上颌牙列生理性支抗控制矫治器三维有限元模型的建立及应力分析  

Establishment of Three-dimensional Finite Element Model and Stress Analysis for Physiological Anchorage Spee-wire System Appliance in Upper Arch

作　　者：刘广美 刘海霞[1] 吴晓亚[1] 王为[1] 

机构地区：[1]新疆医科大学第二附属医院口腔科,新疆乌鲁木齐830000

出　　处：《口腔医学研究》2017年第3期320-323,共4页Journal of Oral Science Research

摘　　要：目的:建立上颌牙列生理性支抗控制矫治器三维有限元模型并进行应力分析。方法:选取1名个别正常合志愿者,将CT扫描数据输入Mimicsl7.0软件,通过三维重建的方法获得牙齿及颌骨(含皮质骨和松质骨)的三维模型。以stl格式转入逆向工程软件Geomagic Studio,对模型进行精修和细化。矫治器三维模型是在NX软件中设计得到。弓丝定义为几何非线性,将得到的牙齿、颌骨、矫治器及弓丝模型以stp格式输入NX软件进行装配,以ANSYSl5.0软件进行网格划分,最终建立牙齿、皮质骨、松质骨、弓丝、托槽的三维有限元模型。结果:建立了包括牙齿、颌骨、生理性支抗矫治器、弓丝、的三维有限元的整体模型。模拟正畸临床中牙齿的受力情况及位移情况。结论:建立的生理性支抗控制矫治器有限元模型,真实、精确、几何相似性强。可以模拟临床牙齿受力情况和位移趋势,有利于临床对该项技术的理解和应用。Objective：To establish a three-dimensional finite element model for physiological anchorage Speewire System appliance and analyze the stress.Methods：A Volunteer of individual normal occlusion was selected.The data of the person by CT scanning was imported into the software of Mimics l7.0,to obtain three dimensional model of teeth and jaw bone（cortical bone and cancellous bone）by three dimensional reconstruction method.The three dimensional model was put into reversely engineering software Geomagic studio through the format of STL and refined.The appliance of three-dimensional model was obtained by the design of NX software.Arch wire was defined as geometrically nonlinear.Teeth,jaws,appliance and wire model were imported into the NX software by the format of stp to assemble and meshed with ANSYS l5.0software.Ultimately,a whole model of three dimensional finite element of the teeth,jaws,physiological anchorage Spee-wire System appliance and arch wire was built.Results：A whole model of three dimensional finite element of the teeth,jaws,physiological anchorage Speewire System appliance and arch wire was built.The situation of force and tooth movement in orthodontic clinic was simulated.Conclusion：The finite element model with physiological resistance controlling appliance was authentic,accurate and strong similarity of geometric,which could simulate distribution of stress and displacement trend in clinical and be conducive to the understanding application of the technology in clinic.

关 键 词：生理性支抗控制矫治器 有限元分析 建模 

分 类 号：R783.5[医药卫生—口腔医学]