Patients undergo knee replacement surgery to restore the normal function of that joint, and according to the American Academy of Orthopedic Surgeons (AAOS), the annual rate of knee replacement surgery is more than 600,000 operations in the United States of America. The success rate of the procedure increases to more than 95% – if it is performed on the right patient with the right precautions. The cost of a knee joint replacement surgery varies according to many factors such as the orthopedic surgeon’s wage, the quality of care provided within the hospital, the price of the hospital stay – if the patient needs it – and also the price of the joint itself.