With so much digital tech being added to medical treatments, it’s no wonder robotic knee replacement is becoming a popular search term for patients with knee arthritis.
Many people hear about systems such as Mako, ROSA, CORI, VELYS and NAVIO and wonder “could a robotic-assisted knee surgery be more accurate, safer or faster to recover from?”.
Bad news: there’s no simple response. The answer is balanced.
Robotic knee replacement can help with planning, bone preparation and implant positioning. It may allow the surgeon to match the knee replacement more closely to the patient’s anatomy. But it is still surgeon-led surgery, and the robot does not replace clinical judgement, experience or rehabilitation.
“Robotic knee replacement” uses digital planning and robotic or navigation technology to support the surgeon during the operation.
Depending on the system, this may involve:
With all of this, a surgeon remains in control throughout. The robotic system does not decide what operation you need or perform the surgery independently.
Manual knee replacement is the conventional approach. The surgeon uses X-rays, instruments, anatomical landmarks and experience to remove damaged bone and cartilage, shape the joint and place the implant.
Conventional knee replacement can produce excellent results, especially in experienced hands. Robotic systems add another layer of measurement and guidance, but they do not remove the need for a skilled surgeon.
Long-term data also supports the quality of conventional knee replacement. A major 2019 systematic review and meta-analysis published in The Lancet1 found that around 82% of total knee replacements were still lasting at 25 years, based on pooled registry data.
At Orthopaedic Innovation, the team explores non-surgical options before considering knee replacement; including advanced injections where appropriate.
If surgery is needed, the focus is on selecting the right procedure for the patient. Manually, our surgeons perform total knee replacement or partial knee replacement, depending on the joint.
You can read about the procedures in our blogs:
The Columbus Knee System: Advanced Total Knee Replacement for Long-Term Results
The Oxford Partial Knee System: A Breakthrough in Knee Arthritis Treatment
Our knee replacement pathway also includes:
The key point is that technology is only one part of successful knee replacement. Implant accuracy matters, but so do diagnosis, surgical technique, implant choice, rehabilitation and support after surgery.
New tech. New digital techniques. What are we actually gaining here?
Precision looks to be the real winner. Robotic systems may help with:
Research generally supports robotic knee replacement as a precision tool.
A 2025 systematic review and meta-analysis published in Arthroplasty2 (“Robotic-assisted versus conventional total knee arthroplasty: a systematic review and meta-analysis”) found that robotic-assisted total knee arthroplasty improved mechanical alignment accuracy compared with conventional total knee replacement, but did not show clearly superior short- to medium-term functional outcomes.
A 2024 systematic review published in Journal of Robotic Surgery3 (“Comparison of robotic-assisted total knee arthroplasty: a systematic review”) also reported improved mechanical alignment and component-positioning accuracy compared with conventional surgery.
So…the evidence supports improved accuracy. Whether that translates into a better patient experience depends on the patient, surgeon, implant, knee alignment strategy and rehabilitation pathway.
Better precision doesn’t necessarily equal better surgery. Possible disadvantages include:
Robotic technology can help plan and guide surgery, but it cannot guarantee less pain, faster recovery or a more natural-feeling knee.
One misconception is that “robotic” means minimally invasive: that is not always true. The incision, tissue handling, swelling, pain control and physiotherapy plan still matter.
Again: not automatically. Robotics may improve accuracy, but recovery after knee replacement is affected by many factors like pre-operative stiffness, muscle strength, swelling, pain control, surgical technique, implant balance, physiotherapy, general health and home support.
It’s worth noting this is especially important in knee replacement because recovery often depends on regaining bend, straightening the knee fully and restoring muscle control.
| Robotic knee replacement | Manual knee replacement |
|---|---|
| Uses digital planning, navigation or robotic assistance | Uses instruments, imaging, anatomical landmarks and surgeon experience |
| Can improve accuracy of bone cuts and implant positioning | Can produce excellent results in experienced hands |
| May help personalise alignment and joint balance | Accuracy depends heavily on surgeon technique and planning |
| May involve extra imaging, mapping or equipment | Usually does not require robotic equipment |
| Does not guarantee faster recovery on its own | Recovery depends on surgery, rehabilitation and patient factors |
| Long-term evidence is still developing | Long-established procedure with extensive outcome data |
We call long-term durability "survivorship" and it’s one of the most common questions for patients.
The theory behind robotic knee replacement is that improved alignment and implant positioning may reduce uneven loading, wear and early failure. In principle, this could support longer implant survival.
That being said, long-term evidence is still developing. NICE4 notes that ongoing studies, including RACER-Knee, are investigating clinical and cost-effectiveness over longer follow-up periods, with RACER-Knee anticipated to run until 2032.
Simple claims that robotic knee replacement is always “better” or “longer lasting” should always be questioned as there are so many factors at play.
It may improve technical accuracy, but long-term success also depends on implant choice, patient factors, surgical judgement and rehabilitation.
If you are considering robotic-assisted knee replacement, useful questions include:
Robotic knee replacement can be useful when it improves planning, alignment and implant positioning. But it does not guarantee the best result on its own.
Good outcomes still depend on the right diagnosis, experienced surgery, implant choice, soft-tissue balance and rehabilitation.
The key question is not simply “robot or manual?” It is: “Which approach gives me the best chance of a stable, comfortable knee and a confident return to everyday movement?”
Book your free discovery call with one of our specialists to understand which approach is right for your knee.
1https://pmc.ncbi.nlm.nih.gov/articles/PMC6381229/
2https://pmc.ncbi.nlm.nih.gov/articles/PMC11918693/
3https://link.springer.com/article/10.1007/s11701-024-02045-y
