Knee replacement is a surgical procedure to resurface a knee damaged by arthritis. It is indicated for people suffering from severe arthritis related knee pain and difficulty in walking. Arthritis can be caused by age related cartilage degeneration, inflammatory causes like rheumatoid arthritis or following traumatic knee injury. Knee replacement involves putting metal and plastic parts to cap the damaged ends of the knee joint to relieve pain and improve the quality of life of the patient.