华西口腔医学杂志

• 基础研究 • 上一篇    下一篇

下颌骨缺损腓骨重建的三维有限元应力分析

季彤1 铁英2 王冬梅2 张陈平1   

  1. 1.上海交通大学医学院附属第九人民医院口腔颌面外科, 上海200011;2.上海交通大学机械学院生物制造与生命质量工程研究所, 上海200240
  • 收稿日期:2009-04-25 修回日期:2009-04-25 出版日期:2009-04-20 发布日期:2009-04-20
  • 通讯作者: 张陈平,Tel:021-63138341-5157
  • 作者简介: 季彤(1969-),男,上海人,副教授,博士
  • 基金资助:

    上海市重点学科(优势学科)建设资助项目(Y0203);上海市科学技术委员会资助项目(08DZ2271100)

Three-dimensional finite element analysis of the mandible reconstruction with fibula

JI Tong1, TIE Ying2, WANG Dong-mei2, ZHANG Chen-ping1   

  1. 1. Dept. of Oral and Maxillofacial Surgery, The Ninth People′s Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China; 2. Institute of Biomedical Manufacturing and Life Quality Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2009-04-25 Revised:2009-04-25 Online:2009-04-20 Published:2009-04-20
  • Contact: ZHANG Chen-ping,Tel:021-63138341-5157

摘要:

目的建立下颌骨缺损腓骨重建有限元模型,对模型进行定量的三维有限元应力分析,为临床下颌骨修复重建提供理论依据和指导。方法通过螺旋CT扫描、CAD/CAM软件,建立下颌骨缺损腓骨重建有限元模型,模拟3种下颌骨缺损类型,对模型进行定量的三维有限元应力分析,了解下颌骨重建后应力分布特征。结果建立了3种与临床相似的下颌骨部分切除腓骨重建的三维有限元模型。各腓骨重建模型的应力分布与正常模型有明显差别,最大应力出现在腓骨和下颌骨交界处。腓骨重建模型各兴趣区Von Mises应力和最大主应力与正常下颌骨模型相比,除健侧(左侧)髁突区外多数兴趣区均有显著差异。结论应用CT扫描、计算机建模和有限元分析软件,可以建立模拟腓骨重建下颌骨缺损的三维有限元模型。下颌骨缺损腓骨重建后,下颌骨的应力出现显著改变,而这一改变在手术侧的髁突和髁颈表现最为明显。

关键词: 下颌骨, 腓骨重建, 三维有限元

Abstract:

Objective To construct a three-dimensional finite element model of reconstructed mandible and analyze the stress distributions of the model. Methods CT scan and CAD/CAM software was used to develop the three-dimensional finite element model of reconstructed mandible and stress analysis was performend with ANASYS 7.0 software. Results The three-dimensional finite element models of normal mandible and reconstructed mandible were constructed. The stress analysis discovered an unbalanced stress distribution in the mandible. Conclusion Reconstructing mandible with fibular flap not only damages its structure, but also induced the badness of its biomechanical environment, in which condyle was the most sensitive region during the stresses in the mandible were changed.

Key words: mandible, fibula reconstruction, three-dimensional finite element