KNEE · ARTHRITIS GUIDE

Knee arthritis: the gap between what your X-ray shows and how your knee feels.

Most patients arrive believing there are only two options, painkillers or a knee replacement. There are at least six, and replacement is the last of them. This guide explains what your X-ray actually means, which treatments genuinely work at which stage, and how the decision to replace a knee is properly made.

Dr. Prashant Parate · Shoulder, Knee & Sports Injury Surgeon · In orthopaedic practice since 2010, DNB-qualified since 2012 · Jupiter Hospital (Baner) & Sainath Hospital (Moshi, PCMC) · Reviewed July 2026

Related: Meniscus Tear: Repair or Removal

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What knee arthritis actually is

The ends of the bones in your knee are covered by articular cartilage, a smooth white surface a few millimetres thick that lets the joint glide almost without friction. Osteoarthritis is the gradual loss of that surface.

As cartilage thins, the space between the bones narrows. The bone underneath thickens and responds by forming spurs at the edges. The joint lining becomes inflamed at intervals, which is why arthritis flares rather than progressing at a steady rate. In advanced disease the cartilage is gone entirely and bone rubs against bone.

Two things worth understanding early. First, cartilage does not grow back, so no treatment reverses established arthritis, whatever is advertised. Second, and more usefully, arthritis is not one disease with one endpoint. Many knees settle into a stable state and stay comfortable for decades with the right management.

Why your X-ray and your symptoms often disagree

This is the single most important thing on this page, and it surprises almost every patient.

People with severe changes on X-ray sometimes walk comfortably and need very little. Others with mild changes have significant pain and difficulty. The correlation between what the film shows and what the person feels is genuinely weak.

This matters because it means an X-ray alone should never decide that you need a knee replacement. If you have been shown a film and told your knee is bone on bone and must be replaced, without anyone asking in detail about your pain at night, your walking distance, what you can no longer do, and what treatment you have already tried, then the decision has been made on incomplete information.

We treat the patient, not the radiograph.

Symptoms, and what each one tells us

• Pain on stairs, especially coming down. Usually the earliest complaint, and often the first thing patients notice.
• Difficulty squatting, sitting cross-legged, or using an Indian toilet. These matter enormously in daily life here and are frequently the reason people finally seek help.
• Stiffness after sitting, easing after a few minutes of walking. Characteristic of arthritis rather than injury.
• Swelling that comes and goes, typically after a long day or unusual activity.
• A bow-legged appearance developing over years. The inner compartment wears first in most Indian knees, and as it collapses the leg bows outward.
• Night pain and pain at rest. This one is different from the others. Pain that wakes you, or that is present when you are not using the knee at all, signals advanced disease and is one of the strongest indications that replacement should be discussed.

Diagnosis: the right X-ray, and usually no MRI

Arthritis is diagnosed on standing X-rays, not lying-down ones. This is not a technicality. Cartilage loss only shows properly when the joint is bearing your body weight, and a knee that looks acceptable lying on a couch can show clear narrowing when you stand on it. If your X-ray was taken lying down, it has understated your arthritis.

A full-length standing alignment film, from hip to ankle, is the other one that matters. It shows how your body weight passes through the knee, and whether the wear is being driven by a bow-legged or knock-kneed limb. It is the film that decides whether realignment surgery is an option instead of replacement. It is not routine everywhere, and it should be.

MRI is usually unnecessary in established arthritis, and can actively mislead. In an arthritic knee an MRI will almost always report a degenerative meniscus tear, because worn joints have worn menisci. Patients are then offered arthroscopy for that tear, which does not treat the arthritis and rarely helps. The scan found something true and irrelevant.

Which part of the knee is worn? This decides everything

Your knee has three compartments: the medial compartment on the inner side, the lateral on the outer side, and the patellofemoral compartment behind the kneecap.

In the majority of Indian patients the medial compartment wears first and worst, which is why bow-legged deformity is so much more common here than knock-knee. This matters because a knee with one worn compartment and two healthy ones has options that a globally worn knee does not: realignment surgery to shift load away from the damaged side, or a partial replacement resurfacing only that compartment. A knee worn in all three compartments has effectively one surgical option.

The decision pathway

Treatment options, honestly assessed

Treatment	What it does	Honest verdict
Strengthening and weight reduction	Reduces load through the joint and improves the muscular support around it	The most effective non-surgical treatment there is. Underused because it requires effort rather than a prescription
Activity modification	Reduces the movements that load the joint most, particularly deep squatting and stairs	Genuinely helpful, and does not mean giving up walking, which remains good for the knee
Painkillers and anti-inflammatories	Control symptoms during flares	Useful short term. Long-term daily use carries real stomach, kidney and cardiac risks, and is not a plan
Steroid injection	Settles an inflammatory flare	Effective for weeks to a few months. Reasonable occasionally, not repeatedly, since frequent injections harm cartilage
Hyaluronic acid injection	Supplements joint fluid	Evidence is mixed. Some patients get useful relief for several months, many get little. Best considered in mild to moderate arthritis, not advanced
PRP injection	Concentrated platelets from your own blood	Reasonable evidence in mild to moderate arthritis in younger patients. Little value in advanced disease. Not a cartilage regrowth treatment
Stem cell therapy	Marketed as regenerating cartilage	The regeneration claim is not supported by current evidence. Expensive, unregulated in much of India, and I would not recommend paying for it
High tibial osteotomy	Realigns the limb to unload the worn compartment	Genuinely joint-preserving. The right operation for the right knee, and underused in India
Partial knee replacement	Resurfaces one compartment only	Excellent when it fits. Faster recovery and a more natural feeling knee than total replacement
Total knee replacement	Resurfaces the whole joint	One of the most reliable operations in orthopaedics when properly indicated. The problem is timing, not the operation

Can knee replacement be delayed?

