Simultaneous mobile- and fixed-bearing total knee replacement in the same patients. A prospective comparison of mid-term outcomes using a similar design of prosthesis.
We conducted a randomised prospective study to evaluate the clinical and radiological results of a mobile- and fixed-bearing total knee replacement of similar design in 174 patients who had bilateral simultaneous knee replacement. The mean follow-up was for 5.6 years (5.2 to 6.1). The total knee score, pain score, functional score and range of movement were not statistically different (p > 0.05) between the two groups. Osteolysis was not seen in any knee in either group. Two knees (1%) in the mobile-bearing group required revision because of infection; none in the fixed-bearing group needed revision. Excellent results can be achieved with both mobile- and fixed-bearing prostheses of similar design at mid-term follow-up. We could demonstrate no significant clinical advantage for a mobile bearing.
The Joint Replacement Center of Korea, Ewha Womans University, ChongRo 6-Ga, ChongRo-Gu, Seoul 110-783, Korea. younghookim@ewha.ac.kr
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D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000379:methods / Q000592:standards*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007593:Joint Instability; D007720:Knee Prosthesis / Q000592:standards*; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000000981:diagnostic imaging / Q000601:surgery*; D011183:Postoperative Complications; D011446:Prospective Studies; D011859:Radiography; D016896:Treatment Outcome; D016474:Weight-Bearing