二维有限元法分析THA术前试模的重要性

THA dimensional finite element analysis of the importance of preoperative test mode

目的:通过全髋关节置换术(THA)术前试模与否与术后有限元模型的建立及力学分析,探讨术前试模的重要性。方法:选取行单侧THA的24例患者作为研究对象,将其分为两组(试模组和对照组),行THA,术后对患髋摄X线正位片,其原始数据输入有限元软件建立二维有限元模型,并进行力学分析、绘制应力曲线,与正常股骨近端的应力曲线进行比较。结果:试模组的股骨近端生物力学分析优于对照组,其应力曲线图较对照组更接近正常。结论:THA术前精确的试模能够使术后的股骨近端应力分布更接近正常。

Objective：Through artificial total hip arthroplasty（THA） or preoperative and postoperative tested mode model and finite element mechanical analyzed of the importance of preoperative test mode.Methods：24 patients underwent unilateral THA patients as research subjects would be divided into two groups（test module and the control group）,the line THA,taken after suffering from hip anteroposterior X ray film,the original data entry of a limited element software to create two-dimensional finite element model,and the mechanical analyzed,draw stress curve,and the normal stress curve of the proximal femur were compared.Results：The test module biomechanical analyzed of the proximal femur than the control group,the stress curve was closer to normal than the control group.Conclusion：THA accurate preoperative test mode enables the proximal femur after stress distribution close to normal.