Computer assisted knee surgery utilizes computer systems that assists in the positioning of the surgical instruments utilized in the surgery.A digital image, which simulates normal bony anatomy is created.  Over these images surgical instruments are registered.  The whole system guides surgeon during different steps of surgery. It ensures accuracy of the procedure to the extent of fraction of degree and millimeter. Computer assisted surgery is helpful in varieties of knee surgeries. It has its widely established role in knee replacement surgery. 

Computer assisted knee replacement surgery –

Computer Navigation Surgery helps surgeon accurate placement of adequate size artificial knee components. In the arthritic knee joint information provided by computer help in avoiding alignment outliers thus helps in increasing the longevity of knee surgery. The information provided by the computer helps surgeon in executing surgery with minimal soft tissue disruption and lesser bone loss. This helps in less postoperative pain and easy rehabilitation.

In CAS, a computerized model of individual knee is made depending upon the knee anatomy and ligament condition. Surgeon can take guidance from the computer throughout the surgical steps involved in the procedure. Every surgical step can be rechecked thus minimizes any chance of error. Literature and experiences from surgeons from all over the world proves computer assisted total knee replacement superior to conventional total knee replacement.  Using computer navigation for knee replacement surgery reduces the number of outliers and improves overall alignment, leading to better performance and longer life of the implants.