Hip resurfacing with MOM bearings is the fastest growing procedure in the world and is playing a major role in the treatment of osteoarthritis (OA), especially for young patients [20-24]. However, most of the results published to date relate to resurfacing in a population essentially composed of patients treated for idiopathic or "primary" OA. In Asia, primary OA is extremely rare [25,26], and hip arthroplasty essentially applies to degenerative changes secondary to developmental dysplasia of the hip (DDH), osteonecrosis (ON), posttrauma (PT), slipped capital femoral epiphysis (SCFE), Legg-Calve-Perthes (LCP) disease, and inflammatory diseases (rheumatoid arthritis, etc.). Kobayashi et al. have reported the effects of theses differences on the long-term clinical and survivorship results of primary Charnley total hip arthroplas-ties .
The purpose of the present study was to review the indications and assess the clinical results of a current metal-on-metal hip resurfacing design in a population of patients treated for nonprimary OA.
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