下颌骨体部缺损游离髂骨块移植不同连接方式的应力分析  

Three-dimensional finite element analysis of three conjunctive methods of free iliac bone graft for established mandibular body defects

作　　者：王冬[1,2] 杨壮群[1] 虎小毅[1] 

机构地区：[1]西安交通大学口腔医院口腔颌面整形外科 [2]西安医学院口腔医学系,陕西西安710021

出　　处：《华西口腔医学杂志》2007年第4期345-348,共4页West China Journal of Stomatology

摘　　要：目的建立下颌骨体部缺损游离髂骨块移植的3种连接方式(端端式、外嵌式、内嵌式)的三维有限元模型,分析移植部位髂骨块、内固定系统及下颌骨相应部位的应力和位移分布情况。方法实验采用螺旋CT薄层扫描,利用图形图像处理软件及Ansys8.1软件建立正常下颌骨、部分髂骨、内固定系统和下颌骨体部缺损游离髂骨块移植3种连接方式的三维有限元模型,定量对比、分析上述研究部位不同的应力和位移分布情况。结果外嵌式连接模型中髂骨块、钛板钛钉的最大位移值最小,钛板钛钉、髂骨块钉孔周围和下颌骨残端钉孔周围的最大Von Mises较小。结论在本实验条件下,外嵌式连接是研究部位应力值最小且接近正常愈合状态的连接方式。Objective To analyze the stress and displacement distribution of 3D-FE models in three conjunctive methods of vascularized iliac bone graft for established mandibular body defects. Methods Using computer image process technique, a series of spiral CT images were put into Ansys preprocess programe to establish three 3D-FE models of different conjunctions. Results The three 3D-FE models of established mandibular body defects by vascularized iliac bone graft were built up. The distribution of Von Mises stress and displacement around mandibular segment, grafted ilium, plates and screws was obtained. Conclusion It may be determined successfully that the optimal conjunctive shape be the on-lay conjunction.

关 键 词：下颌骨缺损 髂骨移植 三维有限元 

分 类 号：R782[医药卫生—口腔医学] R318.01[医药卫生—临床医学]