Ulrich Paul A, Zondervan Robert L, Cochran Jason M
McLaren Greater Lansing Hospital, Lansing, MI, USA.
Sparrow Hospital, Lansing, MI, USA.
Arthroplast Today. 2022 Aug 19;17:80-86. doi: 10.1016/j.artd.2022.07.010. eCollection 2022 Oct.
We report a case series of 2 patients with screw/shell interface failure in the Stryker Trident II Acetabular System. Both failures consisted of screw penetration through the Trident II acetabular shell. One failure was observed postoperatively after a revision from a cephalomedullary nail to a total hip arthroplasty while the other was observed intraoperatively during a primary total hip arthroplasty. Both component failures were managed conservatively with weight-bearing as tolerated and radiographic monitoring. These are the first reported cup/screw failures of the Stryker Trident II system and should raise awareness of the potential complication and implant design flaw. When placing acetabular screws, we recommend obtaining intraoperative orthogonal screw radiographs that are tangential to the shell surface to assess for screw/shell failure.
我们报告了一组2例Stryker Trident II髋臼系统中螺钉/髋臼杯界面失败的病例。这两例失败均表现为螺钉穿透Trident II髋臼杯。其中1例失败发生在从股骨髓内钉翻修为全髋关节置换术后，另一例失败则在初次全髋关节置换术中被术中发现。两例假体失败均采用耐受范围内负重及影像学监测的保守治疗方法。这些是Stryker Trident II系统首次报告的髋臼杯/螺钉失败病例，应提高对这一潜在并发症及植入物设计缺陷的认识。放置髋臼螺钉时，我们建议术中获取与髋臼杯表面相切的正交螺钉X线片，以评估螺钉/髋臼杯失败情况。
