New prospects for a prolonged functional life-span of artificial hip joints by using the material combination polyethylene/aluminium oxide ceramin/metal.
New prospects for a prolonged functional life-span of artificial hip joints by using the material combination polyethylene/aluminium oxide ceramin/metal.
复制标题
通过使用聚乙烯/氧化铝陶瓷蛋白/金属材料组合，延长人工髋关节功能寿命的新前景。
DOI：
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发表时间：
1977
期刊：
影响因子：
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通讯作者：
H. Willert
中科院分区：
文献类型：
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作者：
M. Semlitsch;M. Lehmann;H. Weber;E. Doerre;H. Willert
多年来的研究表明，与金属相比，镜面抛光的 Al2O3 陶瓷是超高分子量 (UHMW) 聚乙烯更合适的摩擦对应物。尽管聚乙烯和Al2O3陶瓷之间的硬度差异极大，但采用这种新型低摩擦材料组合的聚乙烯可以获得相当低的磨损率。这种陶瓷材料与聚乙烯接触时出乎意料的良好摩擦学行为可能归因于以下因素：与迄今为止使用的金属植入材料（AISI-316L钢或铸造Co-Cr-Mo合金）相比，陶瓷材料具有更好的耐腐蚀性能、液体润湿性、表面光泽度、硬度和耐划伤性。看来，通过使用这种新的承窝和球材料组合，将有可能显着延长人工髋关节的使用寿命，而无需对现有设计和植入原理进行任何根本性改变，保留迄今为止使用的由锻造Co-Ni-Cr-Mo-Ti合金Protasul-10制成的锚固轴，具有极高的腐蚀疲劳强度。
Investigations over the years have shown that the mirror-finished Al2O3 ceramic is a much more suitable frictional counterpart to ultrahigh molecular weight (UHMW) polyethylene than metal. Despite the extremely gread hardness difference between polyethylene and Al2O3 ceramic, a considerable lower wear rate is obtained for the polyethylene socked with this new low-friction material combination. The unexpectedly favorable tribological behavior of this ceramic material in contact with polyethylene may be attributed to the following factors: better values for corrosion resistance characteristics, wettability with liquids, surfact gloss, hardness, and scratch resistance of the ceramic material in comparison with those of the hitherto used metallic implant materials (AISI-316L steel or cast Co-Cr-Mo alloy). It appears that, by using this new combination of materials for the socket and the ball, it will be possible to prolong the service life of artificial hip joints considerably without having effecy any fundamental changes in the present design and implantation principle retaining the hitherto used anchorage shaft made of wrought Co-Ni-Cr-Mo-Ti alloy Protasul-10 of extremely high corrosion fatigue strength.