Discover everything about knee replacement surgery, including when it's needed, total vs. partial knee replacement, procedure steps, recovery time, surgery costs in India, benefits, risks, and tips for choosing the right surgeon.
Knee Replacement Surgery: Procedure, Cost, Recovery, Benefits & Risks
Knee pain can make everyday activities such as walking, climbing stairs, standing, or even sleeping uncomfortable. For people experiencing severe knee arthritis or joint damage, knee replacement surgery may offer long-term pain relief and improved mobility.
Knee replacement surgery, also known as knee arthroplasty, is a commonly performed orthopedic procedure in which damaged joint surfaces are replaced with artificial components.
However, deciding to undergo knee replacement is an important medical and financial decision. Patients should understand the procedure, available alternatives, potential complications, recovery expectations, and overall treatment costs before proceeding.
In this comprehensive guide, we explain everything you need to know about knee replacement surgery in 2026.
What Is Knee Replacement Surgery?
Knee replacement surgery is a procedure in which an orthopedic surgeon removes damaged cartilage and a small amount of underlying bone from the knee joint and replaces the affected surfaces with artificial components.
These components are typically made from medical-grade metal alloys and durable plastic.
The primary goals of knee replacement surgery are to:
- Reduce chronic knee pain
- Improve joint function
- Restore mobility
- Correct certain knee deformities
- Improve the ability to perform everyday activities
- Enhance overall quality of life
Despite the name, knee replacement does not involve removing the entire knee. Instead, the surgeon replaces the damaged joint surfaces while preserving much of the surrounding anatomy.
When Is Knee Replacement Surgery Needed?
Not every person experiencing knee pain requires surgery.
Orthopedic specialists generally consider knee replacement when joint damage causes substantial symptoms that do not respond adequately to appropriate nonsurgical treatments.
Common Reasons for Knee Replacement
1. Severe Osteoarthritis
Osteoarthritis is one of the most common reasons for knee replacement. It occurs when the protective cartilage covering the joint surfaces gradually breaks down, causing pain, stiffness, and reduced mobility.
2. Rheumatoid Arthritis
Rheumatoid arthritis is an autoimmune disease that can cause inflammation, cartilage damage, and progressive joint deterioration.
3. Post-Traumatic Arthritis
Previous knee injuries, including certain fractures or ligament injuries, may contribute to joint damage and arthritis over time.
4. Severe Knee Deformity
Some patients develop significant bowing or inward angulation of the legs, accompanied by pain and impaired function.
5. Persistent Pain Despite Treatment
Surgery may be considered when medication, physical therapy, activity modification, or other suitable treatments no longer provide adequate relief.
Signs You May Need a Knee Replacement
Consult an orthopedic specialist if you experience:
- Severe knee pain during everyday activities
- Persistent pain that interferes with sleep
- Difficulty walking or climbing stairs
- Significant knee stiffness
- Swelling associated with advanced arthritis
- Reduced ability to bend or straighten the knee
- Increasing difficulty performing routine activities
The decision to undergo surgery should be based on symptoms, examination findings, imaging, medical history, and personal treatment goals—not an X-ray alone.
Types of Knee Replacement Surgery
There are several types of knee replacement procedures. The most appropriate option depends on the location and severity of joint damage, ligament function, and other clinical factors.
1. Total Knee Replacement (TKR)
Total knee replacement is the most common type of knee arthroplasty.
The surgeon replaces the damaged joint surfaces at the ends of the thighbone and shinbone. The underside of the kneecap may also be resurfaced when appropriate.
Best suited for: Patients with extensive arthritis affecting multiple parts of the knee joint.
2. Partial Knee Replacement (PKR)
Partial knee replacement involves replacing only the damaged compartment of the knee while preserving the remaining healthy joint surfaces.
Best suited for: Selected patients with arthritis limited to one compartment and suitable ligament function.
Potential advantages in appropriately selected patients may include a smaller operation and faster early recovery. However, partial replacement is not suitable for everyone, and additional surgery may eventually be required.
