Rose R M, Crugnola A, Ries M, Cimino W R, Paul I, Radin E L
Clin Orthop Relat Res. 1979 Nov-Dec(145):277-86.
Scanning electron microscope examination of the polyethylene components of 8 total hip and 16 total knee prostheses which had been implanted 4--96 months revealed that in many cases severe wear may not necessarily be caused by the presence of acrylic cement debris or other abrasives. The craters and cracks observed on severely worn surfaces are associated with fusion defects in the plastic itself. The fusion defects were seen to occur as a result of the low temperature necessary to mold ultrahigh molecular weight polyethylene and are (at least at present) difficult to avoid. As a consequence of the above and variability of molecular weight in this material, relatively wide variations in wear rate should be expected even in the absence of acrylic debris.
对植入4至96个月的8个全髋关节和16个全膝关节假体的聚乙烯部件进行扫描电子显微镜检查发现，在许多情况下，严重磨损不一定是由丙烯酸骨水泥碎片或其他磨料的存在引起的。在严重磨损表面观察到的凹坑和裂纹与塑料本身的融合缺陷有关。融合缺陷被认为是由于模制超高分子量聚乙烯所需的低温而产生的，并且（至少目前）难以避免。由于上述情况以及这种材料分子量的变异性，即使没有丙烯酸碎片，磨损率也应预期会有相对较大的变化。
