Long-term Study of The Press Fit Condylar (P.F.C.) Sigma Total Knee Replacement System

The main purpose of this study is to record information from clinical and radiographic examinations and patient assessment questionnaires before surgery and at suitable postoperative intervals to assess the functioning and symptomology of each knee following surgery. In addition, any adverse events or complications are to be recorded, and any device failures or early revisions are to be recorded and reported directly to the Sponsor. The data are to be used in an evaluation of the performance of the P.F.C. Sigma knee implants over a minimum of 5 years.