Introduction
Knee care · Knee arthritis
Total knee replacement surgery: when it’s considered, what to expect and recovery
Dr Sean LeoOrthopaedic Surgeon, Singapore
Clinic enquiries · Not an emergency service
Illustrative image
At a glance
At a glance
At a glance: when is total knee replacement considered?
Total knee replacement is considered when knee arthritis causes persistent pain and loss of function despite non-surgical treatment. It is a shared decision reached after a proper assessment, not an automatic next step.
The decision to offer surgery rests on a clinical judgement about the overall impact on your life. End-stage arthritis is a clinical judgement, not a fixed X-ray grade [1][9].
What’s covered on this webpage
Follow the route in order, or jump to the stop you need. Stops you have read are marked.
What is total knee replacement?
What is total knee replacement?
What is total knee replacement?
Total knee replacement — also called total knee arthroplasty — replaces the worn surfaces of both sides of the knee joint with an artificial implant. It is offered when arthritis has worn the joint’s bearing surfaces enough that pain and stiffness limit everyday life, and non-surgical treatment has not helped enough.
Arthritis gradually wears away the smooth surfaces that let the knee move easily. As the protective covering thins, the joint becomes painful and stiff. A total knee replacement removes only these worn surfaces, not the whole knee, and covers the ends of the thigh bone (femur) and shin bone (tibia) with an artificial implant. The kneecap (patella) surface may or may not be resurfaced as part of the operation [6]. At a high level, the implant is made of metal and plastic [6].
Expandable detail — what the implant components do
The implant takes over the job of the worn cartilage, providing a smooth, low-friction surface for the knee to move against.
- Metal parts cap the ends of the thigh bone and shin bone, replacing the worn joint surfaces.
- A plastic insert sits between the metal parts, acting as the new bearing surface so the two metal components move smoothly against each other.
- The kneecap surface may be replaced with a plastic button where its underside is worn. Whether this is done is a decision made during your operation, based on what is found.
The implant is not a single standard part fitted identically to everyone. It is sized and positioned to suit your knee, and your surgeon will discuss the options with you as part of your care [6].
It is a common misunderstanding that the whole knee is removed and replaced. Only the worn joint surfaces are replaced, and the implant is chosen and sized to match each person rather than being identical for everyone.
Video · Dr Sean Leo
Total Knee Replacement: The Updated Reality
- Why many people's picture of knee replacement is out of date
- How the modern procedure differs – precision and tissue preservation
How knee arthritis develops and what it feels like
How knee arthritis develops and what it feels like
How knee arthritis develops and what it feels like
Knee arthritis (osteoarthritis) is a gradual wearing of the smooth surfaces that let the knee move easily. As the protective covering thins, the joint becomes painful and stiff.
What people notice is persistent knee pain and stiffness that limit everyday life, along with a loss of function. Not every painful knee needs a replacement, and many knees are managed well without surgery.
“End-stage” describes the point at which pain and loss of function continue despite non-surgical treatment and materially reduce quality of life. It is a clinical judgement, not a fixed X-ray grade [1][9].
Video · Dr Sean Leo
Understanding Knee Wear and Tear (Osteoarthritis)
- What knee osteoarthritis is and how it can feel
- Common symptom patterns, including activity-related pain and morning stiffness
- How non-surgical options are usually tried first
When is knee replacement considered
When is knee replacement considered
When is knee replacement considered? The assessment in detail
Knee replacement is usually considered when knee pain and loss of function persist despite adequate non-surgical care, and the effect on quality of life has become material. By this point, most people will have tried a combination of pain relief, physiotherapy, and lifestyle or weight measures without enough lasting benefit [1][2][9]. Surgery is not a first resort; it is offered when these simpler treatments are no longer managing the problem [1][2].
Inflammatory arthritis — such as rheumatoid arthritis — can also lead to a total knee replacement. This group carries a higher risk of infection and other complications than osteoarthritis, which is relevant context for the discussion rather than a reason to avoid surgery. Individual risk is always assessed clinically [13].
Whether surgery is right for you is a decision made together with your clinician, with balanced information about the benefits, the risks, and what to expect. Shared decision-making is a required part of care, not an optional extra [1].
