Revision Knee with Tibial Tubercle Osteotomy

Overview
This procedure replaces worn artificial knee parts and damaged bone with new, specially-made metal and plastic components.

Patella Moved
The surgeon creates cuts in the tibia (the lower leg bone) freeing the ligament that anchors the patella (the kneecap) to the tibia. The patella is moved aside during the surgery.

Old Component Removed
The old component is removed from the femur (the thigh bone).

Femur Reshaped
The femur is reshaped to receive a new component.

Lost Bone Replaced
Bone grafts may be needed to replace lost bone and improve the implant's fit. Or, the doctor may cement wedges inside the new component.

Femoral Component Attached
Bone cement is reapplied to the end of the femur, and a new femoral component is attached.

Tibial Component Removed
Now, the surgeon focuses on the tibia. The old tibial component is removed.

Tibia Reshaped
The end of the tibia is reshaped and its center is hollowed out so a new metal component can be attached.

Lost Bone Replaced
The surgeon may need to replace lost bone with a metal wedge (shown here), or with morselized bone grafts.

Tibial Component Attached
The surgeon applies bone cement to the prepared end of the tibia. The new tibia component and wedge (if used) are secured.

Plastic Plate Attached
A plastic plate is attached to the metal tibial component. The plate will support the body's weight and allow the femur to move over the tibia.

Patella Resurfaced
The patella is resurfaced. A new plastic component is attached with bone cement.

End Of Procedure
The patella is placed back into its normal position. The ligament is reattached to the tibia, completing the operation.