复合材料股骨头假体三维有限元分析  

THREE-DIMENSIONAL FINITE-ELEMENT ANALYSIS OF COMPOSITE FEMORAL PROSTHESIS

作　　者：俞能宝[1] 董天华[2] 孙俊英[2] 

机构地区：[1]青岛海慈医院骨科,266033 [2]苏州大学第一附属医院骨科,215006

出　　处：《医用生物力学》2001年第3期155-159,共5页Journal of Medical Biomechanics

摘　　要：目的：分析不同材料股骨头假体置换后的应力关系。方法　应用三维有限元理论分析碳纤维聚砜（ＣＲＦ/ＰＳＦ）复合材料与钴铬钼(ＣｏＣｒＭｏ)合金假体置换，在施加载荷，动静态下的应力分布。结果：ＣＲＦ/ＰＳＦ组股骨受力达８５％～９８％，而ＣｏＣｒＭｏ只有５０％；在假体的表面受力前者只有１０％左右，后者则达５０％，。结论 低弹ＣＲＦ/ＰＳＦ复合材料假体能显著降低应力遮挡、应力集中，从而推断低弹材料具有高疲劳强度，能达到较好的力学相容性。Purpose To analyze the stress distribution of prosthesis with different materials after replacement. Method Three-dimensional finite-element analysis was used to analyze the stress distributon when the prosthesis were loaded in the static and walking state after the replacement of composite material prosthesis and CoCrMo alloy prosthesis respectively. Result When loaded CRF/PSF Group received 85%～98% of the stress while CoCrMo Group only received 50% the surface stress of the prosthesis was only 10% for the CRF/PSF Group and 50% for the latter. Conclusion Low elastic CRF/PSF composite prosthesis can significantly reduce stress shielding and concentration have high anti-fatigue strength and reach better mechanical compatibility.

关 键 词：复合材料 股骨头假体 三维有限元 碳纤维聚砜 钴铬钼合金 

分 类 号：R683.42[医药卫生—骨科学] R318.01[医药卫生—外科学]