It is important to be clear about what the threshold is — and is not. End-stage arthritis is a clinical judgement, not a fixed X-ray grade, and there is no single pain score that automatically triggers surgery [1][9]. Not every painful knee needs a replacement. Many knees are managed well without surgery, and the assessment exists to work out which path fits your situation.
Expandable detail — what assessment usually covers
An assessment for knee replacement typically brings together several parts:
- Your history — how the knee problem started, how it affects you, and how it has responded to treatment so far.
- Examination — how the knee moves, where it hurts, and how stable and strong it is.
- Imaging — an X-ray (and sometimes other scans) to look at the joint surfaces. This is one part of the picture, not a standalone trigger for surgery.
- Quality-of-life impact — how pain and stiffness affect walking, sleeping, work and everyday activities.
- What has already been tried — the non-surgical measures you have used and how much they helped.
The aim is to build a full picture of your knee and your life, so that any recommendation about surgery is made with you rather than for you [1].
Non-operative options to try first
Non-operative options to try first
Non-operative options to try first
Before knee replacement is considered, non-surgical treatment comes first. These measures are genuine treatment in their own right, not simply a delay — and for many knees they are enough. A large number of knees with arthritis are managed well without surgery [2][7].
The options your clinician is likely to discuss include:
- Pain relief and medication — simple analgesia and other medicines to help with day-to-day pain and stiffness.
- Physiotherapy and exercise — a structured programme to strengthen the muscles around the knee and keep the joint moving.
- Weight management — reducing load through the knee where body weight is a factor.
- Activity modification — finding ways to stay active while easing strain on the joint.
- Injections, where appropriate — an option some knees benefit from, discussed on its own merits [2][7].
What conservative care can achieve is meaningful but not unlimited. It can reduce pain, improve function and help you stay active, which is exactly why it comes first. What it cannot do is regrow cartilage or heal the worn surfaces of end-stage arthritis. When these measures have been given a fair trial and pain and loss of function continue to affect your quality of life, that is the point at which a conversation about surgery becomes appropriate [2].
Preparing before surgery
If surgery does become the plan, preparation starts before admission rather than after. Advice on exercise, weight management, diet and stopping smoking is offered when you are listed for surgery, because a body that is as strong and well as possible tends to cope better with the operation and the rehabilitation that follows [1][6].
This is best understood as optimisation — supporting your preparation and recovery — rather than a promise of a particular result. It is part of good care, not a guarantee of the outcome [1].
Expandable detail — where to read more
For more depth on the non-operative route, see our articles on osteoarthritis and injections, and on weight management for knee arthritis. The knee hub also outlines the wider range of knee conditions and treatments.
Structure / Patient / Goal
Structure / Patient / Goal
Deciding together
Structure / Patient / Goal: deciding what matters
The decision is organised around three questions: the structure, the patient and the goal. They are worth separating, because no scan, score or age on its own can answer all three.
S
Structure: what the joint damage actually is
This covers how far the arthritis has progressed, which compartments of the knee are affected, and whether the wear is confined to one compartment or spread across the joint — the distinction between a partial and a total replacement described later on this page. Structure is what the assessment, the examination and the X-ray add, and it is only one part of the picture.
P
Patient: who you are and what you can carry
Your general health, other medical conditions, activity level, and your tolerance for the risks of surgery and the months of recovery it involves all shape which option is reasonable, as do practical constraints such as work and family. These are not things an X-ray can answer.
G
Goal: what you want to return to
Whether the aim is comfortable daily walking, work, recreation or sport changes what a useful outcome looks like, and how much recovery time is worth investing to get there.
Your plan
Together, Structure / Patient / Goal gives the conversation its shape: the threshold for surgery is weighed across all three, and the recommendation that follows is made with you rather than for you [1].
Total versus partial knee replacement
Total versus partial knee replacement
Total versus partial knee replacement
Knee replacement is not one operation for everyone. The right procedure depends on which parts of your knee are worn, so this is a suitability question rather than a simple “better or worse” comparison.
A partial (unicompartmental) knee replacement replaces only the one compartment of the joint that is worn away, preserving the healthy parts of the knee. A total knee replacement replaces the worn joint surfaces across the whole knee [8]. Neither option is inherently superior — each suits a different picture of arthritis.
