Revision knee replacement is an operation to replace or repair a knee replacement that has worn out, loosened, become infected, or is causing persistent problems. It is more complex than a primary knee replacement.
The previous incision is reopened. The failed components are removed, which may require cutting bone or cement. Bone defects are assessed and reconstructed with augments, bone graft, or metal wedges. New, larger revision implants are inserted. The operation is longer and more complex, typically two to three hours or more.
Revision may be needed for implant loosening, wear, persistent pain, instability, infection, or periprosthetic fracture.
Observation, pain management, physiotherapy, and bracing may provide temporary relief. Once the implant has failed, revision surgery is usually the definitive treatment.
Thorough pre-assessment with additional imaging (CT scan). If infection is suspected, joint aspiration and blood tests are performed. Optimisation of health is particularly important.
The aim is to restore a stable, functional, pain-free knee. Outcomes are generally good but less predictable than primary replacement. Recovery is slower.
Recovery takes longer than primary knee replacement.
More common than after primary surgery.
Greater blood loss than primary surgery. Transfusion may be required.
Higher risk than primary surgery, approximately 3–5%.
The revision knee may be less stable than a primary replacement.
Increased risk due to bone loss.
Scar tissue increases the difficulty.
Revision implants may not last as long as primary implants.
General or spinal anaesthesia. Planning for longer surgery and potential blood loss.
Hospital stay of three to seven days. Restricted weight-bearing may apply. Physiotherapy essential. Full recovery takes six to twelve months.
Close follow-up at two weeks, six weeks, three months, and one year. Long-term monitoring.
Yes, it carries higher complication rates than primary surgery but remains a well-established procedure.
Typically 10–15 years, depending on bone quality and activity level.