Failed Knee Replacement: What 3,000 Surgeries Have Taught Me About When Revision Is Needed

By Dr. Jatinder Singla — MBBS, MS Orthopaedics, MCh Orthopaedics | Co-founder & Director, COJRI Chandigarh

In my 18 years of orthopaedic practice, some of the most challenging — and most meaningful — cases I manage are revision knee replacements. These are patients who had surgery, were told it went well, and then watched the relief they were promised slowly disappear. The pain came back. The knee stopped feeling stable. Something was not right, and no one had given them a clear answer about why.

This article is for those patients. I want to explain, from my perspective as a surgeon who has performed hundreds of revision procedures in Chandigarh and across the Tricity region, what a failing knee implant looks like, what causes it, and what revision surgery actually involves.

The Hard Truth About Knee Replacement Longevity

When a primary knee replacement goes perfectly — good planning, precise placement, right implant for the patient — the result should last 20 years or more. Many of my patients are still walking comfortably on knees I replaced 12, 14, 15 years ago.

But implants are not permanent. They are engineered components operating inside a biological environment that is always changing. Over time, the bond between implant and bone can weaken. The plastic spacer between the metal components gradually wears. Ligament balance can shift. And in some cases, the placement of the original implant — even a millimetre or two off from optimal — accelerates all of this.

When I see revision cases from other centres, the most common finding is not catastrophic failure. It is slow, progressive deterioration driven by imprecision in the original surgery. This is one reason I am so committed to robotic-assisted planning for primary knee replacement — because I have seen, repeatedly, what the alternative looks like.

Warning Signs I Take Seriously

I tell every knee replacement patient at COJRI: if your knee was good for a period of time and then changed — or if it never really settled properly after surgery — do not accept that as normal. Come in. Let me look at it.

Here are the specific signs that, in my clinical experience, warrant urgent assessment:

Pain Returning After a Period of Relief

This is the most significant flag. A well-functioning knee replacement should not cause increasing pain over time. If your knee was comfortable for two or three years and pain has gradually returned — particularly pain with weight-bearing, pain at night, or pain that is worse with activity — something has changed structurally. Implant loosening or progressive wear are the most common culprits.

Instability and Giving Way

A knee replacement should feel stable. If yours buckles when you put weight through it, or feels unpredictable going down stairs, the ligament balance around the implant may have been compromised — either from the original surgery or from subsequent changes in the surrounding soft tissue.

Swelling That Persists or Returns

Some swelling in the months after surgery is entirely normal. Swelling that returns after it had settled — particularly if accompanied by warmth and any redness — raises the question of low-grade infection. Periprosthetic joint infection (PJI) is one of the most serious complications of knee replacement, and it requires a very different treatment path from mechanical failure.

A Significant Stiffness That Does Not Improve

Knees that remain persistently stiff — unable to bend beyond 80 or 90 degrees months after surgery — may have developed excessive scar tissue (arthrofibrosis), or may have been placed in a position that mechanically limits flexion. Both are addressable, but early intervention gives better outcomes than waiting.

What I Do When I Suspect Implant Failure

My diagnostic approach starts with a careful history. When did the problem begin? Was there any precipitating event — a fall, an infection elsewhere in the body, dental work? How has the knee changed over time?

I then take standing X-rays in multiple projections. Changes in implant position, gaps between the implant and bone (called radiolucent lines), and any visible bone loss are all meaningful findings. Blood tests — specifically CRP and ESR — tell me whether there is an inflammatory or infectious process active. If infection is on the table, I will aspirate the knee: draw a small fluid sample with a needle and send it for laboratory analysis. This is the most reliable way to confirm or exclude PJI before committing to a treatment plan.

What Revision Surgery Involves

Revision knee replacement is significantly more demanding than primary replacement — both technically and for the patient. I want to be honest about this.

In most revision cases, I remove some or all of the existing implant components. If there is bone loss around the implant — which is common with loosening or infection — I need to address that, sometimes with bone graft or specialised augment components. The revision implant itself is usually more complex than the primary: more constrained, with longer fixation stems to anchor in healthy bone above and below the joint.

For infection cases, I typically stage the revision: first surgery removes the implant and places an antibiotic spacer, followed by 6–8 weeks of targeted antibiotics, and then a second surgery implants the new prosthesis once the infection is confirmed clear. This is the two-stage revision protocol, and it gives the best long-term results for established joint infection.

Recovery After Revision Knee Replacement

Recovery from revision surgery is longer than from a primary procedure — typically 6 to 12 months before full functional restoration. This is because the bone and soft tissue have already been through one surgical episode, and the reconstruction involved in revision work is more extensive.

I am also honest with my patients about expectations: revision surgery aims to restore comfort and function, but it rarely returns the knee to the state it would have been in with a perfectly placed primary implant. This is another reason I feel strongly about getting the primary surgery right the first time.

Frequently Asked Questions About Revision Knee Surgery

How do I know if my knee replacement has failed?

The clearest signs are pain returning after a period of good function, new instability, persistent or returning swelling, and worsening stiffness. Do not wait for your next annual appointment if you notice these. Come in promptly.

Can a revision knee replacement be done if my original surgery was at a different hospital?

Yes. A significant number of my revision patients had their primary surgery elsewhere — in Chandigarh, Mohali, Panchkula, or further afield. I review all available records and imaging and plan the revision based on what I find, regardless of where the first procedure was done.

Is revision knee surgery available in Chandigarh?

Yes. COJRI offers specialist revision knee replacement in Chandigarh with specific expertise in complex cases involving loosening, infection, bone loss, and instability.

What is the success rate of revision knee replacement?

In experienced specialist hands, revision knee replacement has good long-term outcomes — though success rates are lower than for primary replacement due to the inherent complexity. The most important variables are the reason for revision, the degree of bone loss, and whether infection has been definitively managed before reimplantation.

A Direct Message to Patients Living With a Failing Knee Replacement

If you are reading this because your knee is not right and you have been told to wait, or told that this is just how it is going to be — please seek a second opinion. Not all problems after knee replacement require revision surgery; some have simpler solutions. But some problems, if left unaddressed, become considerably harder to correct over time.

I have a dedicated revision and complex joint replacement service at COJRI for patients across Chandigarh, Mohali, and Panchkula. Book an assessment today — I will give you an honest, thorough opinion on what your knee needs.