The trade-off is real and worth understanding in neutral terms. Partial replacement can offer better short-term function and a more natural-feeling knee for the right candidate, but the long-term revision rate may be higher. In the UK National Joint Registry’s 2024 report, the best-performing partial implants — cemented fixed-bearing unicompartmental brands — had a revision rate of approximately 5.3% at 10 years, compared with 3.11% at 10 years for total knee replacement overall (4.20% at 15 years) [8][11]. These two figures are not a like-for-like comparison: the partial-replacement figure describes the best-performing implant subset, while the total-replacement figure covers all implants in the registry. Both vary by implant brand, patient selection and surgical factors, and they are population figures drawn from registry reporting.
Where both a partial and a total replacement are clinically suitable, the choice is offered to you and is made together with your surgeon — it is a shared decision, not something decided for you [6]. Suitability is determined during your clinical assessment and depends on factors such as which compartment is affected, the stability of the knee, and the pattern of arthritis. This page does not determine which option applies to you; that is a matter for your assessment.
| Partial (unicompartmental) | Total | |
|---|---|---|
| What is replaced | One worn compartment of the knee | The worn joint surfaces of the whole knee |
| Typical candidate picture | Arthritis confined to one compartment, with the rest of the knee intact | Widespread wear across the knee joint |
| Short-term function | Can offer better short-term function for suitable patients | Good function, with a fuller recovery period |
| Long-term revision | May be higher — around 5.3% at 10 years for the best-performing cemented fixed-bearing implants (NJR 2024) | Around 3.11% at 10 years (all implants, NJR 2024) |
- Partial knee replacement page — for procedure depth and what partial replacement involves.
- Partial vs total comparison article — for the narrower, detailed comparison of the two options.
What happens during knee replacement surgery
What happens during knee replacement surgery
The operation
What happens during knee replacement surgery
Knowing the shape of the day ahead can take much of the uncertainty out of surgery. What follows is a plain-language walkthrough of the main stages, so you have a steady picture of what to expect.
Before admission
In the weeks before surgery you will have an evaluation and any needed optimisation — checking your general health, reviewing medicines, and putting in place the preparation advice on exercise, weight, diet and smoking that supports your recovery [1][3]. This is the same preparation stage described above, now made specific to your operation.
The day of surgery
On the day, part of your care involves talking through anaesthesia with your team. The choice of anaesthetic is a decision made together, not a fixed rule — your team will explain the options and what each involves [3].
The operation in plain terms
Knee replacement does not remove the whole knee. It resurfaces the worn bearing surfaces of the joint — the damaged ends of the bone — with an artificial implant, so the joint can move smoothly again. Resurfacing of the kneecap (patella) may be included as part of the operation, depending on your individual situation [6].
The first hours after
Recovery does not wait until you go home. Getting moving again — mobilisation — typically begins within hours of surgery, with support from the team to start you on your feet early [1][6].
The hospital stay
Most people stay in hospital for a few nights after knee replacement. The length of stay varies from person to person and between services, so there is no single universal number to quote, and no fixed hour by which everyone is discharged [1]. Your team will guide you on what is right for you.
Expandable detail — the anaesthesia and implant discussions
Two decisions are made with you rather than for you. The first is anaesthesia — the options are explained and chosen together with your team [3]. The second is the implant choice, which is discussed alongside the risks, benefits and what to expect as part of shared decision-making [1]. Both are conversations, and you should feel able to ask questions until the options are clear.
Recovery
Recovery
Recovery
Recovery: what to expect at each stage
Recovery after knee replacement is active, not passive. It begins within hours of surgery and continues in phases over many months. The milestones below are population-typical and vary widely between individuals — timelines like these are not personal promises, and a slower pace is not a sign that something has gone wrong. The phase descriptions in this section are general service descriptions rather than cited clinical figures; individual rehabilitation programmes vary between services and between patients.
The first hours and days
Mobilisation and structured rehabilitation begin early — typically within hours of surgery — rather than waiting until you go home [1][6]. In the first days the aim is to get the knee moving safely: you will usually walk with a walking aid to begin with, progressing toward independent walking as your strength and confidence allow [1]. Pain and swelling are normal at this stage and are managed as part of your care.
