Callaghan John J, O'Rourke Michael R, Goetz Devon D, Lewallen David G, Johnston Richard C, Capello William N
University of Iowa College of Medicine, Iowa City, IA, 52242, USA.
Clin Orthop Relat Res. 2004 Dec(429):117-23. doi: 10.1097/01.blo.0000150276.98701.95.
Constrained acetabular components have been used to treat certain cases of intraoperative instability and postoperative dislocation after total hip arthroplasty. We report our experience with a tripolar constrained component used in these situations since 1988. The outcomes of the cases where this component was used were analyzed for component failure, component loosening, and osteolysis. At average 10-year followup, for cases treated for intraoperative instability (2 cases) or postoperative dislocation (4 cases), the component failure rate was 6% (6 of 101 hips in 5 patients). For cases where the constrained liner was cemented into a fixed cementless acetabular shell, the failure rate was 7% (2 of 31 hips in 2 patients) at 3.9-year average followup. Use of a constrained liner was not associated with an increased osteolysis or aseptic loosening rate. This tripolar constrained acetabular liner provided total hip arthroplasty construct stability in most cases in which it was used for intraoperative instability or postoperative dislocation.
受限髋臼组件已被用于治疗全髋关节置换术后的某些术中不稳定和术后脱位病例。我们报告自1988年以来在这些情况下使用三极受限组件的经验。分析了使用该组件的病例在组件失效、组件松动和骨溶解方面的结果。平均随访10年，对于因术中不稳定（2例）或术后脱位（4例）而接受治疗的病例，组件故障率为6%（5例患者的101髋中有6髋）。对于将受限衬垫用骨水泥固定在无骨水泥髋臼壳中的病例，平均随访3.9年时故障率为7%（2例患者的31髋中有2髋）。使用受限衬垫与骨溶解或无菌性松动率增加无关。这种三极受限髋臼衬垫在大多数用于术中不稳定或术后脱位的病例中提供了全髋关节置换结构的稳定性。
