When a knee replacement no longer functions correctly, revision surgery is often required. During this procedure, a surgeon replaces the old device with a new one.
A revision procedure is typically more complex than the original knee replacement surgery because the surgeon must remove the original implant, which would have grown into the existing bone.
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Procedure takes 2-3 hours & is performed under general anaesthesia. This surgery is performed in two steps.
- In the first step: the old prosthesis is removed very carefully preserve as much bone as possible. A polyethylene and cement block known as a spacer is inserted, that has been treated with antibiotics
- In the second procedure: Spacer is removed, knee is reshaped and resurfaced, and then a new knee device is implanted. The two procedures usually take place about six weeks apart.
- If a bone graft is required, the surgeon will either take bone from another part of the body or use bone from a donor, usually obtained through a bone bank.
- The surgeon might also install metal pieces such as wedges, wires, or screws to reinforce the bone for the implant or fasten the implant to the bone.
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After the procedure
The length of recovery after revision knee surgery varies in comparison to a patient's first knee replacement. Patient may need a walker, cane, or crutches for the first few days or weeks until he / she is comfortable enough to walk without assistance.
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