Post Market Follow-Up Study of the EVOLUTION® Total Knee Arthroplasty System With Cruciate Sacrificing Inserts

Inclusion Criteria: To be included in the study, subjects must meet all of the following criteria: * Has previously undergone primary TKA for any of the following: * non-inflammatory degenerative joint disease including osteoarthritis, traumatic arthritis, or avascular necrosis; * inflammatory degenerative joint disease including rheumatoid arthritis * correction of functional deformity. * Subject was implanted with the specified combination of components * Subject is willing and able to complete required study visits and assessments * Subject plans to be available through the 10 year postoperative follow-up visit * Subject is willing to sign the approved Informed Consent document * Subject must be at least 2 years post TKA prior to informed consent. Previously implanted bilateral subjects can have both TKAs enrolled in the study provided: 1) the specified combination of components were implanted in both, 2) all other aspects of the Inclusion/Exclusion Criteria are satisfied, 3) enrollment does not exceed the subject count specified in the Clinical Trial Agreement, and 4) the subject agrees to a second Informed Consent document specific to the second TKA. Prospective enrollment of a previously unimplanted knee is not permitted in this study. Exclusion Criteria: Subjects will be excluded if they meet any of the following criteria: * Subject was skeletally immature (less than 21 years of age) at time of implantation * Subject is currently enrolled in another clinical investigation * Subject is unwilling or unable to sign the Informed Consent document * Subject has documented substance abuse issues * Subject has an emotional or neurological condition that would pre-empt their ability or willingness to participate in the study * Subject has a body mass index (BMI) of greater than 40 * Subject is currently incarcerated or has impending incarceration