人工代用关节是终身埋藏于体内的异物,将长期接触近似海水含盐浓度的人体体液,由于人体生物酶的作用,离子的溶解、交换和相互渗透,组织液中的P_H值,也可随着受压变化而下降,尽管是高级金属材料也同样产生电解、氧化而易磨损,塑料替代材料又有一 Artificial replacement joint is buried in the body of foreign body for a long time, the body will contact with the seawater salinity concentration of the body fluid for a long time, due to the role of human biological enzymes, ion dissolution, exchange and mutual penetration, tissue fluid P_H value, Pressure changes and decline, although the advanced metal materials also produce electrolysis, oxidation and easy to wear, there is a plastic alternative material