Both surgeries replace the worn knee joint with an implant. In conventional surgery the cuts are made by eye and feel; in robotic surgery a CT scan becomes a personalised 3D plan with implant size, angle, and rotation chosen for your specific knee, and a robotic arm assists Dr Ramneek to make each bone cut to that plan. The implant is the same; the precision of how it is placed differs.
Robotic Knee Replacement
Robotic-assisted knee replacement at Max SMART Saket using MAKO precision. 2,000+ robotic procedures done.
Max SMART Saket
Mahajan's GK-1
In our practice at Max SMART Saket, robotic-assisted knee replacement is the same operation we do conventionally - we replace a worn-out knee joint with a new metal-and-polymer implant, you walk with a frame within 2 hours, go home by Day 1, and are back to routine activity within a month.
What changes is the precision of the cut. A CT scan made before surgery becomes a 3D plan of your specific knee. During surgery, the MAKO robotic arm guides each bone cut within a haptic safety boundary - I stay in full control; the arm just prevents the cut from straying. Studies report fewer alignment outliers than manual instrumentation. For most straightforward knees, conventional works just as well. Robotic earns its place when your anatomy is unusual, when you have had prior knee surgery, when there is significant deformity, or when you are younger and small precision differences will matter over decades.
Same knee. See why precision changes the outcome.
Who is an ideal patient for robotic knee replacement
The ideal candidate is the same adult who would benefit from total knee replacement - knee pain stops them from doing what they want to do, and conservative treatment (medicines, physiotherapy, weight loss) has been tried and has stopped helping.
The robotic approach is most useful in four situations, in addition to the standard candidacy:
Bone anatomy that varies from the norm - significant deformity (varus or valgus), or an unusual joint shape that makes manual alignment harder.
Prior knee surgery - earlier procedures (ligament repair, osteotomy, partial replacement) can shift bony landmarks; a CT-scan-based 3D plan reads what is actually there rather than relying on standard jigs.
Younger or more active patients - small precision differences add up over decades of wear; better alignment may extend implant life.
Patient preference - some patients value the precision of a pre-planned cut and the haptic safety boundary, and that is a legitimate reason to choose the robotic path.
The robotic approach is not always the right answer. For most straightforward knee replacements with standard anatomy, conventional surgery without the robot works just as well. Cost, surgery duration, or your own preference can point either way - we discuss this with you in consultation.
Bring your X-rays or MRI, a list of medicines you have tried, and a sense of which daily activities you have stopped doing - we discuss your specific case in consultation before any recommendation.
Real outcomes from real patients
These videos are published on Max Healthcare's official YouTube channel. Each patient's experience is unique - outcomes depend on individual health, disease characteristics, and clinical factors. These accounts are not a guarantee of results.
Meet Your Surgeon
How long is the hospital stay?
Robotic knee replacement does not change the hospital stay - most patients still go home in 1 or 2 nights, the same as conventional knee replacement. The robot changes what happens inside the operating theatre - the bone cuts, the soft-tissue handling, the precision of the fit. It does not change the recovery ward, the physiotherapy briefing, or the discharge criteria.
Day 0 (surgery day)
You arrive in the morning, the CT-based plan is loaded, and surgery happens. The rest of the day is post-operative observation - pain monitoring, vital signs, IV fluids, gentle limb positioning. Mobilisation begins after 2 hours of recovery if anaesthesia and vitals allow - bedside sitting, chair sitting, commode use, posture changes. Light food and water typically restart by evening.
Day 1 (next morning)
Walking with a frame, a structured physiotherapy briefing covering the home exercises and the Rule of 20 protocol, and discharge if vitals and mobilisation are stable. Patients having a single knee replaced typically go home this day. Patients having both knees done in the same admission typically go home the day after.
What the robot may shift
Less soft-tissue handling during surgery can mean a smoother first 24 to 48 hours - quieter swelling, easier early physiotherapy. This is what our physiotherapy team has reported across our MAKO cases. The discharge timeline itself does not move; the experience of those nights often does.
Going home
Discharge readiness comes down to three checks - pain controlled on oral medication, vitals stable, and confident walking with a frame for short indoor distances. Every patient goes home with 7 to 8 contact numbers - covering doctors, physiotherapist, dieticians, emergency services, and administrative staff - so nobody feels alone in the recovery.
What does recovery actually look like
Every patient goes home with 7 to 8 contact numbers - covering doctors, physiotherapist, dieticians, emergency services, and administrative staff. Nobody feels alone in the recovery.
Recovery has milestones at Day 1, Week 1, and Month 1 - here is what "normal" looks like at each one.
Day 1: you walk within 2 hours of surgery. We start small - bedside sitting, then chair sitting, then commode use the same day. The moment you stand and take a few steps with a frame is the moment recovery shifts gears.
