Robotic knee replacement in Singapore is a total knee replacement in which a robotic system helps your surgeon plan the operation and check it as it is carried out. At Spire Hip & Knee Centre this is done with the ROSA® Knee System.
If your knee arthritis has reached the point where stairs, kneeling and a walk to the coffee shop have all become negotiations, this page sets out what the procedure involves, who it suits, and what recovery actually looks like. Spire Hip & Knee Centre assesses and treats knee arthritis across the full range, from early joint preservation through to total knee replacement, for patients across Singapore.
Robotic knee replacement is a total knee replacement in which a robotic system assists the surgeon with planning bone cuts, positioning the implant and assessing soft tissue balance. The surgeon performs the operation and makes every clinical decision. The system provides measurement and guidance, and does not operate on its own.
The system used at our centre is the ROSA® Knee System, developed by Zimmer Biomet and introduced for knee replacement in 2019. It brings together imaging taken before the operation with measurements recorded during it, so that the plan can be checked and adjusted while the surgery is in progress. The implant itself is the same range used in a conventional total knee replacement.
The most common misconception we correct in clinic is the word “robotic” itself. Patients often picture a machine operating unsupervised. What actually happens is closer to a surveying instrument: it measures your knee continuously and holds the cutting guide where the surgeon has planned it. The surgeon makes every cut and every judgement.
Knee replacement is a treatment for symptoms, not for an X-ray. The patients we see are usually describing some combination of the following:
The single most useful thing you can bring to a consultation is not a scan. It is a specific list of what the knee is stopping you from doing. Read more about the underlying condition on our page covering knee osteoarthritis.
Spire Hip & Knee Centre assesses and manages the conditions that lead to knee replacement, including:
Wear of the joint surfaces, the most common reason for knee replacement in Singapore. See knee osteoarthritis.
Rheumatoid and other inflammatory conditions that damage the joint lining and cartilage.
Arthritis that follows an earlier knee fracture or ligament injury, often appearing decades later.
Localised loss of the joint surface, which may be treated without replacement if caught early. See knee cartilage injury.
Loss of blood supply to a segment of bone, which can collapse the joint surface. See osteonecrosis of the knee.
Bow-leg or knock-knee that concentrates load on one side of the joint.
Including a painful or loosening implant requiring revision.
Knee arthritis is common everywhere, but the pattern in our clinic has some local features worth naming.
You may be a candidate if:
A different approach may suit you better if:
Age on its own is rarely the deciding factor. General health, bone quality, the state of your ligaments and what you need the knee to do matter more. That conversation belongs in a consultation rather than on a web page.
Arrange a review if you notice:
Seek urgent medical attention if the knee becomes hot, red and acutely swollen with fever, if you cannot bear weight after an injury, or if you have sudden severe calf pain or breathlessness after surgery, as these may indicate infection, fracture or a blood clot requiring immediate care.
In our practice, the most common regret is not that surgery was done, but that it was delayed past the point of usefulness. Patients who wait until they can barely walk arrive with wasted quadriceps, a stiff knee and reduced general fitness, and every one of those makes rehabilitation harder. There is no prize for endurance here.
A point that surprises many patients: the severity on the X-ray and the severity of symptoms often do not match. We treat the patient in front of us, not the film.
The first question is never which technology to use. It is whether the whole joint needs replacing, only part of it, or none of it yet.
Most patients have already worked through some of this, but it is worth completing properly before surgery is considered. It includes weight management, activity modification, a structured physiotherapy programme focused on quadriceps and hip strength, walking aids where appropriate, analgesia used on medical advice, and injections in selected cases. A programme abandoned once the pain settles is a common reason symptoms return.
X-rays of your leg, and in some cases a CT scan, are used to build a three-dimensional model of your knee and to assess limb alignment. Your surgeon plans implant size, position and rotation before you enter theatre. Decisions that would otherwise be made under time pressure during the operation can be considered in advance.
Reference markers are attached to your femur and tibia so the system can track the position of your leg and instruments. As the knee is moved through its range, the system records alignment and the gaps between the bones in flexion and extension. Your surgeon uses this data to position the cutting guides and, where required, to adjust the plan for your ligament tension and anatomy.
The surgeon makes the bone cuts using guides held to the plan. Once trial components are in place, the system is used again to verify alignment and balance before the final implant is fixed and the wound closed.
