Revision Knee Replacement
Revision knee replacement removes and replaces a failed or worn primary knee implant. While modern knee replacements last 20+ years for most patients, they can fail from implant wear, loosening, infection, instability, or fracture — requiring a more complex second surgery to restore function. Revision surgery is significantly more involved than primary replacement, often requiring specialized implants with longer stems to achieve stable fixation into bone that has already been surgically altered.
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Who Needs Revision Knee Replacement?
Revision is indicated when a primary knee replacement fails. The most common reasons are mechanical loosening (the implant shifts within the bone), polyethylene wear, periprosthetic joint infection, instability, stiffness, or fracture around the implant. Patients typically present with pain that returns after years of a pain-free interval, swelling, or mechanical symptoms. Thorough evaluation — including aspiration, blood markers for infection, X-rays, and sometimes CT scan — is done to identify the failure mode before planning surgery.
What to Expect
Recovery Timeline
Hospital stay. Early mobilization with physical therapy, walking with a walker.
Home or inpatient rehab. Walker or crutches. Wound care and swelling management.
Transition to cane. Outpatient physical therapy 2-3 times weekly.
Return to most daily activities. Driving resumes when off pain medication.
Continued strength and mobility gains. Walking for fitness and low-impact activity.
Maximum recovery. Outcomes are generally good but slightly less predictable than primary replacement.
Risks & Complications
- Higher complication rate than primary replacement
- Persistent pain or stiffness
- Infection (higher rate than primary — 2-5%)
- Implant re-failure
- Extensor mechanism injury (quadriceps tendon or patella problems)
- Nerve or vessel injury
- Bone loss making future revision more difficult
Frequently Asked Questions
How long does a revision knee replacement last?
Revision implants have lower longevity than primary replacements. About 70-80% of revision knee replacements are still functioning at 10 years. A second revision is more difficult than the first because of progressive bone loss with each surgery — getting it right the first time matters.
Is revision knee replacement more painful than the original?
Recovery is generally harder than primary replacement — longer, more swelling, and slower functional gains. The surgery is more complex, involves more bone work, and the implants are larger. Most patients do get meaningful pain relief, but expectations should be set at a slightly lower bar than a first-time replacement.
How do I know if my knee replacement is failing?
The classic sign is pain returning after a period of good function — especially if accompanied by swelling or a feeling that the knee is loose. A new-onset fever with knee pain warrants urgent evaluation to rule out infection. X-rays and blood tests are the first step; see a revision specialist rather than returning to your original surgeon if the problem seems serious.
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Search surgeonsEstimated Cost
$40,000 - $80,000 (before insurance), significantly more than primary replacement due to implant complexity and longer OR time. Covered by Medicare and most insurance plans.
Full cost breakdownRelated Specialty
Knee Specialists →Other Procedures
This information is for educational purposes only. Costs are estimates and vary by location, surgeon, and insurance. Always consult a qualified healthcare provider.