Heiner Anneliese D, Tikekar Nishant M, Kruger Karen M, Lannutti John J, Brown Thomas D
Department of Orthopaedics and Rehabilitation University of Iowa, Iowa City, IA ; Department of Biomedical Engineering University of Iowa, Iowa City, IA.
Department of Materials Science and Engineering Ohio State University, Columbus, OH.
Iowa Orthop J. 2014;34:84-93.
Retrieval analysis of total joint arthroplasty components has primarily focused on assessing wear or other damage to polyethylene components. As damage to the opposing bearing surface can accelerate polyethylene wear and damage, and especially with the use of hard-on-hard articulations, retrieval analysis benefits from incorporating evaluation of hard bearing surfaces as well. The purpose of this study is to report six case studies of metal bearing surfaces with distinctive damage patterns, to interpret them in the context of adverse events plausibly responsible for their creation, and to suggest their likely clinical or scientific significance. The specific damage patterns reported here are 1) extensive scraping, 2) circumferential discoloration, 3) a long chain of periodic micro-indentations, 4) pitting with deposits, 5) scratches with small-radius directional changes, and 6) indentation with scraping.
全关节置换部件的取出分析主要集中在评估聚乙烯部件的磨损或其他损伤。由于相对的承重表面的损伤会加速聚乙烯的磨损和损坏，特别是在使用硬对硬关节的情况下，取出分析也受益于对硬承重表面的评估。本研究的目的是报告六个具有独特损伤模式的金属承重表面的案例研究，在可能导致这些损伤的不良事件的背景下对其进行解读，并指出其可能的临床或科学意义。这里报告的具体损伤模式为：1）广泛刮擦，2）圆周变色，3）一连串周期性微压痕，4）伴有沉积物的点蚀，5）小半径方向改变的划痕，6）伴有刮擦的压痕。
