Department of Orthopedics and Rheumatology, University Hospital Marburg, Germany.
J Arthroplasty. 2011 Apr;26(3):445-50. doi: 10.1016/j.arth.2009.11.024. Epub 2010 Feb 9.
Safety of oxidized zirconium (OxZr) in total knee arthroplasty (TKA) has been supported by biomechanical, clinical, and radiologic data. Retrieved OxZr femoral components and corresponding polyethylene (PE) inserts were examined to rule out patterns leading to early failure. Sixteen retrieved TKA with an OxZr femoral component were included. The PE inlays were analyzed applying an established scoring system for wear and surface damage. Femoral components were screened for scratching, pitting, delamination, and striations. The prostheses were in situ for 16.4 ± 11.9 months. The average wear and damage score for the tibial PE inserts was 36.0 ± 12.7. The average score in the visual analysis of the OxZr femoral components was 1.3 ± 1.3. The data presented in this study did not show major wear of the PE in TKA using OxZr components. In this cohort, there were no failures directly related to this implant.
氧化锆（OxZr）在全膝关节置换术（TKA）中的安全性得到了生物力学、临床和影像学数据的支持。对已取出的 OxZr 股骨部件和相应的聚乙烯（PE）嵌体进行了检查，以排除导致早期失效的模式。共纳入 16 例 OxZr 股骨部件的 TKA。采用已建立的磨损和表面损伤评分系统对 PE 嵌体进行了分析。对股骨部件进行了划伤、麻点、分层和条纹的筛查。这些假体原位使用了 16.4±11.9 个月。胫骨 PE 嵌体的平均磨损和损伤评分为 36.0±12.7。OxZr 股骨部件的视觉分析的平均评分为 1.3±1.3。本研究中提供的数据显示，使用 OxZr 部件的 TKA 中 PE 没有出现明显磨损。在本队列中，没有与该植入物直接相关的失效案例。
