人股骨头软骨与半月板黏弹性分析

<title>scoelastic Analysis on Human Femoral Head Cartilage and Meniscus

为了了解真实人体病态与正常关节软骨组织在力学性能上的差异，做了黏弹性分析实验．对于正常组和病态组的半月板，应力松弛曲线G(t)-1nt的斜率Kt分别是-0．1 17 9和-0．085 6，G(t)的终点值Ge分别是0．525 0和0．571 0．对于正常组和病态组的股骨头软骨，Kr分别是-0．101 4和～0．063 3，Ge分别是0．591 5和0．663 2．对于正常组和病态组的半月板，蠕变曲线J(t)-1nt的斜率Kc分别是0．208 O和0.109 5，J(t)的终点值Je分别是1．953 8和1．493 1．对于正常组和病态组的股骨头软骨，Kc分别是0．167 3和0．120 7，Je分别是1．854 9和1．599 8．病态组标本的应力松弛和蠕变量明显比正常组低，主要原因是胶原纤维变性和蛋白多糖减少．

<abstract> order to study the differences in mechemics between normal and abnormal cartilage of human articulation, the authors do the viscoelastic analysis experiment. The stress relaxation and creep test were performed. For normal and abnormal meniscus, the slope of relaxation curve G (t) with In t ATr is -0.1179 and -0.0856, Ge (the value of G(t) at the end) is 0.5250 and 0.5710 respectively. For normal and abnormal cartilage of femoral head, the Kr is -0.101 4 and -0.063 3, Ge is 0.591 5 and 0.6632 respectively. For normal and abnormal meniscus, the Kc (the slope of creep curve J(t) with In t) is 0.208 0 and 0.109 5, Je (the value of J (t) at the end) is 1.953 8 and 1.493 1 respectively. For normal and abnormal cartilage of femoral head, the Kc is 0.167 3 and 0.120 7, Je is 1.854 9 and 1.599 8 respectively. The stress relaxation and creep quantity of abnormal specimens evidently move less than that of normal group. The main reason is collagen degeneration and decrease in proteoglycan.