3. Revision Knee Replacement
Revision surgery involves replacing or repairing components of an existing knee implant.
It may be necessary because of infection, implant loosening, instability, wear, fracture, or other complications.
Revision procedures are generally more complex than primary knee replacements.
How Is Knee Replacement Surgery Performed?
Although techniques vary, knee replacement surgery generally follows several important stages.
Step 1: Preoperative Evaluation
Before surgery, the medical team reviews the patient's health and surgical risks.
Evaluation may include:
- Medical history and physical examination
- Knee X-rays
- Blood tests
- Medication review
- Assessment of existing health conditions
- Anesthesia evaluation
Additional testing may be required depending on the patient's medical condition.
Step 2: Anesthesia
Knee replacement may be performed under general anesthesia or regional anesthesia, such as spinal anesthesia, often with sedation.
The anesthesia team selects an appropriate approach based on the patient's health and preferences.
Step 3: Removing Damaged Joint Surfaces
The orthopedic surgeon makes an incision over the knee and carefully prepares the damaged bone and cartilage surfaces.
Step 4: Implant Placement
Artificial components are positioned on the prepared bone surfaces.
A durable plastic insert provides a smooth bearing surface between the metal components.
Depending on the implant system and surgical approach, components may be fixed with bone cement or through other fixation methods.
Step 5: Closing the Incision
After checking joint movement, stability, and alignment, the surgeon closes the incision and applies a dressing.
Step 6: Early Recovery and Rehabilitation
Patients are monitored after surgery and usually begin assisted movement and walking soon afterward, according to their clinical condition.
The exact hospital stay and rehabilitation plan vary between patients and hospitals.
How Long Does Knee Replacement Surgery Take?
A primary knee replacement operation often takes approximately one to two hours, although the duration varies according to surgical complexity and technique.
Additional time is required for anesthesia preparation and postoperative monitoring.
Some patients may be discharged the same day, while others require one or more nights in the hospital.
The discharge decision depends on pain control, mobility, medical stability, home support, and other factors.
Knee Replacement Surgery Cost in India
One of the most important considerations for patients is understanding the total cost of treatment.
Knee replacement costs in India vary substantially depending on the hospital, city, surgeon, implant type, procedure complexity, and insurance coverage.
Rather than relying on a single advertised price, patients should request a detailed written estimate.
Factors That Affect Knee Replacement Costs
Hospital and Location
Hospital charges vary across cities, facilities, and room categories.
Type of Surgery
Total, partial, bilateral, and revision knee replacement procedures have different resource requirements and costs.
Implant Selection
Implant design, manufacturer, materials, and fixation method can influence pricing.
Surgeon's and Anesthesia Fees
Professional fees may differ based on the treatment team and hospital arrangements.
Hospital Stay
Room charges, nursing care, medications, and additional hospital days may increase expenses.
Rehabilitation
Physiotherapy, walking aids, follow-up consultations, and home rehabilitation may involve additional costs.
What Should You Ask Before Paying?
Before scheduling surgery, request a written breakdown covering:
- Surgeon's fees
- Anesthesia charges
- Operating room charges
- Implant costs and details
- Hospital room and nursing charges
- Diagnostic tests
- Medicines and consumables
- Physiotherapy
- Follow-up appointments
- Possible additional charges for complications
Ask which expenses are included in a quoted package and which may be billed separately.
Is Knee Replacement Covered by Health Insurance?
Many health insurance policies may cover medically necessary knee replacement surgery, subject to their terms and conditions.
Coverage can depend on:
- Policy exclusions
- Waiting periods
- Preauthorization requirements
- Room rent limits
- Copayments and deductibles
- Hospital network eligibility
- Implant and package limits
Patients should confirm coverage directly with their insurer before surgery.
PublicListen Tip: Comparing itemized estimates from different hospitals can help patients understand treatment costs and avoid unexpected expenses.
Knee Replacement Recovery Timeline
Recovery after knee replacement is gradual and varies from person to person.
Factors such as age, muscle strength, overall health, preoperative mobility, and participation in rehabilitation can influence recovery.
