Kandemir Göksu, Smith Simon, Joyce Thomas J
School of Engineering, Newcastle University, Newcastle upon Tyne, UK.
Proc Inst Mech Eng H. 2018 Oct;232(10):1008-1016. doi: 10.1177/0954411918796047. Epub 2018 Aug 23.
Generation of wear debris and wear particle-induced osteolysis are the main limitations of metal-on-polyethylene artificial joints. Cross-linked polyethylene has been recently used, particularly in hip replacements, as an alternative material to conventional ultrahigh molecular weight polyethylene due to its superior wear resistance. This study focused on the wear behaviour of cross-linked polyethylene under different contact stresses in order to make interpretations of its long-term in-vivo performance. A 50-station SuperCTPOD (pin-on-disc) machine was used to investigate the influence of contact stress on the wear of cross-linked polyethylene pins which were articulated against cobalt chromium discs. It was found that the wear rate of cross-linked polyethylene was lower at higher contact stresses.
磨损碎屑的产生以及磨损颗粒诱导的骨溶解是金属对聚乙烯人工关节的主要局限性。交联聚乙烯最近已被用作替代材料，特别是在髋关节置换术中，由于其具有卓越的耐磨性，可替代传统的超高分子量聚乙烯。本研究聚焦于交联聚乙烯在不同接触应力下的磨损行为，以便对其长期体内性能作出解释。使用一台50工位的SuperCTPOD（销盘式）机器，研究接触应力对与钴铬盘铰接的交联聚乙烯销磨损的影响。结果发现，在较高接触应力下，交联聚乙烯的磨损率较低。
