Revision knee replacement is a surgical procedure that essentially replaces an existing knee replacement that has worn out or loosened itself, which typically happens 10 to 15 years after the first operation.

The knee prosthesis can be either resurfaced or replaced depending on the extent of the damage, though it’s usually replaced. The original prosthesis, dead bone and tissue are removed before inserting a new prosthesis. Revision knee replacement is basically the same procedure as an original knee replacement but there are more potential complications due to weaker bones and the increased likelihood that the new prosthesis will eventually loosen.

Procedure information
The surgical procedure takes about 2 hours and is generally done using a general anesthetic, so patients are asleep throughout the entire operation. The surgeon will remove the existing knee prosthesis and examine the surrounding bone and tissue for damage. If the bones around the knee joint have weakened, which often happens, a bone graft may be necessary to rebuild the deteriorated areas. The surfaces of the end of the thighbone and kneecap are reshaped to accommodate the new prosthesis, which is then fitted into place over both the bones. After the new prosthesis has been tested to ensure everything moves smoothly, the surgeon closes the wound and stitches it up.

Recovery time
The day after the operation, a physiotherapist will begin a regime of exercise to help rehabilitate the knee. Most patients stay in hospital for 5 to 10 days before returning home. Crutches or a cane will be necessary for the first few weeks, but patients who stick to the exercise program will see a steady increase in strength. Many routine household activities will be difficult at first, but most patients return to work after 6 weeks. The knee will slowly continue to improve over the course of 6 months until reaching full strength.