Osteoarthritis causes damage to the cartilage and limits the movement of the bones. People with this disease are not able to do normal activities, such as bending at the knee, walking, or climbing stairs. Osteoarthitic knee pain gets relieved initially with medication and physiotherapy. Later on, with the progression and advancement of the condition, medications eventually fail to provide a pain free period. This continuous pain, even after treatment, warrants a knee replacement. Rheumatoid arthritis is also one of the main reasons for Total Knee Replacement Surgery. Degenerative arthritis may also result from knee injuries.