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.
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 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.
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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