Second Orthopaedic Clinic, Department of Orthopaedics and Traumatology, Plastic Surgery and Rehabilitation, University of Florence, CTO-Largo Palagi 1, 50139 Florence, Italy.
Clin Orthop Relat Res. 2010 May;468(5):1258-63. doi: 10.1007/s11999-009-1109-y. Epub 2009 Oct 2.
Osteolysis secondary to polyethylene wear is one of the major factors limiting long-term performance of TKA. Oxidized zirconium is a new material that combines the strength of a metal with the wear properties of a ceramic. It remains unknown whether implants with a zirconium femoral component can be used safely in TKA. To answer that question, we reviewed, at a minimum of 5 years, the clinical outcome and survivorship of a ceramic-surfaced oxidized zirconium femoral component implanted during 98 primary TKAs between April 2001 and December 2003. Survivorship was 98.7% at 7 years postoperatively. No revision was necessary and only one component failed because of aseptic loosening. Mean Knee Society score improved from 36 to 89. No adverse events were observed clinically or radiologically. These results justify pursuing the use of oxidized zirconium as an alternative bearing surface for a femoral component in TKA.
Level IV, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.
聚乙烯磨损引起的骨溶解是限制 TKA 长期性能的主要因素之一。氧化锆是一种新材料，它结合了金属的强度和陶瓷的耐磨性。目前尚不清楚使用氧化锆股骨部件的植入物是否可以在 TKA 中安全使用。为了回答这个问题，我们回顾了 2001 年 4 月至 2003 年 12 月期间进行的 98 例初次 TKA 中使用陶瓷表面氧化锆股骨部件的临床结果和生存率，至少随访 5 年。术后 7 年的生存率为 98.7%。不需要翻修，只有一个部件因无菌性松动而失效。平均膝关节协会评分从 36 分提高到 89 分。临床和影像学均未观察到不良事件。这些结果证明，在 TKA 中，氧化锆可以作为股骨部件的替代轴承表面。
IV 级，治疗研究。有关证据水平的完整描述，请参见作者指南。
