there have been many advancements in technology and science in the recent years india has one of the best centres for orthopaedic cardiac and renal surgery with the advent of computer assisted surgical system the accuracy in the surgery has increasednavigation system ie image guided surgical system in the field of orthopaedics is useful for knee replacement hip replacement and spine surgeryfor knee replacement surgery this system preplans the surgical steps and also assists in performing the surgery accuratelythis greatly reduces the chance of implant malpositioningthis system works on the principle of infrared camera positioning the principle used for ship aeroplane navigationthis helps the surgeon in accurate placement of the implants and also improves the life of the replaced artificial jointdr bharat patel chief joint replacement surgeon samved orthopaedic institute