抄録
Thirty-one AGC-S total knee systems employed in 21 patients were reviewed with a minimum follow-up of 6 months. The mean follow-up period was 2.5 years. There were 17 women and 4 men. The mean age at operation was 73.4 years. The JOA score was used to assess the clinical status before and after surgery. Radiographic evaluations included measurement of the femoro-tibial angle (FTA), placement of each prosthetic component, and patello-femoral (PF) congruence. Radiolucent areas were also recorded. Average JOA score for osteoarthritis was 47.5 before surgery and 72.7 at the latest follow-up examination, while the score for rheumatoid arthritis was 27.6 and 63.2, respectively. The average range of motion improved from 103.4 degrees to 113.0 degrees. FTA and placement of each component were almost the same as planned preoperatively. There was no marked incongruency in PF joint. A radiolucent area around tibial component was present in 7 knees, however, there were no clinical signs of loosening. The design of this prosthesis ensures good alignment, good range of motion and good PF congruence.
