Labek Gerold, Brabec Erich, Frischhut Stephan, Krismer Martin
Department of Orthopaedic Surgery, Medical University Innsbruck, Innsbruck, Austria.
Acta Orthop. 2009 Oct;80(5):545-7. doi: 10.3109/17453670903316819.
After total hip arthroplasty, dislocations are a frequent complication and are difficult to treat in some patients. A great variety of implants and antiluxation mechanisms are used in surgical therapy.
8 patients had 9 Duraloc Constrained Inlays implanted at our clinic between October 2003 and November 2006, for recurrent dislocations. A retrospective follow-up study was carried out.
All patients suffered a failure of the expanding ring, the metal ring being squeezed out of the polyethylene notch. The mechanism of failure can be explained by impingement due to the implant design. At the time of writing, 3 patients have had to undergo revision surgery.
The Duraloc Constrained Inlay has shown unacceptably high failure rates.
全髋关节置换术后，脱位是一种常见并发症，部分患者难以治疗。手术治疗中使用了各种各样的植入物和防脱位机制。
2003年10月至2006年11月期间，8例患者在我院植入了9个Duraloc限制性嵌体，用于复发性脱位。进行了一项回顾性随访研究。
所有患者均出现扩张环失效，金属环从聚乙烯切口中挤出。失效机制可通过植入物设计导致的撞击来解释。在撰写本文时，3例患者不得不接受翻修手术。
Duraloc限制性嵌体的失败率高得令人无法接受。
