股骨有限元分析赋材料属性的方法  

Methods for material assignment of finite element analysis with femurs

作　　者：张国栋[1] 廖维靖[1] 陶圣祥[2] 毛文玉[3] 陈建桥[3] 郑晓晖 张发惠[5] 

机构地区：[1]武汉大学中南医院康复医学科,湖北省武汉市430071 [2]武汉大学中南医院骨科,湖北省武汉市430071 [3]华中科技大学力学系,湖北省武汉市430071 [4]武装警察部队福建总队医院骨科,福建省福州市350025 [5]解放军南京军区福州总医院骨科研究所,福建省福州市350025

出　　处：《中国组织工程研究与临床康复》2009年第43期8436-8441,共6页Journal of Clinical Rehabilitative Tissue Engineering Research

摘　　要：将12侧股骨上段标本进行高速CT薄层扫描,在Mimics10.0中进行三维重建,在Ansys中进行体网格划分。对照组在Mimics10.0中根据灰度值将三维模型材料属性分为2种(密质骨及松质骨);试验组材料属性等分为10,20,50,100,200,400种后赋予材料属性,在Ansys中进行力学分析并采集三维模型全部单元力学测量数值;对分析数据进行统计学处理。结果显示,12侧股骨上段标本均成功进行有限元分析。标本1,5,6,7,9,10的对照组与各试验组差异均有显著性意义(P<0.05),标本2,3,4,8,11,12的对照组与试验组差异均无显著性意义(P>0.05)。各试验组之间差异均无显著性意义(P>0.89)。结果提示,传统方法将骨骼分成密质骨及松质骨2种材料属性,不能满足个性化骨骼有限元分析的要求,将骨骼赋予10种材料属性即可达到有限元分析的要求。All twelve specimens of femoral superior segment were treated with CT scanning, three-dimensional reconstruction in Mimics 10.0 and volume meshing in Ansys. The three-dimensional model of control group was divided into compact bone and cancellated bone based on the gray value, while the experimental group was divided into the following kinds of 10, 20, 50, 100, 200, 400. All models were assigned with material attributes to be tested in Ansys. All data of total elements were harvested and treated with U-test. All 12 specimens of femoral superior segment were successfully executed with finite element analysis; there were significant differences between No.1, 5, 6,7, 9 and 10 specimens of the control and experimental groups （P 〈 0.05）, but no differences were found between No. 2, 3, 4, 8, 11 and 12 of two groups （P 〉 0.05）. In addition, no statistical significance was found among the experimental groups （P 〉 0.89）. Results show that to assign skeleton to 2 kinds, Le. compact bone and cancellated bone, could not match the needs for a personalized finite element analysis; and to assign skeleton to 10 kinds of material attributes to three-dimensional model of femur could match the needs for finite element analysis.

关 键 词：股骨 三维重建 有限元 材料属性 

分 类 号：R318[医药卫生—生物医学工程]