Brazier Brett G, Wren Ethan R, Blackmer Michael J, Marino Dominic V, Cochran Jason M
College of Osteopathic Medicine, Michigan State University, East Lansing, MI, USA.
Department of Orthopedic Surgery, Michigan State University, East Lansing, MI, USA.
Arthroplast Today. 2018 Apr 22;4(3):275-278. doi: 10.1016/j.artd.2018.03.004. eCollection 2018 Sep.
The following case demonstrates an example of a catastrophic failure of a dual mobility (DM) bearing used in the setting of a revision total hip arthroplasty for an acetabular component with an excessive abduction angle. Currently, in the literature, it has been demonstrated that DM bearings have decreased polyethylene wear at abduction angles up to 65°; however, this has only been shown in in vitro studies. To our knowledge, there have been no reports of in vivo DM bearings that have demonstrated these same results. In this case, a DM bearing was used in a revision surgery with a retained acetabular component that had an abduction angle of approximately 70°-75° which ultimately led to catastrophic polyethylene failure.
以下病例展示了在翻修全髋关节置换术中，用于髋臼组件且外展角度过大的双动（DM）轴承发生灾难性故障的一个例子。目前，文献表明，DM轴承在高达65°的外展角度下可减少聚乙烯磨损；然而，这仅在体外研究中得到证实。据我们所知，尚无体内DM轴承显示出相同结果的报道。在本病例中，在翻修手术中使用了DM轴承，髋臼组件保留，其外展角度约为70° - 75°，最终导致聚乙烯灾难性故障。