You will usually stand and take your first steps on the day of surgery or the day after, guided by our physiotherapy and rehabilitation team. Rehabilitation continues through your inpatient stay and as an outpatient, and your surgeon will review you at intervals to check wound healing, range of motion and progress.
| Conventional Instrumentation | Computer Navigation | Robotic-Assisted (ROSA®) | Deferring Surgery | |
|---|---|---|---|---|
| Typically used for | The full range of primary knee replacements | Primary replacement, particularly with deformity | Primary replacement where detailed planning and gap data are wanted | Earlier arthritis, symptoms still controlled by non-surgical care |
| What it involves | Mechanical jigs, 2D X-ray templating, surgeon assessment | Intra-operative registration with on-screen alignment data | Pre-operative model, intra-operative registration, guides positioned to plan | Weight management, physiotherapy, analgesia, injections |
| Main advantage | Decades of registry data, shortest theatre time | Alignment feedback without a robotic arm | Plan is measured and verified through range of motion | No operation and no surgical risk |
| Main drawback | Relies more heavily on jig position and surgeon judgement | Does not hold the cutting guide | Longer set-up, additional pin sites, may need extra imaging | Arthritis is progressive, and function lost may not fully return |
| Implant used | Same implant range | Same implant range | Same implant range | Not applicable |
A fuller technique comparison is available on our page covering computer-assisted versus robotic knee replacement.
Published studies consistently report that robotic-assisted knee replacement achieves implant positioning closer to the pre-operative plan than conventional instrumentation, with fewer outliers in radiographic alignment. Several series also report lower early post-operative pain scores and shorter inpatient stays in selected groups of patients.
What the evidence does not yet establish is whether those differences translate into meaningfully better long-term function or implant survival. Follow-up in most robotic knee studies is still short compared with the decades of registry data available for conventional techniques, and patient-reported outcome scores at one and two years are similar between techniques in a number of randomised trials.
In practical terms, robotic assistance supports accuracy of execution. Your outcome will also depend on your diagnosis, your general health, the state of your soft tissues, your rehabilitation and your surgeon’s judgement.
Most patients are walking with a frame or sticks within a day of surgery, out of walking aids indoors somewhere between two and six weeks, and back to most daily activities by around three months. Strength and comfort continue to improve for a year or more. Individual recovery varies with age, fitness and other medical conditions.
An indicative timeline after knee replacement
| Stage | What to expect |
|---|---|
| Day of surgery | Standing and first steps with support, guided by physiotherapy. Pain relief, ice and elevation. |
| Days 1 to 3 | Daily physiotherapy, work on bending and straightening, walking further along the ward. Usually two to four nights in hospital. |
| Weeks 1 to 2 | Home with a frame or sticks. Wound review and clip or suture removal. Swelling is at its most obvious in this period. |
| Weeks 2 to 6 | Outpatient physiotherapy. Walking aids gradually reduced. Most patients manage stairs with a rail. Driving discussed with your surgeon. |
| Weeks 6 to 12 | Longer walking distances, stair confidence improving, return to light or desk work commonly discussed in this window. |
| Months 3 to 12 | Continued gains in strength, stamina and comfort. Residual swelling and warmth over the knee can take many months to settle. |
Three practical realities worth stating plainly. Stairs almost always take longer than level walking, so do not use them as your early progress marker. Diabetic patients and smokers heal more slowly, and stopping smoking before surgery is one of the few things entirely within your control. And the knee will feel warm and swollen for far longer than most patients expect, which is normal healing rather than a sign that something has gone wrong.
Recovery timelines vary between individuals. The figures above are typical ranges, not a promise of any particular outcome.
The kneeling point deserves emphasis, because it is rarely raised until afterwards. If floor prayer or floor sitting is part of your daily life, say so at your first consultation. It should shape the discussion.
Every option, including doing nothing, carries risk. An honest account:
Dr Ambrose Yung will discuss the risks that apply specifically to your knee and your circumstances during consultation. Written consent follows a full discussion of the alternatives.
Cost depends on the hospital and ward class, the length of stay, the implant used, the surgeon and anaesthetist fees, and whether robotic assistance is used. Robotic planning, imaging and disposables may carry an additional charge.
Typical components
MediSave and insurance. Knee replacement is claimable under MediSave up to the applicable surgical withdrawal limit set by the CPF Board, and is covered in part by MediShield Life subject to claim limits and deductibles. Integrated Shield Plan coverage depends on your policy, your ward entitlement and any pre-authorisation requirement. Any additional charge related to robotic assistance should be confirmed with your insurer before surgery. The Ministry of Health publishes fee benchmarks and typical bill sizes for knee replacement, which are a useful reference when comparing estimates.
Our clinic team can prepare a written fee estimate before anything is scheduled and can assist with insurance pre-authorisation. For a fuller breakdown, see total knee replacement surgery cost in Singapore.
If you are considering robotic knee replacement in Singapore and want a clear diagnosis and a plan you can follow, Dr Ambrose Yung and the team at Spire Hip & Knee Centre are available for consultation. You will be examined, your imaging reviewed, the options for your pattern of arthritis explained, and a written cost estimate provided if surgery is being considered.
Monday – Friday: 9.00am – 6.00 pm
Saturday: 9.00am – 1.00pm
Sunday & PH: CLOSED
Monday – Friday: 9.00am – 6.00 pm
Saturday: 9.00am – 1.00pm
Sunday & PH: CLOSED
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