PRESS-FIT CONDYLAR TOTAL KNEE ARTHROPLASTY - 5-YEAR TO 9-YEAR FOLLOW-UP EVALUATION

Between November 1984 and December 1987, 378 consecutive Press-Fit Con dylar (PFC, Johnson S Johnson Professional, Raynham, MA) total knee ar throplasties were performed in 290 patients. The average age at surger y was 67 years (range, 22-91 years). The average follow-up period was 6.5 years (range, 5-9 years). Scoring was carried out according to the Knee Society scoring system. The average preoperative knee score was 28, and the average postoperative knee score was 88. The average preop erative functional knee score was 49, and the average postoperative fu nctional knee score was 72. Ninety-five percent of the patients had no pain on level walking and were satisfied with their functional result . The average postoperative knee flexion was 110 degrees. No implant s howed any evidence of radiographic loosening. There were 17 complicati ons, all requiring reoperation. Complications included excessive wear of a metal-backed patella in 8 knees. If complications resulting from the earlier use of a metal-backed patella are eliminated, the overall complication rate is 2.9%, which is comparable to or lower than the ra tes for other total knee systems with similar follow-up periods.