First 24–48 Hours
Many patients begin standing and walking with assistance shortly after surgery.
The healthcare team focuses on pain management, safe movement, wound care, and preventing complications.
Week 1–2
Patients generally continue walking exercises and physiotherapy.
Swelling, stiffness, and discomfort are common during this period.
Some people use a walker or crutches while improving their mobility.
Weeks 3–6
Walking ability and independence with everyday activities often improve.
Some patients may begin returning to selected routine activities, depending on their progress and medical advice.
Weeks 6–12
Strength, flexibility, and endurance generally continue improving.
Some patients can resume additional activities, including driving or work, once they meet the appropriate functional and medical requirements.
Three to Six Months
Many patients experience substantial improvements in mobility and pain, although recovery continues.
Six to Twelve Months
Strength, swelling, comfort, and overall knee function may continue improving for up to a year or longer.
Important: These are general recovery estimates, not guaranteed milestones. Always follow your surgeon's and physiotherapist's individualized rehabilitation instructions.
Physiotherapy After Knee Replacement
Physiotherapy is an essential part of recovery.
A rehabilitation program may include:
- Knee bending and straightening exercises
- Quadriceps strengthening
- Walking practice
- Balance exercises
- Stair training
- Gradual improvement in daily activities
Regular participation in the prescribed program can help improve movement and function.
Avoid performing exercises that your rehabilitation team has advised against.
Benefits of Knee Replacement Surgery
For appropriately selected patients, knee replacement can provide substantial benefits.
1. Long-Term Pain Relief
Many patients experience significant reductions in arthritis-related knee pain.
2. Improved Mobility
Reduced pain and improved joint function may make walking and other daily activities easier.
3. Better Quality of Life
Patients may find it easier to participate in family activities, hobbies, and everyday routines.
4. Improved Joint Alignment
Surgery may correct certain deformities associated with advanced arthritis.
5. Durable Results
Modern knee implants can function for many years.
A large published analysis reported that approximately 82% of total knee replacements lasted 25 years, based on available long-term registry evidence.
However, implant survival varies, and not every patient will achieve the same result.
Risks and Complications of Knee Replacement
Like any major operation, knee replacement surgery carries potential risks.
Possible complications include:
Infection: Infection can develop around the surgical wound or artificial joint and may require additional treatment or surgery.
Blood Clots: Deep vein thrombosis can occur after surgery. In some cases, a clot may travel to the lungs and cause a pulmonary embolism.
Persistent Pain or Stiffness: Some patients continue to experience discomfort or limited movement despite surgery.
Implant Loosening or Wear: Artificial components may wear out or become loose over time.
Nerve or Blood Vessel Injury: Damage to nearby structures is uncommon but possible.
Anesthesia-Related Complications: Risks vary according to the patient's health and the type of anesthesia used.
Your surgeon should explain the risks most relevant to your circumstances.
Warning Signs After Surgery
Seek urgent medical advice if you develop increasing wound redness, drainage, fever, or worsening knee pain.
Seek emergency medical care for sudden shortness of breath, chest pain, fainting, or other signs of a possible pulmonary embolism.
New calf swelling or pain also requires prompt medical assessment.
Alternatives to Knee Replacement Surgery
Surgery is not always the first or best treatment option.
Depending on the condition, nonsurgical treatments may include:
Physical Therapy
Targeted exercises can improve muscle strength, joint support, and mobility.
Weight Management
For patients who are overweight, reducing excess body weight may decrease stress on the knee.
Pain-Relieving Medication
Doctors may recommend appropriate topical or oral medications based on individual health risks.
Walking Aids
Canes, braces, or other supportive devices may improve comfort and stability.
Injections
Certain injections may provide temporary symptom relief for selected patients, although benefits and recommendations vary.
Lifestyle Modifications
Low-impact activities, such as swimming or cycling, may help maintain fitness without excessive joint stress.
If nonsurgical treatments no longer provide adequate relief, a specialist may discuss surgical options.
