Eleven years of experience with metal-on-metal hybrid hip resurfacing: a review of 1000 conserve plus

• Published in: The Journal of arthroplasty Vol. 23; no. 6 Suppl 1; pp. 36 - 43
• Main Authors: Amstutz, Harlan C, Le Duff, Michel J
• Format: Journal Article
• Language: English
• Published: United States 01.09.2008
• Subjects: Adolescent; Adult; Aged; Arthroplasty, Replacement, Hip - methods; Body Mass Index; Female; Follow-Up Studies; Humans; Male; Metals; Middle Aged; Prosthesis Design; Prosthesis Failure; Reoperation
• ISSN: 1532-8406
• DOI: 10.1016/j.arth.2008.04.017

Hip resurfacing is currently the fastest growing hip procedure worldwide. We reviewed 1000 hips in 838 patients who received a Conserve Plus (Wright Medical Technology, Inc., Arlington, Tenn) resurfacing at a single institution. The mean age of the patients was 50.0 years with 74.7% male. The hips were resurfaced irrespective of femoral defect size or etiology. The mean follow-up was 5.6 years (range, 1.1-11.0 years). All clinical scores improved significantly (P < .05). There was no acetabular component loosening. Ten were converted to total hip arthroplasty for femoral neck fracture, 20 for femoral loosening, 2 for sepsis, and 1 for recurrent subluxations. The 5-year survivorship was 95.2% with no failures in hips implanted since 2002. Short-term failures can be prevented. First-generation surgical technique and a low body mass index were the most important risk factors for the procedure. Improvements in bone preparation significantly increased prosthetic survival in hips with risk factors for failure.