Weeks 1 to 2
Rehabilitation continues with structured exercises and a gradual increase in walking. Many people move from two aids to one, or from an aid to unaided walking, during this window — but the pace is individual, and there is no requirement to hit any of these markers by a set date.
Weeks 2 to 6
Strength, range of movement and day-to-day mobility continue to improve. You are typically walking further and beginning to resume ordinary routines, with the knee feeling progressively more stable.
Months 3 to 6
For most people, the bulk of day-to-day function returns within the first two to three months [1]. By this stage many people are walking independently, managing stairs and returning to work and light daily activity, though endurance and strength continue to build for some time after.
Long term
Full recovery commonly takes up to a year or more [1]. The knee may keep improving in subtle ways well beyond the first six months — in strength, comfort and confidence — so the twelve-month-plus horizon is a normal expectation, not a sign of a problem.
Returning to driving
Resuming driving is an individual-clearance decision, not a fixed date on a calendar. In one prospective study of 156 patients, the median time to return to driving was about 18 days, with the middle half of patients returning between 12 and 27 days [12] — but this is a single study’s population figure, not a rule for you. The decision is tied to stopping sedating pain medication and being able to control the car safely, including performing an emergency stop. Your surgeon or rehabilitation team will advise when it is appropriate for you personally.
Travel and stairs
Travel and stairs are best treated as milestone-based rather than date-based goals. You are ready to progress when you can move safely and comfortably, not when a particular week has passed. Approach each one gradually and with your rehabilitation team’s guidance.
In all of this, remember that recovery timelines are population-typical, vary widely between individuals, and are not personal promises. Progress at your own pace; steady, consistent effort matters more than speed.
Risks and complications
Risks and complications
Risks and complications
Knee replacement is a major operation, and like any major operation it carries real risks. Knowing what they are — and how common they are — is part of making a settled decision. The picture below is deliberately plain: most people come through surgery well, but not everyone does, and the risks listed here are the ones you and your surgeon will discuss before you go ahead.
Infection around the implant
Infection affecting the new joint (called periprosthetic joint infection) is uncommon — reported in roughly 1 in 100 patients (about 1%), with published rates varying from under 0.5% to about 2% depending on the population studied and length of follow-up [15]. When it does occur it is serious and usually needs further treatment, which can include further surgery. Your surgical team takes specific steps to reduce the chance of infection, and this risk is one your surgeon will talk through with you directly [5].
Blood clots (DVT and PE)
A blood clot in the leg (deep vein thrombosis, or DVT) — or one that travels to the lungs (pulmonary embolism, or PE) — is a recognised risk after knee replacement. It is a real risk, but it is reduced by preventive measures (called prophylaxis), which are a standard part of care after this operation. This may include medication, compression, and early movement, and your team will explain what applies to you [4].
Loosening and wear of the implant
Over many years, an implant can loosen where it meets the bone, or its bearing surfaces can wear. This is the leading long-term reason a knee replacement eventually needs further surgery, with infection the next most common cause [9]. This ordering is a long-term, population-level pattern rather than an immediate concern in the early weeks.
Stiffness
Some people find the knee does not bend or straighten as fully as they hoped after surgery. Stiffness can usually be improved with physiotherapy, though in a minority of cases it may need further treatment.
Nerve or blood-vessel injury
Injury to a nerve or a blood vessel near the knee is uncommon, but it is a recognised risk of the operation and is something your surgeon will discuss with you.
Persistent pain
A minority of patients continue to have pain, or a poor overall result, after knee replacement. This is stated plainly because it is the honest picture — most patients improve, but a small proportion do not, and no individual result can be promised in advance [9].
Revision surgery
Sometimes a knee replacement needs a further operation later in life, whether for loosening, infection, pain, or instability. Revision surgery is not routine, but it is a real possibility that is part of the honest long-term picture [11].
Inflammatory arthritis and infection risk
For people whose knee replacement follows inflammatory arthritis (such as rheumatoid arthritis) rather than osteoarthritis, the risk of infection is higher. This does not mean surgery is not offered — it means your individual risk is assessed clinically, and discussed with you, before you go ahead [13].
