骨性关节炎对膝关节软骨力学性质影响的实验研究

目的 研究正常国人新鲜尸体膝关节软骨和骨性关节炎膝关节软骨的生物力学性质,为临床提供生物力学参数。方法 取正常和病变的膝关节软骨在ShimadzuAUTOGRAPH电子万能试验机上进行一维拉伸实验。结果 得出了关节软骨最大载荷、伸长比、应力、应变等数据;用最小二乘法处理应力鄄应变数据,得出了其应力鄄应变关系表达式,拟合出了应力鄄应变曲线。结论 病变组各项力学性质指标均明显低于正常组。

Effect of Osteoarthritis on Mechanical Properties of Knee Joint Cartilage

Objective Study on the mechanical properties of the normal and osteoarthritis knee joint cartilage of ordinary person. Methods Make the tensile test of one dimension on the normal and the morbid knee joint cartilage with Shimadzu AUTOGRAPH electronic universal testing machine. Results Got the data of the maximum load, the tensile ratio, the stress, the strain and the elastic modulu. To deal with the data of stress and strain by least-squares fit, the stress-strain formula and the curves were got. Conclusion The experimental results show that all the mechanical property indexes of the morbid group are obviously lower than those of the normal group.