系统三维非线性有限元模型,为探讨不对称摇椅弓作用于牙列的生物力学机理奠定基础。方法利用上颌骨及上牙列等CT扫描数据及托槽弓丝等实体数据,通过运行三维有限元分析等专用软件,建立包含上颌骨、牙列、托槽、不对称摇椅弓等在内的整体上颌三维非线性有限元模型。结果建立了含不对称摇椅弓的上颌三维非线性有限元模型,包含160514个单元和242878个节点。结论建立的有限元模型具有较高的仿真度和良好的几何相似性,为进一步探讨不对称摇椅弓矫治牙合平面偏斜时作用于牙列的力学机理提供了良好的研究手段。Objective To construct a three-dimensional(3D)nonlinear finite element model of maxillary correction system with asymmetric rocking chair arch wire,and to lay the foundation for further investigating the biomechanical mechanism of asymmetric rocking chair arch wire on the dentition.Methods Computed tomography(CT)scan data of maxilla and upper dentition,and the data of real items including bracket,arch wire and so on were used to construct a 3D nonlinear finite element model of the whole maxilla including the maxilla,dentition,brackets and asymmetric rocking chair arch wire through running special software such as 3D finite element analysis.Results The 3D nonlinear finite element model of maxillary correction system with asymmetric rocking chair arch wire was constructed.The model had a total of 160514 units and 242878 nodes.Conclusion The constructed finite element model has a high degree of simulation and good geometric similarity,which provides a good research method for further study of the mechanical mechanisms of asymmetric rocking chair arch wire acting on the dentition when the asymmetric rocking chair arch wire is used to correct the occlusal plane deflection.

关 键 词：正畸 生物力学 上牙列 不对称摇椅弓 三维有限元分析 

分 类 号：R783.5[医药卫生—口腔医学]