-Dr. Kaiwan M. Randeria
Navigating the choice between Robotic or Conventional Knee Replacement
When it comes to robotic knee replacements, patients often imagine the robot strolling into the operating theatre, introducing itself and asking the surgeon to step aside. I assure you, the robot is far too well-behaved for any of that! In fact, if the robot really did all the operating, orthopaedic surgeons would probably be found in the hospital café discussing cricket while the machines got on with the day’s work. But rest assured, that’s not how robotic surgery works.
A robotic knee replacement is not performed by a robot, but by an orthopaedic surgeon who uses a robotic system as an advanced surgical tool. Every decision, every bone cut and every adjustment is made by the surgeon. The robot does not think, it does not improvise and it certainly does not replace surgical judgement. Think of it like driving a modern luxury car. Features such as adaptive cruise control, parking sensors and lane assist make driving safer and more precise, but they do not decide where the car goes. The driver remains firmly in control. A robotic surgical system functions in much the same way. It provides guidance, precision and safeguards while the surgeon remains at the wheel throughout the operation.
So, what exactly is different?
In conventional knee replacement, surgeons use specialised instruments, anatomical landmarks and years of training to remove the damaged joint surfaces and position the implants accurately. It’s a technique that’s evolved over decades and has transformed the lives of millions across the world. Contrary to popular belief, “conventional” does not mean outdated. It simply means that the surgery relies primarily on the surgeon’s experience and expertise rather than computer assistance.
Robotic knee replacement follows exactly the same surgical principles. The difference is that the surgeon is assisted by advanced computer technology, which creates a 3-dimensional model of the patient’s knee and provides real time feedback during surgery. This allows the surgeon to plan the operation with remarkable precision, fine tune implant positioning and assess ligament balance before the final implants are inserted.
So, does that mean robotic surgery is better? The honest answer is: sometimes, but not always. Robotic assistance offers genuine advantages. Greater precision in bone preparation, improved implant alignment and better assessment of soft tissue balance are well recognised benefits. In select patients having advanced arthritis, these may contribute to lesser soft tissue releases thus providing lesser postoperative pain.
However, successful knee replacement has never depended on a single piece of technology. The final outcome is influenced by several factors: the patient’s overall health and comorbidities, grade of arthritis, bone quality, muscle strength, commitment to physiotherapy and realistic expectations. Above all, it depends on careful surgical planning and sound clinical judgement. Thus, technology can aid a surgeon but not substitute one.
On the other hand, conventional knee replacement continues to enjoy an outstanding track record. Many patients who underwent conventional surgery even twenty years ago are still walking comfortably today. It remains one of the most successful operations in modern orthopaedics, with excellent long-term results when performed well. That’s why I’m often amused when people ask whether conventional surgery has become “obsolete.” Not at all! A paintbrush did not become obsolete because someone invented Photoshop! Each has its place. The quality of the final masterpiece depends far more on the artist than on the tool.
Of course, robotic surgery has its limitations too. Robotic systems are expensive to acquire and maintain, surgical time is slightly more as compared to conventional replacements, they also require dedicated training and are not available in every hospital. More importantly, not every patient necessarily benefits from robotic assistance. Medicine is rarely about choosing the newest technology simply because it exists. It is about choosing the right treatment for the right patient. Perhaps that is the most important message I would like readers to take home.
Instead of asking, “Does this hospital have a robot?”, consider asking, “Why is this particular operation being recommended for me?” A thoughtful discussion with your surgeon is worth far more than a flashy advertisement or an internet video. Every knee is different. Every patient has different expectations. The best surgical plan is the one that is tailored to the individual, not the one that happens to be trending on social media.
Should You Choose Robotic Or Conventional Knee Replacement?
Being fellowship trained in both the sciences, I feel that there is no universal answer. If robotic assistance is likely to offer a meaningful advantage in your particular case, your surgeon should explain why. If a conventional knee replacement is equally appropriate, there is absolutely no reason to feel that you are receiving an inferior operation, as both techniques are capable of producing outstanding outcomes.
At the end of the day, patients do not remember the technology that was used. They remember whether they can walk without pain, climb stairs comfortably, return to their morning walks and enjoy time with their families once again. Whether that journey begins with conventional instruments or robotic assistance is often less important than the knowledge, judgement and experience of the surgeon guiding every step of the way. As my mentor always said: “After all, the finest instrument in the world is only as good as the hands that use it!”
Dr. Kaiwan M. Randeria is an Orthopedic Surgeon, holding a Fellowship in Joint Replacement Surgery. He aims to increase awareness about bone health, which has been adversely affected in keeping with today’s unhealthy lifestyle and nutritional issues. [Connect with him at: drkaiwan94@gmail.com ]
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