Often yes, and for the right patient that is the correct aim. Weight reduction, sustained strengthening, sensible activity modification, occasional injections and, where the pattern of wear allows it, realignment surgery can buy years of comfortable use of your own knee.

But delay has a cost when it is taken too far. A knee left until walking has become minimal loses quadriceps strength, the other knee and the hips take the strain, general fitness declines, and deformity becomes fixed. Recovery after replacement is measurably harder from that starting point. The aim is not to postpone surgery for as long as physically possible. It is to have it at the point where it genuinely improves your life, and not before.

The honest framing: preserve the natural joint whenever preservation can still give reliable relief and function. Replace it when it can no longer do so.

Life after knee replacement, realistically

A well-done knee replacement reliably relieves arthritic pain and restores comfortable walking, stairs, and normal daily activity. Most patients return to routine life within a few months and describe it as one of the best decisions they made.

What it does not do is give you back a nineteen-year-old knee. Deep squatting and prolonged cross-legged sitting are usually limited afterwards, which matters more in India than in Western practice, and you should hear this before surgery rather than discover it later. Many patients manage floor sitting to some degree, but it is not guaranteed and should not be promised. Running and jumping sports are not advised. Modern implants commonly last fifteen to twenty years or more, which is why age and activity influence timing.

Cost and insurance in Pune

Total knee replacement in Pune typically ranges between ₹2 and ₹4.5 lakh per knee, depending on hospital category, implant, and room type. Robotic-assisted replacement generally adds to that. High tibial osteotomy and partial knee replacement usually cost less than a total replacement.

Knee replacement is covered by most health insurance policies, with cashless treatment at empanelled hospitals, and is also covered under many government and corporate schemes. Two practical points: most policies impose a waiting period of two to four years for joint replacement, so check your policy start date, and begin pre-authorisation well before a planned date.

Indicative ranges, not quotations. An exact estimate is given after assessment.

Frequently asked questions

My X-ray says bone on bone. Do I have to have a replacement?

Not automatically. Bone on bone describes the film, not your life. If your pain is manageable, you sleep through the night, and you are doing what you need to do, there is no obligation to operate on an X-ray. The decision comes from your symptoms and your function, with the X-ray as supporting information.

Will walking damage my knee further?

No, and this is one of the most damaging misconceptions in arthritis. Walking maintains cartilage nutrition, muscle strength and general health, and inactivity makes arthritic knees worse rather than better. What is worth reducing is deep squatting, repeated stair climbing and heavy load carrying. Level walking is good for you.

Can I sit cross-legged after a knee replacement?

Sometimes, partly, and it should not be promised. Many patients achieve a degree of floor sitting, but deep squatting and prolonged cross-legged sitting are usually restricted, and anyone guaranteeing otherwise is overselling. If floor sitting is essential to your daily life or religious practice, say so clearly before surgery, because it may influence both timing and whether joint preservation is a better fit for you.

Am I too young for a knee replacement?

Age matters, but as one factor rather than a rule. A replacement in a younger patient is more likely to need revision within their lifetime, which is exactly why joint-preserving options such as osteotomy and partial replacement deserve serious consideration first in that group. If preservation genuinely will not give you a usable knee, being young is not a reason to spend a decade in pain.

Do I need both knees done, and can they be done together?

Both knees are often affected, but they are rarely equally symptomatic, and operating on the worse one frequently improves the other by restoring normal walking. Doing both in one sitting is possible in selected fit patients and is a decision made on your general health rather than convenience. Most patients are better served by staging them.

Does knee arthritis run in families?

There is a familial tendency, particularly for the pattern of alignment and cartilage quality you inherit. It is not destiny. Weight, muscle strength, previous injury and previous surgery all influence how a knee ages, and those are the parts you can act on.

Do knee braces, supports and supplements help?

An unloader brace can genuinely help selected patients with single-compartment arthritis, though many find them cumbersome in Indian conditions. Simple elastic supports mostly provide reassurance rather than mechanical benefit, which has some value but is not treatment. Glucosamine and similar supplements have weak evidence overall, and I would not spend significant money on them.

I was told I need surgery, but I want another opinion. Is that reasonable?

Entirely reasonable, and I would encourage it particularly if replacement has been advised on the basis of an X-ray without a detailed discussion of your symptoms, or if joint-preserving alternatives were never mentioned. Bring your standing X-rays and any alignment films.

Key takeaways

• The X-ray does not decide. Your symptoms, your function and your night pain do.
• Strengthening and weight reduction outperform most injections, and are the foundation of every plan.
• Which compartment is worn changes the options entirely. Ask whether yours is one compartment or all three.
• Bow-legged knee with inner-compartment wear: ask about realignment before agreeing to replacement.
• Arthroscopy does not treat arthritis. Question it if offered for that purpose.
• Replacement is an excellent operation at the right time. The skill is in the timing, not the technique alone.

This page is patient education, not a substitute for consultation. Treatment decisions require clinical examination and imaging review. Last medically reviewed: July 2026 by Dr. Prashant Parate, DNB Orthopaedics, Fellowship in Arthroscopy & Sports Medicine (Thammasat University Hospital, Thailand). MMC Reg. 2006042129.