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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Wear characteristics of an unconstrained lumbar total disc replacement under a range of in vitro test conditions
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Wear characteristics of an unconstrained lumbar total disc replacement under a range of in vitro test conditions

机译：在一系列体外测试条件下佩戴无约束腰椎间盘的特点

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The effect of kinematics, loading and centre of rotation on the wear of an unconstrained total disc replacement have been investigated using the ISO 18192-1 standard test as a baseline. Mean volumetric wear rate and surface morphological effects were reported. Changing the phasing of the flexions to create a low (but finite) amount of crossing path motion at the bearing surfaces resulted in a significant fall in wear volume. However, the rate of wear was still much larger than previously reported values under zero cross shear conditions. Reducing the load did not result in a significant change in wear rate. Moving the centre of rotation of the disc inferiorly did significantly increase wear rate. A phenomenon of debris re-attachment on the UHMWPE surface was observed and hypothesised to be due to a relatively harsh tribological operating regime in which lubricant replenishment and particle migration out of the bearing contact zone were limited. (c) 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 46-52, 2017.
机译：通过ISO 18192-1标准试验作为基线，研究了运动学，装载和旋转旋转中心对未经约束总椎间盘替换的磨损的影响。报道了均值体积磨损率和表面形态学效应。改变屈曲屈曲以产生低（但有限）的交叉路径运动在轴承表面上导致磨损体积显着下降。然而，在零交叉剪切条件下，磨损率仍然大于先前报道的值。减少负载并没有导致磨损率的显着变化。将光盘的旋转中心移动较差，显着提高磨损率。观察到在UHMWPE表面上重新连接的碎片现象，并假设是由于具有相对苛刻的摩擦工程制度，其中轴承接触区的润滑剂补充和颗粒迁移受到限制。 （c）2015 Wiley期刊，Inc.J生物保解员B部分B：苹果生物摩特，105B：46-52,2017。

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