Abstract
40 primary uncemeneted total knee arthroplasties (MG II) were performed in 32 patients with osteoarthritis. The average age was 73.0 years at the time of surgery. The follow-up period was an average of 5.6 years (range; 5 to 6.6 years). Clinical evaluations based on the Japanese Orthopedic Association score indicated significant improvements from preoperative to the most recent follow-upexamination. There was no evidence of rentogenographic failure in the femoraland tibial component. None of the knees required revision surgery. The flexion angle at the last follow-up correlated well with the last clinical score, especially in the ability of stairs. The clinical score of patients with flexionangle over 110° was significantly better than that under 110°. These mid-term results of uncemented MG II TKAs proved satisfactory in osteoarthritis. However, a longer follow-up period is necessary for problems related to the patellarcomponent even in MG II TKAs, because mal-alignment of the patella-femoral jointhas been observed in 4 knees.
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