How to Choose the Right Knee Replacement Surgeon
Choosing an experienced orthopedic surgeon is an important part of treatment planning.
Consider the following factors:
Qualifications and Training
Check the surgeon's orthopedic qualifications and experience in joint replacement surgery.
Relevant Surgical Experience
Ask how frequently the surgeon performs the procedure being recommended.
Treatment Approach
A good consultation should explain both surgical and nonsurgical options.
Hospital Facilities
Ask about infection prevention practices, anesthesia support, rehabilitation services, and emergency care.
Communication
The surgeon should answer questions clearly and explain expected benefits, limitations, and risks.
Cost Transparency
Request an itemized estimate and clarification of possible additional expenses.
Second Opinion
Patients can seek a second opinion before elective surgery, especially when uncertain about the diagnosis, recommended procedure, or costs.
Important Questions to Ask Before Knee Replacement
Before agreeing to surgery, consider asking:
- Why is knee replacement recommended in my case?
- Are there suitable alternatives to surgery?
- Do I need total or partial knee replacement?
- What results can I realistically expect?
- What complications am I personally at risk for?
- Which implant is recommended, and why?
- How long might I need rehabilitation?
- When can I return to work and everyday activities?
- What is the complete estimated cost?
- What happens if I experience complications after discharge?
Clear answers can support informed consent and better treatment decisions.
Frequently Asked Questions About Knee Replacement
1. Is knee replacement surgery painful?
Some postoperative pain is expected. However, anesthesia, pain medication, and rehabilitation help manage discomfort during recovery.
2. How long does an artificial knee last?
Many knee implants function for 15–20 years or longer. Longevity varies based on the implant, patient characteristics, activity level, and other factors.
3. Can I walk normally after knee replacement?
Many patients experience substantial improvements in walking and everyday mobility. However, individual results depend on preoperative function, rehabilitation, and other health conditions.
4. What is the best age for knee replacement?
There is no single ideal age. The decision depends on symptoms, joint damage, health, expected benefits, and personal circumstances.
5. Is robotic knee replacement better?
Robotic-assisted systems can help surgeons plan and perform certain steps with precision. However, evidence does not establish that robotic assistance consistently produces better long-term patient outcomes than well-performed conventional surgery.
6. Can both knees be replaced at the same time?
Simultaneous bilateral knee replacement may be appropriate for selected patients. It can involve additional medical risks, so the decision requires careful assessment.
7. Can I climb stairs after knee replacement?
Many patients return to stair climbing during recovery, often beginning with assistance and progressing through rehabilitation.
8. Is knee replacement a permanent cure for arthritis?
Knee replacement removes damaged joint surfaces and can provide long-lasting relief. However, it does not cure arthritis elsewhere in the body, and implants can eventually wear out or require revision.
Final Thoughts
Knee replacement surgery can be an effective treatment for people living with severe knee arthritis and persistent pain.
For many patients, it provides meaningful improvements in comfort, mobility, and quality of life.
However, successful treatment begins with understanding the diagnosis, evaluating available options, selecting an appropriate surgical team, and preparing for rehabilitation.
Before making a decision, discuss your expectations, surgical risks, implant options, recovery requirements, and complete treatment costs with your healthcare team.
At PublicListen, we believe informed patients are better equipped to make confident healthcare decisions.
Understand your options, ask the right questions, and make your health a priority.
Medical Disclaimer
This article is intended for general educational purposes only and does not replace professional medical advice, diagnosis, or treatment. Knee replacement recommendations and outcomes vary between individuals. Consult a qualified orthopedic specialist for personalized medical guidance.
Medical References
- American Academy of Orthopaedic Surgeons — Total Knee Replacement: https://orthoinfo.aaos.org/en/treatment/total-knee-replacement/
- NHS — Knee Replacement: https://www.nhs.uk/tests-and-treatments/knee-replacement/
- American Association of Hip and Knee Surgeons — Patient Education: https://hipkneeinfo.org/
- Evans JT et al. (2019). How long does a knee replacement last? The Lancet. https://doi.org/10.1016/S0140-6736(18)32531-5
