I use three criteria in selecting patients for total joint replacement surgery. The patient who meets all the three criteria are eligible for surgery. First, I inquire about joint pain with limited mobility due to which a patient can no longer perform even their daily tasks such as climbing stairs or stepping in and out of the tub. Then, I examine the painful knee or hip for range of motion and shape, as well as patient’s gait, or manner of walking. Finally, I review diagnostic imaging results to find out if the patient suffers from arthritic degeneration of the joint. The patient fulfilling all t three criteria will be considered for the procedure.