If you’re dealing with knee pain that no longer improves with medication or physiotherapy, you’ve likely come across the term “knee replacement” and wondered exactly what it involves. One of the most common misunderstandings patients have is thinking the entire knee joint is removed and replaced — that’s not actually the case.
Dr. Sushil Sharma, senior orthopedic and joint replacement surgeon with over 38 years of experience, explains knee replacement surgery and answers the questions patients ask most often.
Knee Replacement Is a Surface Replacement, Not a Full Joint Removal
A common misconception is that knee replacement means removing the entire knee. In reality, it’s a surface replacement — only the damaged surface of the joint is resurfaced, similar to how you might sand down and refinish the worn top of a table without replacing the table itself. The underlying bone stays largely intact; only the worn, damaged surface causing your pain is replaced with a smooth, new implant surface that restores natural movement.
This is why the procedure is more precisely called Total Knee Arthroplasty (TKA) rather than a full joint replacement.
Recovery Timeline: What to Expect After Surgery
One of the most reassuring things about modern knee replacement is how structured and predictable recovery has become. Based on Dr. Sharma’s clinical experience, here’s a realistic recovery timeline:
| Timeframe | What to Expect |
|---|---|
| Day 1 (next day) | Walking begins, with assistance; able to use the washroom independently |
| Days 1–8 | Walking with a walker |
| After Day 8 | Walking with a single stick/cane |
| Day 30–35 | Walking independently, without a stick |
| Day 10 onward | Begin climbing stairs, starting with a few steps and progressively increasing (roughly 8 → 10 → 15 → 20 steps as strength improves) |
| After recovery | Return to normal activities — work, markets, temple visits, and daily errands |
Most patients follow a structured 40-day exercise and rehabilitation program, with continuous, steady improvement throughout — recovery isn’t a single milestone but a gradual return to full mobility.
How Long Does a Knee Replacement Last?
With modern, high-quality implants, a knee replacement typically lasts 20 to 25 years. If a revision is ever needed after 15–20–25 years, revision knee surgery today is considerably easier and more refined than it used to be, thanks to better implant technology.
It’s also worth noting: most patients who undergo knee replacement after age 55 never need a second surgery in their lifetime. By the time implants would typically near the end of their lifespan, activity levels have naturally decreased, so the original implant continues to serve well.
Who Should Consider Knee Replacement?
Knee replacement is generally considered when:
- Chronic knee pain significantly limits daily activities like walking, climbing stairs, or standing for long periods
- Non-surgical treatments — medication, physiotherapy, lifestyle changes — no longer provide adequate relief
- Knee stiffness or deformity is progressively worsening
About Dr. Sushil Sharma
Dr. Sushil Sharma is one of India’s most senior and experienced orthopedic surgeons, with over 35 years of experience and particular expertise in knee replacement surgery. He performs knee replacement procedures at:
- Kailash Hospital & Heart Institute, Sector 27, Noida
- R.K. Hospital, Patparganj, East Delhi
He also offers in-person consultations at his clinic for patients evaluating their treatment options.
Frequently Asked Questions
Is the entire knee removed during knee replacement surgery? No. Only the damaged surface of the joint is replaced — the underlying bone structure remains largely intact. This is why the procedure is medically known as Total Knee Arthroplasty (surface replacement), not a full joint removal.
When can I walk after knee replacement surgery? Most patients begin walking with assistance the very next day after surgery and can use the washroom independently from day one.
How long does recovery take? Most patients follow a structured 40-day rehabilitation program, progressing from walker to stick to independent walking by day 30–35, with steady improvement throughout.
How long does a knee replacement last? Modern implants typically last 20–25 years, and revision surgery, if ever needed, is far more advanced and manageable than in the past.
Where can I consult Dr. Sushil Sharma for knee replacement? Dr. Sharma performs knee replacement at Kailash Hospital, Noida, and R.K. Hospital, Patparganj, East Delhi, and Total Orthopedic Solution at Mayur Vihar Phase 2 New Delhi 110091
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