三种载荷条件下种植体骨界面应力分布特征  

Characteristics of Stress Distribution on Bone Adjacent to Implants Under Three Different Loading Directions

作　　者：赖红昌[1] 张志勇[1] 张保卫[2] 张建中[2] 张富强[2] 薛淼[2] 

机构地区：[1]上海第二医科大学附属第九人民医院口腔医学院口腔颅颌面种植中心 [2]上海第二医科大学附属第九人民医院口腔修复科,上海200011

出　　处：《上海口腔医学》2002年第3期253-255,共3页Shanghai Journal of Stomatology

摘　　要：目的探讨种植体在垂直、斜向、水平方向3种加载条件下种植体周围骨界面应力的分布。方法应用牙CT扫描图像建立三维有限元种植体模型,在种植体模型上进行垂直方向加载35N,水平方向加载10N,斜向加载70N,计算种植体周围骨界面最大主应力及综合应力。结果3种加载条件下应力集中部位均出现在种植体颈部,水平加载及斜向加载比垂直向加载更容易产生颈部的应力集中。结论在临床设计种植方案时特别要注意容易产生斜向及水平咀嚼压力的种植部位的设计,不仅要考虑咀嚼压力的大小,还要考虑咀嚼压力的方向。Objective o evaluate the stress distribution on bone adjacent to an implant under the vertical load,oblique load and horizontal load.Methods Obtained three dimensional radiographic data of the jaw by dental CT scan.Based on the scanning sections,the three-dimensional finite element analysis mandible model was established.Loading vertical,oblique and horizontal forces on the implant,caculated the maximum stress,minimum stress and von mises stress.Results The peak stress occurred at the cervical bone margin adjacent to the implants;the stress concentration under the vertical loading is easily concentrated than that of vertical loading.Conclusion In the clinical designation,not only the force of bite but also the direction of the force should both be emphasised.

关 键 词：种植体 应力 有限元分析 义齿 

分 类 号：R783.3[医药卫生—口腔医学]