Why Partial Knee Replacement is best for Osteoarthritis Treatment Osteoarthritis | Arthritis of joints is second only to heart disease in causing disability in patients. Arthritis affects more than 50-60% of the population above 55 yrs of age. In INDIAN population knee is the most commonly affected it. As it has complex motion pattern and large weight-bearing surfaces. Symptoms of arthritis are the pain, swelling, difficulty in carrying out daily activities, night pain. Anatomically knee consist of 3 compartments medial(inner), lateral(outer), and patellofemoral (knee cap). Arthritis is slowly advancing disease of cartilage in which wear and tear of joints start from usually from the inner compartment and if untreated progress to rest of 2 compartments. Traditionally arthritis pain is treated with non-surgically with medicines, physio..and surgically. Although Total knee replacement is an excellent option for pts. With severe end-stage arthritis. Patients with limited or early osteoarthritis i.e. limited to just one compartment of the knee, are good candidates for PARTIAL KNEE REPLACEMENT.