人股骨生物力学特性的三维有限元分析

目的　了解股骨头颈部的力学分布以对临床股骨颈骨折治疗进行指导。方法　应用大型有限元分析软件ABAQUS建立人体股骨的三维有限元仿真模型 ,对该模型进行各种分析。结果　载荷的传导主要通过压力骨小梁和股骨距由股骨颈区传至股骨干的中下 1 /3处 ;当外界暴力作用时 ,应力主要集中在股骨上段 ,即股骨颈中下段和大小转子处及其之间。结论　股骨颈处的压力骨小梁和股骨距是重要的承载结构 ,内固定物的放置应循压力骨小梁方向尽量紧贴股骨距钻入 ;外展肌力的收缩对髋关节有一定的保护作用。

The three-dimensional finite element analysis of the human femur

Objective To find out the distribution of the strain and stress on the femoral so as to direct the treatment of femoral neck fracture. Methods By using the software ABAQUS,a three dimensional finite element model of the human femur was constructed.Then the model was tested under different loads.Results Loads were conducted to the middle and lower part of the femoral shaft through compressive trabeculae and femoral calcar.When external violence was put on it,the main stress distribution was on the upper femur,which was in the middle and lower part of the femoral neck and between greater trochanter and lesser trochanter.Conclusion ①The compressive trabeculae and femoral calcar in the femoral neck region are the main load bearing construction;②The internal fixator should be placed along the compressive trabeculae and as possible as to near the calar;③The contract of the abductor muscle can protect the hip joint.