Thompson Samuel F, Peterson Blake E, Aggarwal Ajay
University of Missouri School of Medicine, Columbia, MO, USA.
University of Missouri Department of Orthopaedic Surgery, Columbia, MO, USA.
Arthroplast Today. 2015 Mar 20;1(1):7-10. doi: 10.1016/j.artd.2015.01.001. eCollection 2015 Mar.
A 62-year-old man underwent total knee arthroplasty using a mobile-bearing prosthesis. Four days post-operatively the patient experienced the first of several acute knee dislocations. Closed reduction was performed at an outside hospital a total of three times prior to presentation at this institution. A two-stage exchange of the TKA was recommended due to the clinical suspicion for an infected prosthesis. Upon surgical exploration, it was discovered that the polyethylene insert had spun out completely to 180°. Closed reduction attempts of a posterior dislocation of a mobile-bearing knee prosthesis may contribute to complete 180° spinout of the polyethylene insert.
一名62岁男性接受了使用活动平台假体的全膝关节置换术。术后四天，患者经历了多次急性膝关节脱位中的第一次。在转至本院之前，在外院共进行了三次闭合复位。由于临床怀疑假体感染，建议进行两阶段的全膝关节置换翻修术。手术探查时发现，聚乙烯衬垫已完全旋转180°。对于活动平台膝关节假体后脱位进行闭合复位尝试可能会导致聚乙烯衬垫完全旋转180°。
