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Pinless Computer Navigated Total Knee Replacement- most advanced technique

September 26 2016 , Written by Ambika

 

This is a big boon for the patients with KNEE DEFORMITIES and LEG DEFORMITIES undergoing knee replacements. Computer navigated knee replacement assures complete correction of these deformities. It also decreases the chances of life threatening complication of fat embolism, as one need not drill hole in the medullary canal of the thigh bone.

Pinless Computer Navigated Total Knee Replacement done by Dr Anil Arora (Head of Unit and Lead Consultant,Department of Orthopaedics Max Super Speciality Hospital, Patparganj, Delhi) for Knee Replacement. Dr . Anil Arora in North India is pioneer in this Technology .

Dr . Anil Arora was kind to take some time and talk through about this new technology which makes easier for patients to recover and how technology is new generation in surgery ....

What Is Computer Navigated Knee Replacement Surgery?

The technology of knee replacement has undergone sea changes in last one decade. Total knee replacement nowadays gives predictable and excellent results. Millions of Knee joints are replaced annually throughout the world. In orthopaedic surgery, there is a well-recognised relationship between accuracy and outcome. The surgeons experience in patients’ selection, soft tissue balancing, the alignment of the leg, the restoration of the joint line and also the prosthetic design are all possible factors influencing the success of Knee Replacement. With the help of advancements in computer technology, the surgeons and researchers are constantly working towards achieving perfection in each surgery. One such example is Computer Navigated Knee Replacement Surgery.

 

The procedure of Total Knee Replacement consists of replacing the damaged articular surface of the knee with a knee prosthesis (artificial knee). The position of this implanted knee influences the outcome. The positioning of this implanted knee (artificial Knee) has been conventionally performed and assessed with the use of manual alignment jigs. Despite the continuing improvement in mechanical alignment systems, it has been estimated that the error in (tibial and femoral) alignment of over 3° may still occur in total knee replacements, even when they are carried out by well-trained surgeons, using the most up-to-date mechanical alignment tools. This is due to drawbacks of the conventional alignment systems. More recently, computer navigated systems have been developed to improve the positioning of the prosthesis (artificial knee) components, and balancing of the knee, with the goal of improving the alignment, which in turn is aimed to improve the overall survivorship and life of artificial knee. Computer navigated system for knee replacement has shown to markedly reduce outliers of misalignment of artificial knee, when compared to the conventional technique.

Similar to the alignment of the wheels on your car, a poorly aligned joint replacement will cause problems with early wear of the replacement. An incorrectly aligned joint can lead to early wear and loosening of the joint replacement. Computer navigated system for knee replacement is an additional check to confirm proper placement and balance of the artificial joint replacement.

 

This is a big boon for the patients with KNEE DEFORMITIES and LEG DEFORMITIES undergoing knee replacements. Computer navigated knee replacement assures complete correction of these deformities. Computer navigated Knee replacement also decreases the chances of life threatening complication of fat embolism, as one need not drill hole in the medullary canal of the thigh bone.

 

How it is done?

Computer navigated system for knee replacement uses special sterile probes which are touched to various parts of your knee during surgery to create a 3D Model of your knee in the computer with the help of infrared camera. With the guidance of Computer navigated system for knee replacement, knee is then replaced, and the position of implant confirmed, to be almost hundred percent sure of positioning and balancing.

What is the advancement in Computer navigated system for knee replacement?

Pin Computer navigation technology came into practice about a decade back. But it never became popular because of serious drawbacks. Earlier versions of Computer assisted replacements used drilling extra few pins in thigh and leg bones to attach Arrays (Guides). Drilling extra holes in thigh and leg bones can sometimes lead to complications (risk of bony fractures, pin site infection and bone drill hole infection). So the advantages of earlier version of computer navigation were attended with chances of some extra complications also.

The latest –state of the art- Pinless Navigation does not require drilling extra holes in thigh and leg bones. The latest state of the art PINLESS Computer navigation is recommended rather than using earlier versions of pins. Use of pinless Computer Navigation avoids risks and complications associated with earlier version i.e. pin computer navigation. Pinless navigation is an effective tool for reducing the proportion of outliers, without significantly increasing the duration of surgery and risks. Prof Anil Arora is using this Pinless Computer Navigation System in his cases. This gives advantages of accuracy without increasing the risk of complications. This is the first Pinless system in North India and it is giving excellent results. Prof Anil Arora specializes in performing Primary, Complex and Revision Knee Replacement and Hip Replacement surgeries.

 

Summary

  • Computer navigated surgery is a state-of-the-art surgical technique which lifts the accuracy of knee replacement surgery from around 80 per cent to up to 99.9 percent, thus improving the longevity and functioning of the replace joint.
  • Computer-assisted surgery helps surgeons align the patient's bones and joint implants with a degree of accuracy not possible with the naked eye.
  • Instead of guessing where the mechanical axis or points of reference are the computer tells us, accurately where they are, and it's accurate to within one or two degrees. Much like the tread life of tires is prolonged by a wheel alignment, exact alignment of a knee replacement assures the maximum longevity of a total knee replacement.
  • Everyone is different and so are their knees! Computer navigated surgery takes into account each patient’s shape and size of the knees and allows a surgeon to use, what is essentially a mini GPS system, to register the exact bio-mechanic anatomy of the leg and knee joint to ensure each replacement is as accurate as possible.
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