Week 1: walking with a single cane or stick at home. Short walks outside are encouraged. The daily-living chores start coming back - making your own tea, sitting at the dining table, on the balcony, reading, watching TV.
Some of our patients drop in to the office or shop for a few hours just to break the monotony.
Month 1: routine social life. Park walks, cycling, weddings, family gatherings. We target approximately 4,000 steps a day - a goal to work toward, individualised by how you feel.
The Rule of 20
What holds it all together is our Rule of 20: 20 minutes of activity, 20 minutes of icing, 20 minutes of rest, repeated through your waking hours, in hospital and at home. Diet is part of the protocol too - small frequent meals, protein-rich, adequate hydration, individualised with our dieticians.
Signs that suggest Robotic Knee Replacement may be right
The signs that point toward needing a knee replacement are the same whether the surgery is conventional, robotic, or partial - the technology comes after the decision, not before. Any one of these being a "no" usually means we work on that piece first.
Signs that suggest a knee replacement may be the right path:
- Daily knee pain that does not improve with rest, weight loss, ice, or a long-enough course of physiotherapy.
- Stiffness or swelling that limits walking, stairs, or sleep.
- X-ray or MRI showing advanced osteoarthritis (Grade 3 or 4 on standard grading).
- Conservative treatments ineffective - medicines, injections, physiotherapy - no longer providing meaningful relief.
If most of these apply to you, the next step is talking to a knee specialist - first about whether surgery is right, then about whether the robotic approach is the right fit for your knee. Earlier evaluation is better than later - surgery is often less complex when arthritis is moderate rather than end-stage. We discuss your specific case in consultation before any recommendation.
When robotic is the right choice - and when it is not
You have landed on this page looking at robotic knee replacement. The honest answer is that the robot is one of three tools we use - it is the right one for some knees and not for others. Here is how the choice actually gets made.
When robotic earns its place.
Knee anatomy that varies from the textbook - significant varus or valgus deformity, an unusual joint shape, or bony landmarks that make manual jigs less reliable.
Prior knee surgery - ligament repair, osteotomy, partial replacement - that has shifted the landmarks an open instrument would normally read.
Younger or more active patients, where small precision differences add up over decades of wear.
Patient preference for a CT-planned, haptic-bounded cut, made after a 3D model of your specific knee.
When conventional knee replacement is the right answer instead.
Most straightforward end-stage osteoarthritis with standard anatomy - the manual approach has decades of long-term outcome data and gives equally good results in these knees.
When cost or surgery duration matter to your decision - the robotic workflow adds CT scanning, registration, and operating-theatre time.
When partial knee replacement (UKA) is the right answer instead.
Arthritis limited to one compartment, intact ligaments, no significant deformity. The unworn parts of your knee stay.
10-year survivorship of well-selected modern UKA designs is around 94%.
How we decide together. The conversation begins with your imaging - X-ray, sometimes MRI, and a CT scan if we are seriously considering the robotic path. We examine your knee, walk through what each option does and does not change, and the recommendation comes after that exam - not before. The technology is chosen for the knee, not the other way around.
What happens during the surgery itself
Same knee. See why precision changes the outcome.
Robotic knee replacement typically takes 60-90 minutes per knee - similar to conventional TKR, though Step 3 differs in how the bone cuts are made. Here is the broad sequence - without the graphic detail.
Step 1 • Pre-op CT scan + 3D plan.
Before surgery, a CT scan of your knee is taken. The MAKO software builds a 3D model of your specific joint, and the surgeon plans every bone cut - angle, depth, position - in detail. The plan is reviewed before you enter the operating theatre.
Step 2 • Anaesthesia, incision, and access.
Anaesthesia (usually spinal with sedation) is set up. A 6-8 inch vertical incision is made down the front of the knee. The surgeon reaches the joint via a standard medial parapatellar approach - the kneecap is gently moved to the side, not cut.
Step 3 • Robotic-arm-guided bone preparation.
This is the part that differs from conventional TKR. The robotic arm is registered to your knee with reference pins, so it knows exactly where your bones are in three dimensions. The surgeon makes the bone cuts using the arm - but the arm holds a haptic safety boundary defined by the pre-op plan. Within the plan, the surgeon has full control; outside it, the arm physically resists. The cut cannot stray.
Step 4 • Implant fitting.
The new Stryker Triathlon implant is fitted in three parts - femoral component, tibial component, and a polyethylene insert that acts as the new cartilage. The kneecap is resurfaced if clinically needed.
Step 5 • Balance check and closure.
Once balance and tracking are verified through full range of motion, the layers are closed. You move to recovery.
Specifics - incision style, implant choice, whether the kneecap is resurfaced - are decided in consultation based on your imaging and exam.
