The effect of displacement control input parameters on tibiofemoral prosthetic knee wear
The effect of displacement control input parameters on tibiofemoral prosthetic knee wear
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DOI：
10.1016/s0043-1648(01)00650-0
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发表时间：
2001-10-01
期刊：
影响因子：
5
通讯作者：
Gilbertson, LN
中科院分区：
文献类型：
--
作者：
Johnson, TS;Laurent, MP;Gilbertson, LN
全膝关节置换术胫股关节处UHMWPE磨损的机制可能高度依赖于运动的循环方向、滚动与滑动的相对量以及如前所述的髋关节部件接触表面的载荷[3]。在Boston AMTI膝关节模拟器上，使用Insall-Burstein（R）（1）II组配式膝关节系统（IB-II）膝关节假体的标准试验方案的正常行走步态模拟磨损率为17.0 mg/10（6）次循环。当前/后（A/P）平移输入减少50%时，磨损率降低约37%，至10.6 mg/10（6）次循环。消除前后平移或胫骨旋转后，磨损率分别降低至1.7 mg/10（6）次循环和0.69 mg/10（6）次循环。这些结果不能仅用滑动距离效应来解释，并表明UHMWPE磨损率对其他参数敏感，例如多向剪切运动的幅度和滚动/滑动接触运动学与施加载荷的比值。(C)2001爱思唯尔科技有限公司。保留所有权利。
The mechanisms of UHMWPE wear at the tibiofemoral articulation of a total knee replacement are potentially highly dependent on the cyclic direction of motion, the relative amounts of rolling versus sliding, and the loading of the contacting surfaces as previously described for hip components [3]. The simulated wear rate, for a standard test protocol utilizing the Insall-Burstein (R) (1) II Modular Knee System (IB-II) knee prosthesis, for normal walking gait was found to be 17.0 mg/10(6) cycles on a Boston AMTI knee simulator. When the anterior/posterior (A/P) translation input was reduced by 50%, the wear rate was reduced approximately 37% to 10.6 mg/10(6) cycles. Eliminating either the A/P translation or tibial rotation reduced the wear rate to 1.7 mg/10(6) cycles and 0.69 mg/10(6) cycles, respectively. These results cannot be explained by sliding distance effects alone and suggest that the UHMWPE wear rate is sensitive to other parameters, such as the magnitude of multidirectional shear motion and the ratio of rolling/sliding contact kinematics in combination with the applied load. (C) 2001 Elsevier Science B.V. All rights reserved.