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  • Title: Hip resurfacing arthroplasty for end-stage arthritis caused by childhood hip disease.
    Author: Su EP, Morgenstern R, Khan I, Gaillard MD, Gross TP.
    Journal: Hip Int; 2020 Sep; 30(5):572-580. PubMed ID: 31232105.
    Abstract:
    INTRODUCTION: Patients with hip arthritis due to Legg-Calvé-Perthes (LCP) and slipped capital femoral epiphysis (SCFE) pose altered femoral anatomy, making hip resurfacing arthroplasty (HRA) technically complicated. We examined implant survival and clinical symptoms in patients with a history of LCP or SCPE who underwent HRA for end-stage osteoarthritis. METHODS: Data was collected for patients who underwent HRA for osteoarthritis due to LCP (n = 59) or SCFE (n = 32). Harris Hip Scores (HHS), UCLA activity scores, and radiographs were evaluated pre and postoperatively. Wilcoxon Signed-Rank Tests and Kaplan-Meier Survivorship curves were used to analyse data. RESULTS: Survivorship for freedom from revision or clinical failure was 93.55(95% CI, 78.47-98.18) at 5.79 years, up until the most recent follow-up of 11.23 years. There were 3 failures: 1 LCP due to instability at 2.4 years, 1 SCFE due to femoral neck fracture at 1 month, and another SCFE due to unexplained pain at 5.8 years. Five patients, 1 LCP and 4 SCFE, had retained hardware prior to surgery; 4 had their hardware removed during surgery. Postoperatively HHS and UCLA activity scores increased (p < 0.0001, for both measures). Leg-length discrepancy improved preoperatively from 7.9 (0.0-32) mm to 0.65 (0.0-10) mm postoperatively (p < 0.0001). Follow-up radiographs of all non-failure HRA patients revealed implants to be in good alignment with no indication of loosening. CONCLUSION: Although HRA in SCFE and LCP patients increases technical difficulties, findings demonstrate excellent implant survival, no intraoperative complications, and improvements in leg-length discrepancies and clinical functional outcomes.
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