Most, but not all, patients improve after knee replacement.
How long does a knee replacement last
How long does a knee replacement last
How long does a knee replacement last?
Most knee replacements last a long time. Pooled data from 14 national joint registries found that 82.3% of total knee replacements were still functioning at 25 years (95% confidence interval 81.3–83.2) — in round terms, around eight in ten [10].
The mirror image of that figure is the revision rate. In the UK National Joint Registry’s 2024 report, 3.11% of total knee replacements had been revised within 10 years, and 4.20% within 15 years [11]. In other words, revision is uncommon, but it is not rare.
It helps to be clear about what “survival” actually means in these figures. It is a population measure: it means the implant is still in place and functioning in that proportion of a large group of people, not a guarantee about any one person’s knee. An individual implant may last longer, or less long, than the average — and these registry figures are drawn from national patient populations, not from any single clinic.
When an implant does need replacing later, the main reasons are loosening, infection, pain, and instability [9][11]. Understanding these helps set an honest expectation: a knee replacement is generally a long-lasting solution, but it is a mechanical part, and a small proportion of implants will eventually need further surgery.
Does knee replacement work?
Does knee replacement work?
Does knee replacement work?
For most people, yes. Most patients experience substantial pain reduction and meaningful improvement in function after knee replacement [9].
That improvement shows up in measured quality of life, not just in how people feel day to day. In the Knee Arthroplasty Trial, quality-of-life scores (measured with the EQ-5D) rose from 0.39 before surgery to 0.71 at one year [9]. That is a large, documented gain for the group as a whole.
It is equally important to say what this does not mean. A minority of patients have persistent pain or a poor outcome, and no individual result is guaranteed. “Most patients improve” is not the same as “every patient improves,” and the figures above describe groups, not a promise about your own knee [9].
Knee replacement works well for most people. The decision is still made with a clear understanding that results vary from person to person.
Robotic-assisted knee replacement
Robotic-assisted knee replacement
Robotic-assisted knee replacement: what the evidence shows
Robotic assistance is a technique that supports the precision of certain steps of a knee replacement, such as alignment and bone preparation. It is one of several ways the procedure can be carried out, not a separate operation.
The evidence position is honest and measured: a major clinical practice guideline found no significant short-term difference in function, outcomes, or complications between robotic-assisted and conventional total knee replacement, and long-term superiority has not been established [8].
What this means for you is straightforward. Robotic assistance is a technique option whose availability varies, and it has not been shown to produce better results or a longer-lasting implant. Whether it is appropriate for your knee is something to weigh in the surgical discussion with your care team — it is not a premium outcome promise. For patients who had previous fractures or injuries affecting their lower limbs, where conventional means of applying the cutting guides are difficult due to limitations of alignment assessment, robotic-assisted surgery can help make the bone cuts and alignment possible where those conventional guides cannot be used — a technical advantage in difficult anatomy, not evidence of a better result or a longer-lasting implant [14].
With you through the seasonsMeet Dr Sean Leo
Meet Dr Sean Leo
A consultant orthopaedic surgeon whose clinical focus is the knee, sports injuries and the lower limb.
- Dr Sean Leo is a consultant orthopaedic surgeon. OrthoKinetics is his professional brand; clinical services are provided through OrthoSports Orthopaedic & Sports Surgery at Mount Elizabeth Novena Specialist Centre and Connexion, Farrer Park Hospital.
- His clinical interests include sports injuries, including those in adolescent athletes; ligament reconstruction; realignment surgery; cartilage repair and joint-preservation approaches; knee replacement; and technology-assisted hip and knee surgery.
- The consistent aim is to return people to meaningful function and activity while avoiding unnecessary downtime.
- Qualifications: MBBS, MRCS (Ed), MMed (Ortho), FRCSEd (Ortho).
More detail: Meet Dr Sean Leo
- Training and career: Dr Leo trained in medicine at the National University of Singapore and served in the Singapore Armed Forces Medical Corps from 2000 to 2012, where his work included the care of soldiers in physically demanding roles. He completed postgraduate orthopaedic training in 2009 and a one-year clinical fellowship at Royal North Shore Hospital in Sydney, Australia, before joining Changi General Hospital as an orthopaedic consultant in 2012, where he later held the positions of Senior Consultant and Director of the Hip and Knee Service. With seniority, his educational contribution has evolved towards mentorship and support for junior doctors.
