Patients receiving TKA were prospectively enrolled before surgery and randomized intraoperatively to either receive patella replacement or not in both knee of same patients. Subjects were assessed pre-operatively and at 6 months, 1, 2 years postoperatively for pain, function, and stiffness using a disease-specific (Western Ontario and McMaster Osteoarthritis Index [WOMAC]) . Other measurements like Knee Society score, Feller's score, Patient satisfaction (VAS) also checked pre-operatively and at 6 months, 1, 2 years postoperatively.