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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part H. Journal of Engineering in Medicine >Wear in metal-on-metal total disc arthroplasty
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Wear in metal-on-metal total disc arthroplasty

机译：金属对金属全椎间盘置换术中的磨损

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摘要

The wear of a model metal-on-metal ball-and-socket total disc arthroplasty was measured in a simulator. The ball had a radius of 10 mm, and there was a radial clearance between ball and socket of 0.015 mm. The model was subjected to simultaneous flexion-extension, lateral bending, axial rotation (frequency: 1 Hz) and compression (frequency: 2 Hz, maximum load: 2 kN). Throughout the tests, the models were immersed in calf serum diluted to a concentration of 15 g protein per litre, at a controlled temperature of 37 ℃. Tests were performed on three models. At regular intervals (0, 0.5, 1, 2, 3, 4 and 5 million cycles), mass and surface roughness were determined; mass measurements were converted into the volume lost as a result of wear. All measurements were repeated six times. Wear occurred in two stages. In the first stage (duration about 1 million cycles), there was a linear wear rate of 2.0160.04mm~3 per million cycles; in the second stage, there was a linear wear rate of 0.7660.02mm~3 per million cycles. Surface roughness increased linearly in the first million cycles and then continued to increase linearly but more slowly.
机译：在模拟器中测量了模型金属对金属球窝全椎间盘置换术的磨损。球的半径为10毫米，球与承窝之间的径向间隙为0.015毫米。对该模型同时进行屈伸，横向弯曲，轴向旋转（频率：1 Hz）和压缩（频率：2 Hz，最大载荷：2 kN）。在整个测试过程中，将模型浸入小牛血清中，稀释至每升15 g蛋白质的浓度，控制温度为37℃。在三个模型上进行了测试。以规则的时间间隔（0、0.5、1、2、3、4和5百万个循环）确定质量和表面粗糙度。质量测量值转换为因磨损而损失的体积。所有测量重复六次。磨损分为两个阶段。在第一阶段（持续约一百万次循环），线性磨损率为2.0160.04mm〜3 /百万次循环。在第二阶段，每百万次循环的线性磨损率为0.7660.02mm〜3。在前一百万个循环中，表面粗糙度线性增加，然后继续线性增加，但速度较慢。

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