OrthoKinetics Recovery Reflection
Recovery reflection
What would it mean to measure a new knee by the life it makes possible, rather than by how it feels?
A replaced knee will not feel like the knee of thirty years ago, and expecting that can be a source of quiet disappointment. A fairer measure is what the knee lets you do: the stairs, the walk to the market, getting down to play with a grandchild, being able to say yes to an ordinary invitation. Those are the things that make a knee matter, and they are worth naming at the start.
What does accepting a change like this look like?
Accepting that a joint has worn is not defeat, and it is not giving in. It is seeing your situation honestly so that you can make a decision that fits your life. There is dignity in choosing a path for the sake of the independence and activities that matter to you, and in recognising that this is a choice, not a failure.
What a knee is for is the life it lets you live, and that is a fair way to judge any decision about it.
Illustrative image
Questions people often ask
Common questions
Frequently asked questions
Am I a candidate for a knee replacement?
Candidacy is a clinical judgement, not a scan result. Knee replacement is usually considered when arthritis causes persistent pain and loss of function despite adequate non-surgical treatment, and the effect on your quality of life is material [1][9]. The decision is made with you after assessment, not by an X-ray grade or a pain score on its own.
Do I need surgery, or can my arthritis be managed without it?
Many knees are managed well without surgery. Analgesia, physiotherapy, weight management, activity modification and injections where appropriate are legitimate treatment, and they come first [2][7]. Surgery is discussed when these measures have been given a fair trial and are no longer managing the problem.
What is the difference between total and partial knee replacement?
A partial replacement resurfaces one worn compartment; a total replacement resurfaces the whole joint [8]. Partial replacement can offer better short-term function for suitable patients, with a possibly higher long-term revision rate; where both are suitable, the choice is a shared decision [6][8][11].
How long does a knee replacement last?
Pooled registry data show around 82.3% of total knee replacements still functioning at 25 years [10], and about 3% are revised within 10 years [11]. These are population figures, not personal guarantees.
What does recovery feel like week by week?
Recovery starts within hours, with structured rehabilitation through defined phases. Most day-to-day function typically returns within 2 to 3 months; full recovery commonly takes up to a year or more [1]. Timelines vary widely between individuals and are not personal promises.
When can I walk, drive, travel or climb stairs again?
Walking begins with aids and progresses to independent walking. Driving is an individual-clearance decision: in one study of 156 patients the median return was about 18 days, but clearance depends on stopping sedating medication and being able to control the car safely [12]. Travel and stairs are milestone-based, not date-based.
What are the real risks, and how common are they?
Infection around the implant is uncommon — reported in roughly 1 in 100 patients (about 1%), with published rates varying from under 0.5% to about 2% depending on the population and length of follow-up studied — but it is serious when it occurs [15]. Blood clots are a real but reducible risk managed with preventive measures [4]. Longer term, some implants loosen or wear and need revision surgery [9][11]. A minority of patients have persistent pain, and most, but not all, patients improve.
How much does knee replacement cost in Singapore, and what does Medisave or insurance cover?
A cost estimate for surgery can be given only after a consultation and assessment, once a surgical plan has been developed. Every individual’s implant needs, procedure time and other factors are different, so no single figure applies to everyone. The clinic provides a personal estimate if you proceed to surgery, which is also used to help with insurance pre-authorisation where applicable. Medisave, MediShield Life and Integrated Shield Plans are the scheme routes through which cover may apply; eligibility and the amount covered depend on your personal circumstances and policy terms.
Is robotic knee replacement better?
A major clinical practice guideline found no significant short-term difference in function, outcomes or complications between robotic-assisted and conventional total knee replacement, and long-term superiority is not established [8]. It is a technique option, not a premium outcome promise.
What do people mean by a “knee specialist”?
