Joint load considerations in total knee replacement
Joint load considerations in total knee replacement
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DOI：
10.1302/0301-620x.79b1.6978
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发表时间：
1997-01-01
影响因子：
--
通讯作者：
Gachter, A
中科院分区：
文献类型：
--
作者：
Kuster, MS;Wood, GA;Gachter, A
对12名正常受试者的膝关节负荷进行了估计，这些估计是从水平行走和下坡行走期间获得的运动学和动力学测量结果中获得的。最大胫股压缩力达到平均负荷，水平行走为3.9倍体重（BW），下坡行走为8倍体重，在每种情况下，在早期站立阶段。在下坡行走时，肌肉力量贡献了80%的最大骨对骨的力，在水平行走时，肌肉力量贡献了70%的最大骨对骨的力，而地面反作用力分别仅贡献了20%和30%。大多数全膝关节设计提供的胫股接触面积为100至300 mm（2）。因此，在下坡行走过程中，每走一步都会超过这些聚乙烯嵌体的屈服点，未来全膝关节设计的评价应基于膝关节屈曲20度时3.5倍BW、40度时8倍BW和60度时6倍BW的胫股关节载荷。
Estimates of knee joint loadings were calculated for 12 normal subjects from kinematic and kinetic measures obtained during both level and downhill walking, The maximum tibiofemoral compressive force reached an average load of 3.9 times body-weight (BW) for level walking and 8 times BW for downhill walking, in each instance during the early stance phase. Muscle forces contributed 80% of the maximum bone-on-bone force during downhill walking and 70% during level walking whereas the ground reaction forces contributed only 20% and 30% respectively.Most total knee designs pro,ide a tibiofemoral contact area of 100 to 300 mm(2). The yield point of these polyethylene inlays will therefore be exceeded with each step during downhill walking, Future evaluation of total knee designs should be based on a tibiofemoral joint load of 3.5 times BW at 20 degrees knee flexion, 8 times BW at 40 degrees and 6 times BW at 60 degrees.