半月板在膝关节中的振荡吸收作用

THE ROLE PLAYED BY MENISCI AS SHOCK ABSORBERS IN THE KNEE JOINT

膝关节半月板的振荡吸收能力在退行性骨关节炎的发展中起了很大作用，为了评估它的振荡吸收能力，各种周期性负载下用微晶体压力传感器测量胫股关节的动态接触压，半月板切除后，在胫骨平台上的接触压随时间而迅速增高，较在切除半月板前压力作用下的同一区域，其达到饱和点的时间显著减少并达到相当高的数值，这指出没有半月板，股骨髁及胫骨平台之间将发生强烈和快速的直接接触，半月板具有振荡吸收和传递负载作用。

The shock absorptive capacity of the menisci of the knee joint may be of importance for the development of degenerative osteoarthrosis. To evaluate the shock absorptive capacity of them, dynamic contact pressure of the tibiofemoral joint was measured under various cyclic loading using micro-transistor pressure transducers.Following meniscectomy, the contact pressures acting on the tibial plateau, rising quickly with time, took significantly shorter time to reach the point of saturation and showed remarkably higher values than the pressures acting on the same area before meniscectomy. It means that without the menisci, strong and rapid direct contact between the femur condyle and the tibial plateau occurs, and that the menisci have shock absorptive and load transmitting function.