Total Knee Arthroplasty Outcome Study

Inclusion Criteria: * Presence of a severely disabled joint secondary to painful osteoarthritis, rheumatoid arthritis, or post-traumatic arthritis that warrants primary knee arthroplasty. * Gender - Males and females will be included. The male-to-female ratio will depend upon the patient population at each institution conducting the study. * Age - Minimum of 18 years-old. * Stable Health - The patient should be able to undergo surgery and participate in a follow-up program based upon physical examination and medical history. * Patient or patient's legal representative has read and signed the Letter to the Patient form. Exclusion Criteria: * Patient is skeletally immature. * Previous ipsilateral knee arthroplasty. * Previous Patellectomy. * Patient is pregnant or breastfeeding. * Presence of clinically significant disease of the cardiovascular, renal, hepatic, hematologic, respiratory, endocrine, neurological, gastrointestinal, genitourinary, immune systems or other medical condition which is not well controlled. * Patients who have received an investigational drug or device within the last 30 days. * Patient is unwilling or unable to cooperate in a follow-up program.