Primary Focus
Conservative Path
Symptom management, quad strength, offloading
Interventional Path
Structural correction, joint resurfacing or repair
Treatments
Revision Knee Replacement
Surgical replacement of a worn, loose, or infected previous knee replacement implant.
On this page
Overview
Revision knee replacement is a specialized procedure to replace a previous implant. This page covers indications, complexity, and recovery.
Revision knee replacement is a complex surgical procedure where some or all of the parts of a previous artificial knee joint are removed and replaced with new, specialized revision implants. This is performed due to implant wear, loosening, instability, fracture, or chronic infection. Wording is cautious: revision surgery is more complex than primary replacement.
This information is for general patient education and does not replace an individual clinical assessment. Suitability and outcomes depend on joint condition and physical health.
Clinical Overview Illustration
What does this treatment involve?
Typical clinical stages of this treatment pathway include:
1Comprehensive pre-op planning, infection screening, and imaging
2Making an incision (often through the previous scar) and exposing the joint
3Carefully removing the old metal and plastic components from the bone
4Preparing the remaining bone surfaces, which may require bone grafts or metal augments
5Inserting and cementing specialized, longer-stemmed revision implants
6Checking stability, alignment, and range of movement
7Closing the incision and applying compression dressings
Suitability
Suitability depends entirely on an individual clinical examination, diagnostic imaging, medical history, and personal activity goals.
Who may benefit?
- Patients with aseptic loosening (implants coming loose from the bone)
- Individuals with chronic prosthetic joint infection failing non-surgical treatment
- Patients with significant joint instability or periprosthetic fractures
When might it not be suitable?
- Unexplained knee pain where the primary implant is structurally sound and stable
- Patients with severe medical conditions making major, prolonged surgery unsafe
Alternatives
Alternative treatment pathways that may be considered depending on clinical severity:
Non-surgical symptom management (medication, brace support)Explore Option >
Long-term suppressive antibiotic therapy (for infected joints in unfit patients)Explore Option >
Risks
As with any clinical intervention, risks and complications differ between patients. Suitability and risk profiles are discussed in detail during consultation. General risks associated with this procedure include:
Higher risk of infection or recurrence of infection
Higher risk of implant loosening or failure compared to primary replacement
Loss of bone stock or fracture of the surrounding bones during surgery
Persistent stiffness, pain, or leg length discrepancies
Recovery & Rehabilitation
Post-treatment rehabilitation and timelines are key to restoring joint health. We do not provide guaranteed recovery times.
Immediate Recovery
- Mobilisation begins quickly, but weight-bearing restrictions may apply depending on bone quality
- Hospital stay is typically 3 to 5 days
- Rehabilitation is longer and more gradual than primary replacement, typically 6-12 months
Rehabilitation Pathway
- Intensive physiotherapy to restore range of movement and rebuild leg strength
- Close monitoring of wound healing and infection parameters
Rehabilitation Milestones
Revision Knee Replacement Recovery Timeline
Typical phase-based progression and return to functional activity guidelines.
1
Phase 1 (Weeks 1-2)
Initial Mobility & Healing
Primary Focus:Control swelling, achieve full extension, activate key stabilizing muscles.
- Use crutches or support frame for safety
- Perform gentle range of motion exercises (0-90° flexion)
- Regular elevation and icing to manage inflammatory response
Weight BearingWeight-bearing as tolerated with aids
Driving StatusNot permitted
2
Phase 2 (Weeks 3-6)
Gait Normalisation & Range
Primary Focus:Restore normal walking gait, progress knee bending beyond 90°, and increase standing load.
- Gradually wean off walking aids as gait stabilizes
- Introduce closed-chain exercises (squats, calf raises)
- Increase active movement and daily walking distances
Weight BearingFull weight-bearing
Driving StatusPermitted once emergency stop is safe (approx. 6 weeks)
3
Phase 3 (Weeks 6-12+)
Strengthening & Functional Return
Primary Focus:Restore leg strength, balance, and return to light work/recreation.
- Progress resistance training (leg press, cycling)
- Incorporate balance and coordination drills
- Gradual return to work, driving, and low-impact activity
Weight BearingUnrestricted
Driving StatusPermitted
Important Clinical AdviceRecovery timelines are indicative. Individual rehabilitation progression depends on surgical findings, tissue quality, and the specific guidance of your consultant orthopaedic surgeon and physiotherapist.
Surgical Recovery Resources
As this is a surgical procedure, you may find our recovery resources helpful. These explain how to prepare and what to expect:
Clinical Pathway Map
Staged treatment and recovery journey.
Staged Clinical Pathway
Phased Rehabilitation & Recovery Pathway
Patient Education Pathway: This pathway diagram is for patient educational purposes only. It is not a diagnostic, triage, or clinical decision-making tool. Individual care options are determined dynamically following consultation.
Anatomy Comparison
Management Strategy Comparison
Comparing conservative treatment with active intervention options.
Conservative Path
Conservative PathClinical Reference
Conservative PathClinical ReferenceInterventional Path (Intervention Options)
Interventional PathClinical Reference
Interventional PathClinical ReferenceTimeframe
Conservative Path
Gradual ongoing adaptation over 3-6 months
Interventional Path
Structured acute healing followed by targeted rehab
Expected Outcome
Conservative Path
Improved function and pain control, preserved anatomy
Interventional Path
Restored mechanical stability, reconstructed tissue
| Anatomical Feature | Conservative Path | Interventional Path |
|---|---|---|
| Primary Focus | Symptom management, quad strength, offloading | Structural correction, joint resurfacing or repair |
| Timeframe | Gradual ongoing adaptation over 3-6 months | Structured acute healing followed by targeted rehab |
| Expected Outcome | Improved function and pain control, preserved anatomy | Restored mechanical stability, reconstructed tissue |
Frequently Asked Questions
Common reasons include mechanical wear of the plastic spacer, loosening of the metal parts from the bone over time, joint instability, or chronic low-grade infection.
It is a highly specialized procedure that requires careful planning, custom implants, and a skilled surgeon, as there is often less bone stock to work with than in a primary surgery.
Awaiting Clinical Review
This page is in draft and has not yet been formally reviewed by our clinical team. Content may change following clinical review.
Would you like to discuss your treatment options?
A consultation can help clarify the cause of your symptoms and discuss appropriate treatment options.
Face-to-face appointments are arranged through the reception team at the chosen clinic. Video consultations use Google Calendar where available.
Continue Your Knee Journey
Explore Recovery→Next Step: Recovery & Rehabilitation
Understand recovery milestones, physical therapy timelines, and guidelines for returning to daily activities, driving, work, or sports safely.
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Medical Disclaimer
This website provides educational and general information about knee symptoms, conditions, and treatments. The content is for informational purposes only and does not constitute medical advice, diagnosis, or a treatment plan. It should not be used as a substitute for a professional consultation, examination, or clinical decision-making by a qualified orthopaedic specialist.
If you are experiencing symptoms or are concerned about a knee problem, please arrange a clinical consultation. If you have urgent symptoms, severe pain, or are unable to put weight on your leg, please read our urgent advice guidance or contact emergency services immediately (dial 999 or NHS 111).