“Knee specialist” is an everyday phrase many people use when looking for a doctor for a knee problem. In Singapore, doctors may only use the specialist titles accredited by the Specialist Accreditation Board (SAB) of the Ministry of Health (MOH). Orthopaedic Surgery is an accredited specialty; the knee is an area of clinical interest within it. “Knee specialist” is not a separate specialist registration; however, individual orthopaedic surgeons may have particular clinical interests within their specialty. The doctor most people have in mind is an orthopaedic surgeon whose practice focuses on knee conditions. Dr Sean Leo is registered as a specialist in Orthopaedic Surgery, and his clinical interest is the knee. He completed a postgraduate knee fellowship programme in Sydney, Australia, at the Royal North Shore Hospital under Dr Myles Coolican and Dr David Parker from 2009 to 2010. Dr Leo was also Director of the Hip and Knee Service at Changi General Hospital from 2014 to 2018.
Costs and insurance
Costs and insurance
Practicalities
Cost, Medisave and insurance
- Implant choice — the type of prosthesis used is a meaningful component of the bill.
- Length of stay — how many nights you are admitted affects the total.
- Complexity — a straightforward case costs less than one with additional medical needs.
- Facility — public, subsidised, and private settings are priced differently.
The cost of a knee replacement in Singapore varies from person to person. Several things drive the final bill, and no single figure tells the whole story.
What tends to influence cost:
A cost estimate for surgery can be given only after a consultation and assessment, once a surgical plan has been developed. Each individual condition is unique — implants used, time taken, and other factors contribute to the overall estimate. The estimate will be provided to you by the clinic should you decide on surgical management, and will also be used to assist in obtaining pre-authorisation from insurance where applicable.
Medisave, MediShield Life, and Integrated Shield Plans are the scheme routes through which a knee replacement may be partly funded in Singapore. Eligibility, claim limits, and the amount actually covered depend on your personal circumstances and policy terms, so this page cannot advise on what any individual will pay or recover.
Insurance panels. Dr Sean Leo, Orthopaedic Surgeon, is on the specialist panels of Great Eastern (GE Panel), HSBC Life (HSBC Life Shield) and Singlife (Singlife Shield), and on the Prudential Panel. AXA Insurance Singapore became part of HSBC Life in 2023, and former AXA Shield plans are now HSBC Life Shield plans.
Corporate health plans. Dr Leo is on the panels of both Alliance Medinet and iXchange, which administer medical benefits for many company health plans. If your company plan uses either panel, you can see Dr Leo as a panel doctor.
If your company uses a different panel. Some company plans still let you see a doctor of your choice outside their panel, then claim reimbursement. This varies from plan to plan, as may the co-payment, so please check your benefits with your company’s HR department.
Panel arrangements change from time to time, so please confirm with your insurer or your company’s plan administrator before your appointment.
Dr Leo is on the panels shown. If your insurer is not listed, you may ask whether co-management with an Orthosports surgeon partner on that panel is clinically and administratively appropriate. Orthosports surgeon partners are collectively on the panels of all Shield plans.
Benefits, pre-authorisation, letters of guarantee, panel rules and reimbursement depend on your individual policy and the insurer’s decision. Neither panel status nor co-management guarantees coverage, approval or cashless treatment. The clinic team can assist with claim paperwork, but cannot promise the outcome.
For an individual estimate of what a knee replacement would cost you, arrange an assessment through the verified OrthoSports appointment and contact route.
Arrange a consultation: the appointment section is further down this page.
