摘要
目的 报告三种人工髋关节生物力学测试结果。方法 设计了直柄加栓固定式人工髋关节 ,其特点是假体柄为直柄。直柄的头端外侧有一直径约 5mm的贯通性螺孔 ,与相应的螺栓相匹配。并对其进行了生物力学测试 ,方法是将 15根新股骨标本在股骨距上 12mm处截骨后随机分为安装弯柄髋关节 ,直柄髋关节和直柄加栓髋关节和正常对照共 4组 ,实验组每组 5具标本 ,对照组为截骨前 15具标本 ,模拟单足站立位 ,进行 15 0N、 30 0N和 45 0N加载 ,对相应部位的电应变进行测量 ,结果 1、各组应变值与载荷的大小量呈正线性相关。 2、在各测点中股骨距、股骨外侧和大转子处应变值变化最为明显。 3、在三个实验组中弯柄组应变值变化最大 ,直柄加栓组与对照组应变值较为接近。结论 直柄加栓人工髋关节符合生物力学要求。
Objective The authors report the effect of biomechanic experiment of three kinds of the femoral prosthesis Methods A kind of femoral prosthesie was designed,which is staight stem fixed with screw on the stem head The biomechamic test of this prosthesis and another two kind of femoral prosthesis Fifteen fresh femoral speicimens were as control before head osteotomy of femur above 12 mm lesser tyochanter After osteotomy,the all specimens were divided into three test groups consisting of five specimen in which the zigzag stem and the straight stem and the straight stem with screm were install respeclively,150N,300N and 450N were applied in one leg in the standing position for the measurement of electric syrein distribution in the femurs Results The result showed that the strain of all groups is positive line correlation with load The change of strain was more obviously in the great trochanter,latcral contex of femur and upper lesser trochanter Among three test groups,the strain of the zigzag stem specimen chang most obviously the stain of the sraight stem fixed screm approximate to control group Conclusion The authors consider that the self—designed femoral prosthesis reconsile the biomachnic demands
出处
《骨与关节损伤杂志》
2000年第1期42-44,共3页
The Journal of Bone and Joint Injury
关键词
人工髋关节
生物力学
Biomechanics
The femoral prosthesis
Strain
