中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (53): 8651-8655.doi: 10.3969/j.issn.2095-4344.2014.53.023

• 骨与关节生物力学 bone and joint biomechanics • 上一篇    下一篇

基于Composite Femur三维有限元股骨模型的建立及实验验证

王国栋1,姜海波2,潘  滔3   

  1. 1济宁医学院附属医院关节与运动医学科,山东省济宁市  272029
    2中国矿业大学机电工程学院,江苏省徐州市  221000
    3中山大学附属第六医院骨科,广东省广州市  510080
  • 修回日期:2014-11-28 出版日期:2014-12-24 发布日期:2014-12-24
  • 通讯作者: 潘滔,教授,博士生导师,中山大学附属第六医院骨科,广东省广州市 510080
  • 作者简介:王国栋,男,1982年生,山东省莱芜市人,汉族,2008年中山大学毕业,硕士,主治医师,主要从事骨与关节损伤研究。
  • 基金资助:

    山东省自然科学基金(ZR2010HQ036)

Establishment and verification of three-dimensional finite element model based on Composite Femur scans

Wang Guo-dong1, Jiang Hai-bo2, Pan Tao3   

  1. 1Department of Orthopaedics, Affiliated Hospital of Jining Medical College, Jining 272029, Shandong Province, China
    2School of Mechatronic Engineering, China University of Mining & Technology, Xuzhou 221000, Jiangsu Province, China
    3Department of Orthopedics, the Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
  • Revised:2014-11-28 Online:2014-12-24 Published:2014-12-24
  • Contact: Pan Tao, Professor, Doctoral supervisor, Department of Orthopedics, the Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
  • About author:Wang Guo-dong, Master, Attending physician, Department of Orthopaedics, Affiliated Hospital of Jining Medical College, Jining 272029, Shandong Province, China
  • Supported by:

    the Natural Science Foundation of Shandong Province, No. ZR2010HQ036

摘要:

背景:随着计算机技术的发展,三维有限元分析越来越多地应用于骨骼生物力学的研究,股骨作为人体最大最粗的长骨具有典型生理意义,其生物力学问题需要深入研究。
目的:建立长管状骨的有限元分析模型,并通过力学实验验证有关参数。
方法:通过CT扫描3rd generation composite femurs,获得连续断层图片,导入MIMICS医学建模软件生成实体模型后,应用通用有限元分析软件进行网格划分、材料属性赋值生成有限元模型,约束边界条件,模拟受力状态进行加载,得出有限元模型上的应力与应变结果,并与实测实验结果对比。
结果与结论:股骨有限元生成节点数为52 772,单元格为45 127,进行股骨干单向压缩实验仿真,有限元模型相对位移与验证实验和实验计算结果一致性良好。提示用MIMICS建立的股骨模型,在Ansys下进行有限元分析,得到的结果与生物力学基本吻合,说明建立的股骨模型是可靠的。


中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程


全文链接:

关键词: 植入物, 数字化骨科, 股骨, 有限元分析, CT扫描, 压缩实验, 生物力学, 山东省自然科学基金

Abstract:

BACKGROUND: As the computer technology develops, three-dimensional finite element analysis has been widely applied in the studies of skeletal biomechanics, femur is the longest and thickest bone in human bodies and has typical physiological significance, more research will focus on the biomechanics of the femur.
OBJECTIVE: To establish a three-dimensional finite element model of the long bone and verify the parameters through the biomechanical laboratory experiment.
METHODS: Based on successive images from CT scans, a three-dimensional solid model of the 3rd generation composite femur was established in Mimics. According to the relevant empirical formulas and material parameters of the universal finite element analysis software, three-dimensional finite element analysis models with different numbers of materials were set up. The boundary conditions were restricted and the simulation for linear elasticity of the compression was carried out. The stress and strain results were validated by in vitro verification test.
RESULTS AND CONCLUSION: Node number and cell-grid of the finite element model was 52 772 and 45 127, respectively. Under the end displacement, the average relative error between the simulation results and the experimental data for force-displacement was minor. Using the Mimics and Ansys softwares, the results were consistent with the biomechanical test, indicating the established femoral models were reliable.


中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程


全文链接:

Key words: femur, finite element analysis, CT scans, biomechanics, stress, physics

中图分类号: