Knee pain that makes you think twice before climbing stairs, sitting cross-legged or going for an evening walk is more than a sign of ageing. For many people, it is the result of worn-out cartilage in the knee joint. When medicines, physiotherapy and injections stop giving relief, knee replacement surgery can help people walk comfortably again.
Knee replacement is one of the most common and successful orthopaedic surgeries performed today. Yet many patients delay it because of fear, uncertainty about recovery, or myths about the procedure.
At Prayag Hospital, Sector 41, Noida, orthopaedic care is where our story began. The hospital started as an orthopaedic centre in 1995. In this guide, our team explains who needs a knee replacement, what happens before and after surgery, and what a realistic recovery looks like.
What Is Knee Replacement Surgery?
In knee replacement surgery, also called knee arthroplasty, the surgeon removes the damaged bone and cartilage from the knee joint and replaces it with an artificial joint (implant) made of metal and medical-grade plastic. The implant recreates the smooth, gliding surface of a healthy knee, so the bones no longer grind against each other.
There are two main types:
| Type | What is replaced | Suited for |
|---|---|---|
| Total knee replacement (TKR) | All three compartments of the knee joint | Advanced arthritis affecting the whole knee; the most common type |
| Partial knee replacement | Only the damaged part of the knee | Damage limited to one area, with healthy ligaments |
Your orthopaedic surgeon will recommend the right option after examining your knee and reviewing X-rays or other scans.
Who Needs a Knee Replacement?
Age alone does not decide whether you need surgery. The decision depends on how much the knee damage affects your daily life and whether other treatments have stopped working.
Common conditions that lead to knee replacement
Osteoarthritis
The wear-and-tear arthritis that is the most common reason, especially after 55.
Rheumatoid Arthritis
An inflammatory condition that damages the joint lining.
Post-traumatic Arthritis
Follows an old fracture or ligament injury.
Knee Deformities
Bow legs or knock knees caused by arthritis.
- Knee pain that limits walking, climbing stairs or getting up from a chair
- Pain even while resting, or pain that disturbs your sleep
- Swelling and stiffness that do not improve with medicines or rest
- A knee that is visibly bending inwards or outwards
- Little or no relief from painkillers, physiotherapy, weight loss or injections over several months
- Dependence on a walking stick or support for short distances
If two or more of these sound familiar, an evaluation can help you understand your options. Surgery is not always the first step; many patients first benefit from structured physiotherapy and lifestyle changes.
What to Expect: Before, During and After Surgery
Before Surgery
- Evaluation: a detailed examination, X-rays and, if needed, other scans of the knee.
- Pre-operative tests: blood tests, ECG and a check of heart, lung, sugar and blood pressure levels to make sure you are fit for surgery.
- Medicine review: your doctor may adjust medicines such as blood thinners before surgery.
- Home preparation: keep frequently used items within reach, remove loose rugs, and arrange for a family member to help for the first few weeks. A raised toilet seat and grab bars in the bathroom are helpful.
During Surgery
- The surgery usually takes about one and a half to two hours.
- It is done under spinal or general anaesthesia, so you will not feel pain during the procedure.
- The surgeon removes the damaged surfaces of the thigh bone, shin bone and sometimes the kneecap, then fixes the implant in place.
Right After Surgery
- Pain is managed with medicines so you can begin moving early.
- Most patients stand and take a few steps with a walker within a day of surgery, under a physiotherapist's guidance.
- The usual hospital stay is around three to five days, depending on your recovery and overall health.
Knee Replacement Recovery Time: A Realistic Timeline
Recovery is gradual and differs from person to person. Age, fitness before surgery, other health conditions and, above all, regular physiotherapy all play a role. This is a general guide:
| Stage | What recovery usually looks like |
|---|---|
| Day 1 to 3 | Standing and walking a few steps with a walker; gentle knee-bending exercises begin |
| Week 1 to 2 | Discharge home; walking short distances with a walker; stitches or staples checked or removed around two weeks |
| Week 3 to 6 | Shifting from walker to stick; climbing stairs with support; most daily activities at home become easier |
| Week 6 to 12 | Walking independently for most people; returning to desk jobs and, with the surgeon's approval, driving |
| 3 to 6 months | Swelling settles; walking longer distances and climbing stairs more comfortably |
| 6 to 12 months | Full recovery for most patients, with the knee feeling increasingly natural |
Modern knee implants are durable, and for most patients they last 15 to 20 years or longer.
Risks and How to Make Recovery Smoother
Like any major surgery, knee replacement carries some risks, though serious complications are uncommon. These include infection, blood clots in the legs, stiffness, and, rarely, loosening or wear of the implant over time. Your surgical team takes specific steps to reduce each of these, including sterile operating protocols, early movement and blood-clot prevention.
- Fever, or redness, warmth or discharge from the wound
- New or increasing pain and swelling in the calf
- Sudden breathlessness or chest pain (seek emergency care immediately)
Tips for a smoother recovery
Do Your Physiotherapy Every Day
This is the single biggest factor in how well your new knee bends and how strong it becomes.
Keep the Wound Clean and Dry
Until your doctor says it has healed.
Use Your Walker or Stick
Use it as advised; do not rush to walk unsupported.
Manage Swelling
Elevate the leg and use ice packs as guided.
Control Sugar and Blood Pressure
This helps healing and lowers infection risk.
Maintain a Healthy Weight
It reduces load on the new joint and helps it last longer.
Attend All Follow-up Visits
So your surgeon can track your progress.
Knee Replacement at Prayag Hospital, Noida
Prayag Hospital began as an orthopaedic centre in 1995, and joint care remains at the heart of what we do. Patients from Noida, Greater Noida, Ghaziabad and East Delhi come to us for:
- Detailed knee evaluation by experienced orthopaedic surgeons
- Non-surgical treatment first, wherever it can help, including medicines and physiotherapy
- Total and partial knee replacement with a personalised surgical plan
- In-house physiotherapy and rehabilitation to guide recovery from the first day after surgery
- 24x7 emergency and critical care support
Prayag Hospital is NABH-accredited and CGHS empanelled, and is located in Sector 41, Noida, near Noida City Centre.
Frequently Asked Questions
