Journey II BCS EU Observational Trial

Inclusion Criteria * subject requires primary total knee arthroplasty with the Journey II BCS Total Knee System, including patella resurfacing * subject requires primary total knee arthroplasty due to degenerative joint disease (primary osteoarthritis, post-traumatic arthritis, avascular necrosis, rheumatoid arthritis) * subject is of legal age to consent, agrees to consent to and to follow the study visit schedule, by signing the EC approved informed consent form Exclusion Criteria: * age \> 75 years * conditions that may interfere with the TKA survival or outcome (i.e., Paget's or Charcot's disease, vascular insufficiency, muscular atrophy, uncontrolled diabetes, moderate to severe renal insufficiency or neuromuscular disease) * subject has inadequate bone stock to support the device