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  • Title: Salvaging unstable or recurrent dislocating total hip arthroplasty with the constrained acetabular component.
    Author: Stanton DA, Bruce WJ, Goldberg JA, Walsh W.
    Journal: J Orthop Surg (Hong Kong); 2002 Dec; 10(2):165-9. PubMed ID: 12493929.
    Abstract:
    PURPOSE: To review cases of implantation of constraining acetabular components for unstable or recurrent dislocating total hip arthroplasty at the Department of Orthopaedics, Concord Hospital, Sydney. METHODS: A retrospective analysis was performed on prospectively collected data of 13 consecutively enrolled patients. RESULTS: From 1989 to 2000, 13 constraining acetabular components were implanted into 13 patients as a revision procedure. The surgical approach for the implantation of the constrained liner was posterolateral in 11 cases; a modified Hardinge approach was applied in 2 cases. The mean clinical follow-up duration was 43 months (range, 14-121 months) and the mean age at the time of surgery was 73 years (range, 52-84 years). No patients were lost to follow-up. Indications for using the constrained acetabular component were recurrent dislocation in revision hip replacements (n=8), and intra-operative instability (n=5). There were no episodes of dislocation of the constrained arthroplasty. In 7 cases, the constrained component was implanted into a previously well-fixed shell. CONCLUSION: We recommend the judicious use of the constrained component in cases of hip instability during or after total hip arthroplasty when other methods are not successful.
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