Why Is Computer Navigation Technology A Step Further ?February 19, 2021 2021-03-16 15:46
Why Is Computer Navigation Technology A Step Further ?
Total knee replacement (TKR) is one of the most commonly performed orthopedic surgery worldwide. It is also one of the most gratifying and rewarding of all orthopedic surgeries. The success of TKR is dependent on various factors that includes patient selection, prosthesis design, pre-operative condition of the joint, surgical technique including proper soft tissue balancing and most importantly, component and limb alignment.
Computer aided navigation technology is the recent method for improving the accuracy of Knee Replacement. The navigation reduces the human error with better implant position and improved knee balancing.
Why is Navigation a Step Further ?
Conventionally, while doing a knee replacement, surgeon uses his own manual judgement aided by the use of jigs and alignment guides using important bony landmarks to align the knee components over the bone. It has been observed that despite the available instrumentation system, at times, errors are unavoidable especially in cases with significant preoperative deformity around the joint. Thus this error ends up reducing the surgical accuracy with conventional technique even in the hands of very experienced surgeons.
Image of Knee alignment
This is an osteoarthritic knee with a varus deformity in which the knee is being bend inward. This causes abnormal walking patterns and leads to deterioration of joint and worsening of pain.
This is a replaced knee with improved alignment. Computer navigation helps to identify the amount of soft tissue release and amount of bone cuts to be done to achieve this alignment.
How it is done?
Computer Navigation is the Infra- red based real time tool providing real time visual information about the accuracy of the bone cuts, implant positioning, ligament balancing, and final alignment of the limb.
We use infrared markers and trackers are to mark the bony landmarks. Capturing of data is by the Infrared cameras in the navigation system which generates a real time 3D model of the patient’s knee joint. Also, the landmarks which are vital for implant positioning but cannot be seen by human eye or approximated with conventional instruments (hip centre and ankle centre) are accurately located with the help of software algorithms. The whole exercise improves the implant positioning, well balanced knee hence, improved longevity of the implant.
How Can I Be Sure That The Surgery Performed On Me Is Done Manually Or With Computer Navigation?
At the end of surgery, the computer generates a surgery report. The generated report has details of all the real time images captured during various steps of surgery. We preserve the report in our records and gives to patients on demand.
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