中国组织工程研究

中国组织工程研究 ›› 2012, Vol. 16 ›› Issue (26): 4801-4806.doi: 10.3969/j.issn.1673-8225.2012.26.011

• 人工假体 artificial prosthesis • 上一篇    下一篇

踝关节内翻的有限元力学分析

郭国新1，赵长义2，曹 雷2，任国山2   

  1. 1石家庄市第三医院放射科，河北省石家庄市 050011；
    2河北医科大学解剖教研室，河北省石家庄市 050017
  • 收稿日期:2012-02-02 修回日期:2012-02-02 出版日期:2012-06-24 发布日期:2013-11-02
  • 通讯作者: 任国山，教授，硕士生导师，河北医科大学解剖教研室，河北省石家庄市 050017
  • 作者简介:郭国新★，女，1977年生，河北省任丘市人，汉族，2001年河北医科大学毕业，硕士，主治医师，主要从事影像诊断工作，以及人体微观解剖结构的数字化三维重建及分析。 flyingbirdinsky@163.com
  • 基金资助:

    河北省卫生厅青年科技课题(20100152)。课题名称：踝足数字模型的建立及下胫腓连接损伤的有限元分析

Finite element mechanical analysis of ankle joint inversion

Guo Guo-xin1, Zhao Chang-yi2, Cao Lei2, Ren Guo-shan2   

  1. 1Department of Radiology, Third Hospital of Shijiazhuang, Shijiazhuang 050011, Heibei Province, China;
    2Department of Anatomy, Hebei Medical University, Shijiazhuang 050017, Hebei Province, China
  • Received:2012-02-02 Revised:2012-02-02 Online:2012-06-24 Published:2013-11-02
  • Contact: Ren Guo-shan, Professor, Master’s supervisor, Department of Anatomy, Hebei Medical University, Shijiazhuang 050017, Hebei Province, China
  • About author:Guo Guo-xin★, Master, Attending physician, Department of Radiology, Third Hospital of Shijiazhuang, Shijiazhuang 050011, Heibei Province, China flyingbirdinsky@163.com

PDF

892

被引次数

12

摘要：

背景：近年来，骨科生物力学领域的研究不断成熟和发展，研究方法多采用有限元分析软件。作者检索文献发现国内外学者对于踝关节的研究也日益增多，但是所见研究均为静态状态，而且对于非中立位相踝关节损伤的研究鲜有报道。
目的：对已建立的踝关节数字模型进行有限元力学分析，观察踝关节在不同内翻角度时，其组成骨在不同空间维度上的位移、剪切力变化及应力变化规律，探讨内翻时踝关节的损伤机制。
方法：经Mimics、Geomagic和Ansys处理后，生成的踝关节三维数字模型导入软件Ansys中，经过约束条件、施加载荷、求解试算等阶段，对不同内翻角度时的踝关节各组成骨进行有限元分析。
结果与结论：实验模拟了踝关节内翻角度在10°，15°，20°，25°，30°，45°，60°，70°，80°，85°的10种不同工况，分别对踝关节进行有限元力学分析，得到其各组成骨在不同空间维度上发生的位移、剪切力和应力分布情况。分析数据，发现其所发生位移、所受应力及剪切力均随着内翻角度的增加不断增加，最大应力分布区即外踝、距骨滑车髁间线外侧部，为临床上最常见发生骨折的部位。随着内翻角度的增加，距骨x轴上发生的位移增加，从而影响整个踝关节的应力分布。

关键词: 踝关节内翻, 数字模型, 有限元分析, 生物力学, 数字化影像医学, 数字化骨科

Abstract:

BACKGROUND: In recent years, with the wide application of finite element analysis in the field of biomechanics, studies on the ankle joint from domestic and abroad scholars have been increased. However, the study is mainly on static states, searching the literature of the past few years, reports about ankle injury in non-mid-stance have seldom been found.
OBJECTIVE: To make finite element biomechanical analysis of the ankle three-dimensional digital model; to observe the changes of displacement distribution, shear stress and stress of every part of the ankle joint from different perspective; and to discuss the ankle injury mechanism under the condition of inversion.
METHODS: The three-dimensional digital model of ankle that processed in Mimics and Geomagic surfale was imported into Ansys, and then made a finite element analysis of the obtained model at different inversion angles after constraining conditions, loading pressure and solving.
RESULTS AND CONCLUSION: In this article ,10 different inversion angles of the ankle joint model were simulated successfully, that were 10°, 15°, 20°, 25°, 30°, 45°, 60°, 70°, 80° and 85°. At each inversion angle, we made finite element mechanical analysis, and obtained the distribution of displacement, shear stress, and stress of every part of the ankle joint from different spatial dimensional. After studying the datum, we draw a conclusion that the x (y, z)-displacement, xy (yz, xz)-shear stress, x (y, z)-stress were increased gradually with the increasing of the inversion angle, the maximum stress located on the lateral malleolus and the lateral part of trochlea tali, where was the most fragile part of the ankle joint to be broken. In addition, the x-displacement of talus was increased with the increasing of inversion angle, which influenced the distribution of stress on the whole ankle joint model.

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