中国组织工程研究

中国组织工程研究 ›› 2010, Vol. 14 ›› Issue (30): 5511-5514.doi: 10.3969/j.issn.1673-8225.2010.30.001

• 数字化骨科 digital orthopedics •    下一篇

CroweⅣ型髋关节发育不良骨盆有限元模型的构建

刘桂奇1，周勇刚2   

  1. 1辽宁医学院骨外科学，辽宁省锦州市  121001；2解放军总医院骨四科，北京市 100853
  • 出版日期:2010-07-23 发布日期:2010-07-23
  • 通讯作者: 周勇刚，博士，主任医师，解放军总医院骨四科，北京市 100853 zhouyg@263.net
  • 作者简介:刘桂奇★，男，1980年生，山东省临沂市人，汉族，2010年辽宁医学院毕业，硕士，主治医师，主要从事骨关节的研究。 liuguiqi@126.com

Construction of a pelvic finite element model of Crowe Ⅳ developmental dislocation of the hip

Liu Gui-qi1, Zhou Yong-gang2   

  1. 1 Department of Orthopedic Surgery, Liaoning Medical University, Jinzhou  121001, Liaoning Province, China; 2 Fourth Department of Orthopedics, General Hospital of  Chinese PLA, Beijing  100853, China
  • Online:2010-07-23 Published:2010-07-23
  • Contact: Zhou Yong-gang, Doctor, Chief physician, Fourth Department of Orthopedics, General Hospital of PLA, Beijing 100853, China zhouyg@263.net
  • About author:Liu Gui-qi★, Master, Attending physician, Department of Orthopedic Surgery, Liaoning Medical University, Jinzhou 121001, Liaoning Province, China liuguiqi@126.com

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530

被引次数

15

摘要：

背景：骨骼生物力学数字有限元分析方法，因其有限元模型作为虚拟标本可重复使用而不被破坏，可以降低实验成本。
目的：探索一种利用三维有限元软件快速建立骨盆三维有限元模型的方法，并对发育性髋关节脱位患者假髋臼周围的受力情况进行初步分析。
方法：采用发育性髋关节脱位患者的骨盆CT数据，在Mimics 10.0软件中进行三维重建面网格划分，在Ansys10.0软件中进行体网格划分后导入Mimics10.0中赋予材料属性，从而建立发育性髋关节脱位患者的双髋臼半骨盆有限元模型。在Ansys10.0中，模拟患者患侧单下肢站立的情况对假臼关节面施加静力载荷，对该模型进行初步的力学分析及验证。
结果与结论：基于DICOM格式CT数据建立了发育性髋关节脱位患者的双髋臼半骨盆三维有限元模型，模型精确可用，包括147 167个节点，113 898个单元，假臼位置与骶髂关节的关节面相对。患侧单下肢站立的情况下，骨盆应力主要集中在假髋臼和骶髂关节面之间的骨质。利用Mimics及Ansys软件可简单有效地建立骨盆的有限元模型，此建模过程同样适用于人体其他骨骼有限元模型的建立。利用有限元模型可以方便有效的模拟人体骨骼生理及病理状态下的受力情况，对于临床提供参考和指导。

关键词: 发育性髋关节脱位, 三维重建, 有限元分析, Mimics, 数字化骨科

Abstract:

BACKGROUND: Skeletal biomechanics digital finite element analysis can reduce experimental cost with finite element model as virtual sample, which can be used repetitively. 
OBJECTIVE: To explore a method of building three-dimensional finite element model of pelvis with 3D finite element software, and analyze the stress around pseudo-acetabulum of developmental dislocation of hip (DDH) using the model.
METHODS: Using DDH patient’s pelvic CT data, pelvic 3D object was reconstructed in the software of Mimics 10.0, and the surface was meshed. In Ansys10.0, the body meshing was performed, and the files were imported to Mimics10.0, which gave the material properties. The pelvic finite element model of DDH was established. In Ansys10.0, single limb standing was simulated, and static load was applied on the pseudo-acetabulum articular surface. The preliminary analysis of the model was made.
RESULTS AND CONCLUSION: Based on DICOM format CT data, a semi-pelvic three-dimensional finite element model was established which included a true acetabulum and a pseudo-acetabulum. The model included 147 167 nodes and 113 898 elements. The pseudo-acetabular was close to sacroiliac joint. In single limb standing, pelvic stress concentrated in the bone between pseudo-acetabulum and the sacroiliac joints. Software of Mimics and Ansys provides a simple and effective method of 3D finite element modeling. This 3D finite element modeling method is also applicable to other bones. This finite elements method can effectively simulate the human bone stress under physiological and pathological conditions, and provide clinical reference and guidance.

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