Sources
References
References
- NICE NG157 — Joint replacement (primary): hip, knee and shoulder (2020). https://www.nice.org.uk/guidance/ng157
- NICE NG226 — Osteoarthritis in over 16s: diagnosis and management (2022). https://www.nice.org.uk/guidance/ng226
- NICE NG180 — Perioperative care in adults (2020, updated 2025). https://www.nice.org.uk/guidance/ng180
- NICE NG89 — Venous thromboembolism in over 16s (2018, updated 2019). https://www.nice.org.uk/guidance/ng89
- NICE NG125 — Surgical site infections: prevention and treatment (2019). https://www.nice.org.uk/guidance/ng125
- NICE QS206 — Joint replacement (primary): hip, knee and shoulder (quality standard). https://www.nice.org.uk/guidance/QS206
- AAOS — Management of Osteoarthritis of the Knee (Non-Arthroplasty), 3rd ed. (2021). https://www.aaos.org/oak3cpg
- AAOS — Surgical Management of Osteoarthritis of the Knee CPG, 2nd ed. (2022). https://www.aaos.org/smoak2cpg
- Price AJ, et al. Knee replacement. Lancet 2018;392:1672–1682. DOI 10.1016/S0140-6736(18)32344-4
- Evans JT, et al. How long does a knee replacement last? Lancet 2019. PMID 30782341. DOI 10.1016/S0140-6736(18)32531-5
- National Joint Registry, 21st Annual Report 2024. https://reports.njrcentre.org.uk/
- Pekas DR, et al. Factors That Influence Returning to Driving Following Primary Total Knee Arthroplasty: A Prospective Investigation. J Bone Joint Surg Am. 2025;107(9):968–975. PMID 40146809. DOI 10.2106/JBJS.24.01177
- Qiao Y, Li F, Zhang L, Song X, Yu X, Zhang H, Liu P, Zhou S. A systematic review and meta-analysis comparing outcomes following total knee arthroplasty for rheumatoid arthritis versus for osteoarthritis. BMC Musculoskelet Disord. 2023;24(1):484 (epub 13 June 2023). DOI 10.1186/s12891-023-06601-9
- Robotic-assisted total knee arthroplasty in post-traumatic and previously operated knees with retained hardware: Practical decision-making workflow. J Robot Surg. 2026. doi:10.1007/s11701-026-03586-0
- Ma T, Jiao J, Guo DW, Lv SZ, Zhang D, Hou DC. Incidence of periprosthetic joint infection after primary total knee arthroplasty shows significant variation: a synthesis of meta-analysis and bibliometric analysis. J Orthop Surg Res. 2024;19(1):649. DOI 10.1186/s13018-024-05099-8. Open access (CC BY 4.0); full text readable at origin (PMC / Springer).
Final next step
Final next step
Next step
Final next step
Reading about a problem is a starting point. An assessment brings together the history, an examination where needed and any useful tests, and helps you and your clinician decide what to do next. How much physical examination is needed is a matter of clinical judgement. It may be limited when pain makes an examination unreliable, or when imaging clearly shows a problem that matches the symptoms, such as a fracture seen on an X-ray or an MRI scan that clearly shows an injury consistent with the symptoms. The Singapore Medical Council and the UK General Medical Council both allow remote medical consultations, where a physical examination is not possible, with safeguards: the doctor must be clear about the limits of an opinion formed without an examination, and whether an in-person examination is needed, or referral to other services, is left to the clinical judgement of the attending doctor.
Signs that need urgent help
Some symptoms should not wait for a routine appointment. Each item below says where to go.
After an injury
- The leg looks twisted or bent, a bone is showing, there is a deep cut, or the foot or leg turns cold, pale, numb, blue or white. Go to an emergency department or call 995.
- You cannot lift your leg up with the knee kept straight, and you may feel a gap just above or just below the kneecap. Arrange an urgent same-day assessment.
At any time
- The knee is stuck and will not straighten, or it is very painful and you cannot move it or put weight on it. Arrange an urgent same-day assessment.
- The knee is suddenly very painful, hot, red and swollen, especially with a fever or feeling generally unwell. Go to an emergency department or call 995.
- One calf or thigh is newly painful and swollen. Arrange an urgent same-day assessment. If you also feel short of breath or have chest pain, go to an emergency department or call 995.
After knee surgery
- The operated knee becomes more painful, swollen or red, a wound is leaking, or you develop a fever. Go to an emergency department or call 995, or contact your surgical team straight away.
If you are admitted by the doctor at the urgent care centre of one of these private hospitals, the Parkway Pantai hospitals (Mount Elizabeth Orchard, Mount Elizabeth Novena, Gleneagles and Parkway East), Farrer Park Hospital and Thomson Medical Centre, you may ask for Dr Sean Leo to be your attending orthopaedic surgeon. If you are instead discharged and referred for orthopaedic follow-up, you may contact the clinic to arrange an appointment. Both are subject to the hospital’s admission processes and to Dr Leo’s availability.
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38 Irrawaddy Road, #10-41 Mount Elizabeth Novena Specialist Centre, Singapore 329563 Map for Orthosports@Novena (opens Google Maps)
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