Journey II BCS CMS Total Knee System Compared to Other PS Total Knee Systems in PT Setting

Inclusion Criteria: * Undergone unilateral primary total knee replacement with a JOURNEY™ II BCS Total Knee System or other Non-Smith \& Nephew Posterior Stabilized Knee System * Will be initiating outpatient PT ≤ 7 days post-operatively * Has a primary diagnosis of osteoarthritis, degenerative arthritis, or traumatic arthritis * Has pre-operative ROM ≥ 90° * Is skeletally mature in the PI judgment * Is 21 years of age of older * Is willing and able to participate in required follow-up visits at the study site and to complete study procedures and questionnaires * Has consented to participate in the study by signing the IRB/EC approved informed consent for the study * Agrees to follow post- operative physical therapy program Exclusion Criteria: * Significant preoperative varus or valgus deformities (\>15º) * Has received a constrained or deep dish tibial insert * Morbid obesity (BMI \> 40) * Has not obtained required pre-rehabilitation, pre-operative and intra-operative records by week 2 visit * Other comorbidities that may impact outcomes such as osteoporosis, uncontrolled diabetes and active infection * Fibromyalgia requiring treatment * Current or impending incarceration or is a prisoner * In the opinion of the PI has an emotional or neurological condition that would pre-empt their ability or willingness to participate in the study including mental illness, mental retardation, drug or alcohol abuse * Is known to be at risk for lost to follow-up, or failure to return for scheduled visits * Undergone or is planning to undergo total knee replacement of the contralateral knee within 6 months of this total knee replacement * Requires a Legally Authorized Representative to consent to the study