The patient will be asked for a brief medical history so that we may determine if the patient can participate in the study. A member of our research team will ask the patient a series of questions about his/her knee. The patient will be asked to answer this series of questions a total of 4 times over the course of 1 year. Also, we will record how well the patient can bend and straighten your knee at these 4 office visits. We will have the patient rate the pain in his/her knee and ask the patient if he/she is satisfied with the surgery. If the patients have any complications, those will also be recorded. The patient will also have X-rays taken of the knee at the postoperative follow-up visits. This is the normal routine following total knee replacement. The X-rays will be read by the surgeon to help determine the success of the surgery.