Comparison Between the Kinematics of Fixed and Rotating Bearing Knee Prostheses
Comparison Between the Kinematics of Fixed and Rotating Bearing Knee Prostheses
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DOI：
10.1097/00003086-200011000-00020
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发表时间：
2000-11
影响因子：
4.2
通讯作者：
D. D’Lima;Michael Trice;A. Urquhart;C. Colwell
中科院分区：
文献类型：
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作者：
D. D’Lima;Michael Trice;A. Urquhart;C. Colwell
旋转平台移动的关节面膝关节植入物可增加胫股关节贴合性，而不会限制轴向旋转。在本研究中，研究了旋转平台膝关节置换术联合和不联合后交叉韧带置换术对膝关节运动学的影响。5个膝关节依次植入标准（固定）关节面，然后植入旋转平台假体，每种假体均采用后交叉韧带保留和替代设计。所有膝关节的三维运动学在牛津膝关节试验台上进行测量，该试验台模拟了负荷下动态四头肌驱动的闭合动力链膝关节伸展。与固定关节面相比，旋转关节面没有显著改变膝关节运动学。在该体外模型中，与交叉韧带替代设计相比，交叉韧带保留设计保持更靠前，并且具有更大的股骨净后滚和胫股外翻屈曲角度。
Rotating platform mobile bearing knee implants allow for increased tibiofemoral articular conformity without restricting axial rotation. In the current study, the effect of rotating platform knee replacement with and without posterior cruciate ligament substitution on knee kinematics was investigated. Five knees were implanted sequentially implanted with standard (fixed) bearings and then with rotating platform prostheses, each in posterior cruciate retaining and substituting designs. Three-dimensional kinematics for all knees were measured in an Oxford Knee Rig, which simulates dynamic quadriceps-driven closed kinetic chain knee extension under load. Rotating bearings did not significantly change knee kinematics when compared with fixed bearings. In this in vitro model, the cruciate retaining designs stayed more anterior, and had greater net femoral roll back and tibiofemoral valgus angulation with flexion than cruciate substituting designs.