O'Connor John, Imran Ahmed
University of Oxford, Oxford, England.
Orthopedics. 2007 May;30(5 Suppl):42-5.
Movements of the meniscal bearing on the tibial plateau after Oxford knee arthroplasty (Biomet Orthopedics, Inc, Warsaw, Ind) reflect tibiofemoral movement. They have been shown to be load dependent. This article describes the use of a mathematical model of the knee in the sagittal plane to show that movement differences under load are caused by differences in ligament strains induced by different combinations of external loads and muscle forces. During passive flexion, roll-back of the femur on the tibia is required to minimize the forces transmitted by the ligaments.
牛津膝关节置换术（美国印第安纳州华沙市的Biomet骨科公司）后半月板假体在胫骨平台上的运动反映了胫股关节的运动。这些运动已被证明与负荷有关。本文描述了在矢状面使用膝关节数学模型来表明负荷下的运动差异是由外部负荷和肌肉力量的不同组合组合引起的韧带应变差异引起的。在被动屈曲过程中，股骨在胫骨上的后滚是必要的，以尽量减少韧带传递的力。
