What is revision knee replacement?
Revision knee replacement is surgery to remove a previous knee implant and replace it with a new one. Although modern replacements commonly last twenty years or more, an implant can eventually wear, loosen, or develop a problem that needs addressing.
It is a bigger operation than the first (primary) replacement, because the old components must be carefully removed and any lost bone reconstructed. With careful planning, it reliably restores a stable, comfortable knee.
Why a revision is needed
Revision is considered when a replaced knee becomes painful, unstable or unreliable. Common reasons include:
- Wear or loosening of the implant over time.
- Instability or stiffness affecting function.
- Infection around the implant.
- Fracture of the bone near the components.
How the procedure works
After detailed planning — including imaging and, where infection is suspected, tests to confirm it — the old components are carefully removed. Any bone deficiency is rebuilt with augments, bone graft or specialised implants, and new, often more constrained, components are fitted to restore stability and alignment.
Where infection is the cause, revision is often done in two stages: the implant is removed and the infection treated first, with a new implant fitted at a second operation once the infection has cleared.
Recovery timeline
Up and moving
Standing and first steps with support, usually within a day of surgery.
Walking & motion
Progress from frame to sticks to independent walking; daily exercises restore bend and strength.
Independence
Return to most daily activities, with progress a little more gradual than after a primary replacement.
Full benefit
Strength and confidence continue to build over the first year.
Risks & outcomes
Revision knee replacement reliably relieves pain and restores function, though recovery is generally slower than after a first replacement. As a larger operation it carries a somewhat higher risk profile — including infection, stiffness, blood clots and the need for further surgery — all minimised through careful planning, prophylaxis and rehabilitation.
It follows the same path but is usually a little slower, as the operation is more involved and the bone needs to recover.
Revision implants are durable; longevity depends on the reason for revision, bone quality and activity, and is discussed with you individually.