控轴矫治系统下颌尖牙及牙周组织三维有限元模型的建立  

Construction of a three-dimensional fi nite eiement modle of mandibular canine with cannine adjustable-axis bracket

作　　者：姜宁[1] 潘杰 赵君[1] 陈骊 

机构地区：[1]上海交通大学医学院附属第九人民医院口腔颅颌面科正颌正畸中心/口腔正畸科,上海200011 [2]上海市口腔病防治院.上海市口腔医院正畸科,上海200001

出　　处：《口腔材料器械杂志》2018年第1期25-28,共4页Chinese Journal of Dental Materials and Devices

基　　金：上海申康医院发展中心2013年市级医院适宜技术联合开发推广应用项目(SHDC12014226);2015年市卫计委课题(GWIV-12)

摘　　要：目的建立带尖牙控轴托槽的下颌尖牙及其支持组织的三维有限元模型,初步进行有限元力学分析。方法 CBCT扫描获取下颌尖牙的断层图像,通过Mimics 14.0软件生成尖牙实体模型,并使用Pro/ENGINEER 4.0建模软件建立尖牙控轴托槽的实体模型,最后利用Ansya l4.5有限元分析软件建立有限元模型并进行分析。结果建立了带控轴托槽的下颌尖牙及其支持组织的有限元模型,模型由5种材料属性、6个实体组成,具有良好的几何相似性和力学相似性,符合有限元计算要求,并初步分析了远中牵引尖牙的有限元力学情况。结论本研究所建立的模型与临床情况接近,能够满足生物力学分析的要求,为进一步力学研究奠定理论基础。Objective The present study aimed to construct three-dimensional finite element model of mandibular canine with adjustable-axis bracket. Methods The tomographic image of mandibular canine was obtained by CBCT scanning. By using the Pro/ENGINEER 4.0, Mimics 14.0, Ansya 14.5 softwares, the three- dimensional finite element model of mandibular canine with adjustable-axis bracket was constructed. Results The three-dimensional finite element model of mandibular canine with adjustable-axis bracket was established successfully, which had 80905 elements and 148550 nodes in total. Conclusion The three-dimensional finite element model of mandibular canine with adjustable-axis bracket can effectively guide the bracket modification and clinical application.

关 键 词：正畸尖牙 托槽 有限元 牙周组织 

分 类 号：R783.5[医药卫生—口腔医学]