Influence of simulator kinematics on the wear of metal-on-metal hip prostheses
Influence of simulator kinematics on the wear of metal-on-metal hip prostheses
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DOI：
10.1243/0954411011533481
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发表时间：
2001-01-01
期刊：
影响因子：
1.8
通讯作者：
Fisher, J
中科院分区：
文献类型：
--
作者：
Firkins, PJ;Tipper, JL;Fisher, J
现在对髋关节假体的金属对金属轴承有相当大的兴趣。在一些模拟器研究中报道了极低的磨损率(0.1 mm（3)/10(6)个循环），而在体内的研究虽然仍然很低，但已经显示了1 mm(3)/10(6)个循环的磨损率。本研究的目的是比较两个具有不同运动学输入的髋关节模拟器中金属对金属轴承的磨损率。在具有三个独立输入运动的模拟器中，产生了一个低偏心水平的开放椭圆磨损路径，磨损率与其他模拟器的记录非常低。在两个输入运动产生较大偏心率的开放椭圆磨损路径的模拟器中，磨损率至少高出10倍，更接近临床值。接触中的运动和运动学条件是金属对金属轴承磨损的关键决定因素。
There is now considerable interest in metal-on-metal bearings for hip prostheses. Extremely low wear rates (0.1 mm(3)/10(6) cycles) have been reported in some simulator studies, while in vivo studies, although still very low, have shown wear rates of the order of 1 mm(3)/10(6) cycles. The aim of this study was to compare wear rates of metal-on-metal bearings in two hip simulators with different kinematic inputs. In the simulator with three independent input motions which produced an open elliptical wear path with a low level of eccentricity, the wear rates were very low as recorded previously in other simulators. In the simulator with two input motions which produced an open elliptical wear path with greater eccentricity the wear rate was at least ten times higher and closer to clinical values. The motion and kinematic conditions in the contact are critical determinants of wear in metal-on-metal bearings.