Methods for material assignment of femoral neck finite element analysis and its valid confirmation
10.3969/j.issn.1673-8225.2009.52.012
- VernacularTitle:股骨颈有限元分析的赋材料属性方法探讨及有效性验证
- Author:
Guodong ZHANG
;
Weijing LIAO
;
Shengxiang TAO
;
Wenyu MAO
;
Jianqiao CHEN
;
Xiaohui ZHENG
;
Susheng NIU
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2009;13(52):10263-10268
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND:Based on previously theoretical derivation,it thought that assignment with 10 kinds of material attributes to three-dimensional model of bone can match the needs of finite element analysis,however,whether the results is consistent with actual needs to be validated by experimental results.OBJECTIVE:Twelve specimens of femoral superior segment were used for finite element analysis,which were verified with results of biomechanical testing,to explore a reasonable method for material assignment of bone.METHODS:All 12 specimens of femoral superior segment were treated with CT scan,three-dimensional reconstruction in Mimics 10.0 and volume meshing in Ansys.The finite element analysis group was divided into 2 kinds (compact bone and cancellated bone),10,50,100,200,400 kinds of material attributes groups based on the gray value.All models were assigned with material attributes and tested in Ansys for mechanics data of nodes on surface of femoral neck.In biomechanical testing group,12 specimens of femoral superior segment were treated with compressed testing to harvest mechanics data of measuring point same as that of finite element analysis group.RESULTS AND CONCLUSION:The one-way analysis of variance showed that the differences between the biomechanical testing group and finite element analysis group of 2 kinds of material attributes had no obvious significance (P=0.082).Compared to the 10,50,100,200,400 kinds of material attributes group,the difference had no significance (P > 0.39).However,the differences between the 2 kinds of material attributes and the 10,50,100,200,400 kinds of material attributes in the finite element analysis group were obviously difference (P< 0.05),which was no difference in the 10,50,100,200,400 kinds of material attributes (P>0.9).The results demonstrated that to assign 10 kinds of material attributes to three-dimensional model of bone can match the needs of finite element analysis.
