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Seventy-seven anatomically graduated components (AGC) total knee arthroplasties (TKA) were performed on 52 patients with juvenile chronic arthritis. According to the nature of previous surgery on the knee, the patients were subdivided into three groups. The mean age at onset of disease in 23 patients with previous synovectomy of the knee was 11 (1.5-16) years, the mean age at the time of synovectomy was 20 (4-42) and the mean age when arthroplasty was performed was 31 (18-45) years. In nine patients with previous epiphyseal stapling, the mean age at disease onset was 4 (1.5-8) years, at stapling 8 (4-16) years, and at arthroplasty 23 (18-30) years. In patients with no previous surgery, the mean age at disease onset in this group was 7 (1.5-16) years and the mean age at arthroplasty 34 (16-64) years. Patients with need for epiphyseal arrest had an early disease onset and knee replacement in early adulthood. The mean age at knee replacements was highest in the group with no prior surgery.

Previous synovectomy or epiphyseal stapling and the influence on knee replacement in juvenile chronic arthritis