Complications Encountered With the Use of Constrained Acetabular Prostheses in Total Hip Arthroplasty |
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Authors: | Christophe Pattyn Roel De Haan Alex Kloeck Georges Van Maele Koen De Smet |
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Affiliation: | ? Department of Orthopedic Surgery and Traumatology, Ghent University Hospital, Gent, Belgium;† Anca Medical Center Ghent, Ghent Belgium;‡ Department of Medical Informatics and Statistics, Ghent University Hospital, Gent, Belgium |
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Abstract: | At our department, 46 constrained acetabular components in 38 patients were placed successively for a period of 4 years. Indications included recurrent dislocation, septic and aseptic loosening with extensive bone loss, tumor surgery with extensive bone resection, and instability due to neurologic impairment. Because 2 cup failures and 10 dislocations were observed with the constrained devices at 4 to 7 years of follow-up, the authors started to use large-diameter metal-on-metal bearings for similar indications. A series of 36 such bearings in 38 patients revealed only one cup failure and one dislocation at 2 to 4 years of follow-up. Although the 2 series are different and therefore difficult to compare, the authors recommend judicious use of constrained devices because of the high failure rate (26%) and consideration of alternative options such as the use of large-diameter metal-on-metal bearings. |
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Keywords: | total hip arthroplasty constrained liners metal-on-metal large-diameter heads complications dislocation |
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