华西口腔医学杂志

• 基础研究 • 上一篇    下一篇

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

王冬1, 2, 杨壮群1, 虎小毅1   

  1. 1.西安交通大学口腔医院口腔颌面整形外科, 陕西西安710002; 2.西安医学院口腔医学系, 陕西西安710021
  • 收稿日期:2007-08-25 修回日期:2007-08-25 出版日期:2007-08-20 发布日期:2007-08-20
  • 通讯作者: 杨壮群,Tel:029- 87256632
  • 作者简介:王冬(1979-),男,宁夏人,住院医师,硕士

Thr ee- dimensional finite element analysis of thr ee conjunctive methods of fr ee iliac bone gr aft for established mandibular body defects

WANG Dong1,2, YANG Zhuang- qun1, HU Xiao- yi1   

  1. 1. Dept. of Oral and Maxillofacial Surgery,Xi′an Jiaotong University, Xi′an 710002, China;2. Dept. of Stomatology, Xi′an Medical College, Xi′an 710021, China
  • Received:2007-08-25 Revised:2007-08-25 Online:2007-08-20 Published:2007-08-20
  • Contact: YANG Zhuang- qun,Tel:029- 87256632

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VonMises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。

关键词: 下颌骨缺损, 髂骨移植, 三维有限元

Abstract:

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.

Key words: mandibular defects, iliac bone graft, finite element analysis