Frye Benjamin M, Laughery Kelsey R, Klein Adam E
Department of Orthopaedics, West Virginia University, Morgantown, WV, USA.
Arthroplast Today. 2021 Mar 7;8:103-109. doi: 10.1016/j.artd.2021.02.001. eCollection 2021 Apr.
Oxinium implants are composed of a zirconium alloy with a hard ceramic surface formed by oxidization of the outer layer. This material has been shown to be an effective bearing surface for total joint arthroplasty and an alternative material for use in patients with metal hypersensitivity. Reports exist of metallosis due to unintended wear of Oxinium components from multiple mechanisms including polyethylene liner dissociation and joint instability. This metallosis creates a distinct appearance on radiographic imaging similar to that of an arthrogram. We report 2 cases of metallosis and describe the characteristic radiographic appearance of failed oxidized zirconium implants.
氧化锆植入物由一种锆合金组成，其外层通过氧化形成坚硬的陶瓷表面。这种材料已被证明是全关节置换术的有效承重表面，也是金属过敏患者的替代材料。有报道称，由于多种机制导致氧化锆部件意外磨损，如聚乙烯衬垫分离和关节不稳定，会引发金属沉着病。这种金属沉着病在影像学上呈现出与关节造影相似的独特外观。我们报告了2例金属沉着病病例，并描述了氧化锆植入物失败后的特征性影像学表现。
