Hoshino A, Wallace W A
Queen's Medical Centre, Nottingham, England.
J Bone Joint Surg Br. 1987 Nov;69(5):807-11. doi: 10.1302/0301-620X.69B5.3680348.
A biomechanical study has been carried out on 20 cadaveric knees to investigate their load-absorbing mechanism. The impact load was applied using a weight falling onto the transected proximal femur and the force transmitted through the knee was measured at the transected distal tibia using a load transducer. The peak force transmitted increased as, sequentially, meniscus, articular cartilage and subchondral bone were damaged or removed. The most striking result was found in an implanted knee replacement where the transmitted force reached 180% of that in the intact knee. The results show that the joint has an impact-absorbing property in each segment and that in the osteoarthritic knee there is less absorption of shock than in the normal knee. The high impact force in an implanted knee suggests that microfractures of the cancellous bone might be expected and may produce loosening.
已对20个尸体膝关节进行了生物力学研究，以探究其负荷吸收机制。通过让重物落在横断的股骨近端来施加冲击负荷，并使用负荷传感器在横断的胫骨远端测量通过膝关节传递的力。随着半月板、关节软骨和软骨下骨依次受损或被切除，传递的峰值力增加。在植入膝关节置换物的情况下发现了最显著的结果，其中传递的力达到了完整膝关节的180%。结果表明，关节的每个部分都具有冲击吸收特性，并且在骨关节炎膝关节中，与正常膝关节相比，冲击吸收较少。植入膝关节中的高冲击力表明可能会出现松质骨微骨折，并可能导致松动。
