Computer-navigated surgery is a newer technology offering great precision & error free joint replacement surgery for knee and hip joints. With the use of GPS technology and 3D computer images, a joint replacement surgeon can move the instruments with more precision and place the implant at right place. Computer imaging system allows surgeon during the surgery to see the anatomy of joint and mechanics of each patient’s joint. Computer-navigated technology combined minimally invasive surgery with offers great benefits to patients with precise alignment, patient comfort and fast recovery.