Fisher J, Dowson D
Department of Mechanical Engineering, University of Leeds.
Proc Inst Mech Eng H. 1991;205(2):73-9. doi: 10.1243/PIME_PROC_1991_205_271_02.
The tribology of total artificial replacement joints is reviewed. The majority of prosthesis currently implanted comprise a hard metallic component which articulates on ultra high molecular weight polyethylene surface. These relatively hard bearing surfaces operate with a mixed or boundary lubrication regime, which results in wear and wear debris from the ultra high molecular weight polyethylene surface. This debris can contribute to loosening and ultimate failure of the prostheses. The tribological performance of these joints has been considered and a number of factors which may contribute to increased wear rates have been identified. Cushion bearing surfaces consisting of low elastic modulus materials which can articulate with full fluid film lubrication are also described. These bearing surfaces have shown the potential for greatly reducing wear debris.
本文综述了全人工置换关节的摩擦学。目前植入的大多数假体都包含一个在超高分子量聚乙烯表面上活动的硬质金属部件。这些相对较硬的轴承表面在混合或边界润滑状态下运行，这会导致超高分子量聚乙烯表面产生磨损和磨损碎屑。这些碎屑会导致假体松动并最终失效。本文考虑了这些关节的摩擦学性能，并确定了一些可能导致磨损率增加的因素。还介绍了由低弹性模量材料组成的、能在全液膜润滑下活动的缓冲轴承表面。这些轴承表面已显示出大幅减少磨损碎屑的潜力。
