Rose R M, Radin E L
Clin Orthop Relat Res. 1982 Oct(170):107-15.
Direct in vivo measurement of wear of total hip prostheses by radiography is not possible. However, improved in vitro approaches have been developed that agree with clinical observations in all salient points. Such measurements show that the wear of the polyethylene component depends crucially on the molecular weight distribution (and probably on other structural variables). Combined with clinical retrievals, there is evidence that relatively high wear may occur even in the absence of acrylic debris. Although sufficient knowledge exists to reduce wear of the total hip prosthesis to a negligible level, for the total knee replacement with higher contact stresses, presently, this is not the case.
通过放射照相术对全髋关节假体磨损进行直接的体内测量是不可能的。然而，已经开发出了改进的体外测量方法，这些方法在所有关键方面都与临床观察结果相符。此类测量表明，聚乙烯部件的磨损在很大程度上取决于分子量分布（可能还取决于其他结构变量）。结合临床取出物来看，有证据表明，即使在没有丙烯酸碎片的情况下，也可能出现相对较高的磨损。尽管已有足够的知识将全髋关节假体的磨损降低到可忽略不计的水平，但对于接触应力更高的全膝关节置换术而言，目前情况并非如此。
