Orthopaedic Department, Radboud University Medical Center, Nijmegen, The Netherlands.
J Arthroplasty. 2010 Apr;25(3):497.e17-9. doi: 10.1016/j.arth.2009.02.010. Epub 2009 Apr 1.
Dislocation of the bearing of the Oxford medial unicompartmental arthroplasty is a rare but serious complication. We report the case of a 48-year-old woman with a classic anteromedial arthritis who had 2 bearing dislocations within the first 3 months after index surgery. These were attributable to posterior bony impingement of the bearing against a small retained osteophyte. After arthroscopic resection of the osteophyte, she has retained her original components with no further dislocations or signs of impending failure 7 years later. This case report emphasizes the importance of osteophyte removal from the back of the femoral condyle during an Oxford unicompartmental arthroplasty.
牛津内侧单髁关节置换术后的轴承脱位是一种罕见但严重的并发症。我们报告了一例 48 岁女性，具有典型的前内侧关节炎，在指数手术后的头 3 个月内发生了 2 次轴承脱位。这些脱位归因于轴承对小的残留骨赘的后骨撞击。在关节镜下切除骨赘后，7 年后她仍然保留了原来的组件，没有再出现脱位或即将失败的迹象。这个病例报告强调了在牛津单髁关节置换术中从股骨髁后背部切除骨赘的重要性。
