Osteoarthritis (OA), a chronic condition that causes the cartilage between the joints to wear out, is the most prominent form of arthritis. The absence of cushion causes bones to rub and grind together, causing swelling, stiffness, and pain. Doctors may prescribe physical therapy, a knee brace, or oral medication. However, if a patent continues to experience severe pain, swelling or extensive joint damage, knee injections or a full knee replacement is recommended.
Hip and knee replacement is one of the most widely performed surgical procedures in the world.
Two Patient Reported Outcomes that surgeons use to assess the success of arthroplasty are the Western Ontario and McMaster Universities (WOMAC) Osteoarthritis Index and the Oxford Knee Score.