5- to 18-year follow-up study of cemented total knee arthroplasty for patients 55 years old or younger.

Seventy-two cemented total knee arthroplasties were performed on 52 patients who were 55 years old or younger. Results on 68 knees in 50 patients with an average follow-up period of 9.92 years are reported. The average age of the patients was 50.7 years (range, 30-55) at the time of surgery. The diagnosis was osteoarthritis in 37 knees, rheumatoid arthritis in 29 knees, and ankylosing spondylitis in 2 knees. The average preoperative Knee Society knee score was 23 and the average follow-up knee score was 97. All knees were rated as good or excellent for knee score. The average latest function score was 75 (preoperative, 36). Both knees in one patient required revision for loose components. This review demonstrates that cemented total knee arthroplasty in younger patients with osteoarthritis and rheumatoid arthritis can attain results comparable to the excellent results obtained in the older age groups.