20 November 2014 : Original article
Mid-Term Results of Metal-on-Metal Hip Resurfacing for Treatment of Osteoarthritis Secondary to Developmental Dysplasia of the Hip: A Minimum of 8-Years of Follow-UpYuxing QuDE, Tao JiangC, Hong ZhaoB, Yi GaoB, Chong ZhengD, Jianda XuA
Med Sci Monit 2014; 20:2363-2368
BACKGROUND: Metal-on-metal resurfacing arthroplasty is an attractive alternative to conventional total hip arthroplasty in patients with osteoarthritis secondary to developmental dysplasia of the hip (DDH). The purpose of this study was to assess the mid-term clinical outcome and mid-term survivorship of Metal-on-metal resurfacing arthroplasty in patients suffering from osteoarthritis secondary to DDH.
MATERIAL AND METHODS: Between May 2003 and Dec. 2005, 15 operations using ASR™ and 19 using Corin were performed in 29 patients to treat advanced osteoarthritis secondary to DDHs. There were 6 males (20.7%) and 23 females (79.3%), with an average age of 47.2 years (range, 36–64 years). Clinical and radiographic results were observed. All patients were followed up at the 1st, 2nd, 3rd, 6th, and 12th months after surgery and annually thereafter.
RESULTS: The overall survival was 88.2% at a minimum follow-up of 8 years, but the survival was 91.2% after excluding the infections as the cause of component loosening and failure. The mean Harris hip score improved from 48.27±3.13 (range, 14–71) to 89.63±3.42 (range, 65–100) at latest follow-up. The flexion was from 75.14±8.05° to 107.21±9.34. Only 4 failed because of deep infection, femoral neck fracture, and aseptic loosening.
CONCLUSIONS: Metal-on-metal resurfacing arthroplasty showed perfect results at a minimum of 8-years of follow-up in our study, and may be a reasonable option for osteoarthritis secondary to developmental dysplasia of the hip (DDH).
Keywords: Arthroplasty, Replacement, Hip, Femur Neck - surgery, Follow-Up Studies, Hip Dislocation, Congenital - radiography, Hip Prosthesis - adverse effects, Kaplan-Meier Estimate, Metal-on-Metal Joint Prostheses - adverse effects, Osteoarthritis - surgery, Postoperative Care, Postoperative Complications - etiology, Preoperative Care, Time Factors
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