The implant we put in • how precisely it gets placed
Two things shape the outcome of a knee replacement - the implant we put in, and how precisely it gets placed.
The implant. We use internationally accepted, US FDA-approved implant systems with a well-proven track record in published literature and joint registry data. The metal part uses cobalt-chromium, the same alloy that has been standard in knee replacements for decades. The plastic part - which acts as the new cartilage between the bones - uses a modern, vitamin-E-treated polyethylene that wears down much more slowly than older versions.
When we use it: for most primary knee replacements at our practice. The systems we use have decades of long-term data behind them.
Precision - robotic assistance. Before surgery, a CT scan of your knee becomes a 3D plan. During surgery, a robotic arm guides each bone cut to match that plan exactly. The surgeon stays in full control; the arm just prevents the cut from straying. Studies show this approach reduces alignment errors compared to traditional surgery.
When we use it: when your knee anatomy is unusual, you have had prior knee surgery, or there is significant deformity - and for younger patients where small precision differences add up over decades of wear. Our experience is across more than 2,000 robotic-assisted joint replacements on our primary robotic platform, and around 100 more on a second platform, layered on more than 12,000 knee surgeries overall.
When robotics is not the right fit. For most straightforward knee replacements with standard anatomy, traditional surgery without the robot works just as well. Cost, surgery duration, or your own preference can point either way - we discuss this with you upfront.
The right choice is one that fits your knee, your situation, and your preferences. We talk through all of it with you in consultation.
Every surgery carries risk - we discuss yours
Every surgery carries risk. Robotic knee replacement carries the same risks as a conventional knee replacement plus a small set of robotic-specific considerations. We talk through these openly in consultation - honest discussion is part of how informed consent works.
Infection.
Reported in roughly 1-2% of total knee replacements in modern operating theatres - the rate does not change with the robotic approach. Risk is higher with poorly-controlled diabetes, obesity, smoking, or pre-existing skin conditions. We screen and optimise these before surgery; a sterile OR setup, prophylactic antibiotics, and meticulous wound closure further reduce risk.
Blood clots - DVT and pulmonary embolism.
A DVT (Deep Vein Thrombosis) is a blood clot that can form in a leg vein after major surgery, when movement is limited. Rarely, that clot breaks loose and travels to the lung - a pulmonary embolism, which is the dangerous version of the same problem. We mitigate both through early mobilisation (most patients walk with a frame within 2 hours of surgery), blood thinners during admission, and compression devices.
Stiffness or restricted range of motion.
Some patients heal with less flexion than they had before surgery. Pre-op physio + structured post-op rehab + our Rule of 20 protocol minimise this. If stiffness develops, manipulation under anaesthesia can usually recover function.
Wound healing problems.
Higher in smokers, patients on long-term steroids, and those with significant comorbidities. Smoking cessation 4-6 weeks before surgery materially reduces risk.
Implant longevity and revision.
Published literature puts modern implant survivorship at around 20 years and beyond in most patient profiles. Dr. Ramneek Mahajan has been operating since 2003, and patients from those early years are still doing well at 23 years. Revision surgery - replacing a worn or loose implant - is a recognised care pathway, not a failure. We follow you long-term so this gets caught early.
Robotic-specific considerations.
Four things are worth knowing about the robotic approach itself, separate from the general risks above.
Tracking-pin sites. The robotic arm needs small tracking pins fixed into the femur and tibia so it knows where your bones are in three dimensions. These pin sites can occasionally be tender for a few days and, very rarely, become a site of fracture through the pinhole. We place the pins carefully and away from load-bearing zones to minimise this.
Conversion to the manual technique. If something during surgery makes the robotic plan unsuitable - registration not matching, an unexpected finding on the bone - we complete the case using the manual approach. This is uncommon, but it is the safety valve and you will know about it before the case begins.
Computer navigation as a back-up. Where the robotic plan cannot be used, we can still work to a navigated plan rather than by eye alone. We are among the very few hospitals in India, and worldwide, that still use computer navigation in selected cases.
Longer surgery time and cost. A robotic case adds CT scanning before surgery and 20-30 minutes of registration and planning inside the theatre. The total cost is also higher than a conventional knee replacement. For straightforward knees this trade-off does not change the result; for the cases where robotic earns its place, the trade-off is worth it.
Your personal risk profile depends on age, comorbidities, lifestyle, and bone quality. We discuss your specific picture in consultation before any recommendation.
Frequently Asked Questions (FAQs)
Can I safely wait?
The questions worth asking before you decide - and when waiting is the right call, and when it is not.
Before we meet
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What should I expect, step by step?
The whole path, stage by stage - getting ready, the day itself, recovery, physio, life after.
Patient journey
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Where did he train?
Fellowships, years in practice, and international experience
Credentials and experience
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