High failure rate of the Duraloc Constrained Inlay
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Published on: December 20, 2024
Gerold Labek1, Erich Brabec, Stephan Frischhut
1Department of Orthopaedic Surgery, Medical University Innsbruck, Innsbruck, Austria. gerold.labek@efort.org
Background And Purpose:
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.
Methods:
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.
Results:
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.
Interpretation:
The Duraloc Constrained Inlay has shown unacceptably high failure rates.
