This procedure replaces worn artificial knee parts and damaged bone with metal and plastic components.
A vertical incision is made in the knee to expose the patella (kneecap) and the ligaments that connect it to the tibia and fibula. The patella is pushed aside to allow the surgeon access to the joint.
Femur Component Removed
The old component is removed from the femur (thigh bone).
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 fit. The surgeon may decide to use wedges cemented inside the new component.
Femur Component Attached
The new component is attached to the end of the femur using bone cement.
Tibia Component Removed
The old component is removed from the tibia.
The tibia end is reshaped and its center is hollowed so a new metal component can be attached.
Lost Bone Replaced
It may be necessary to replace lost bone with a metal wedge. Or, morselized bone grafts may be used instead. Unlike total knee replacement surgery, this less-invasive procedure replaces only the damaged or arthritic parts of the knee.
Damaged Bone Removed
Part of the damaged femur is removed so the surgeon can access the damaged portion of the tibia.
Damaged Meniscus Removed
Damaged meniscus is removed from the joint. Some bone is also removed to make room for the new tibial plastic component.
Tibial Component Attached
Cement is added to the newly prepared area. The plastic tibial component is pressed into place.
A small amount of bone is removed from the damaged, arthritic area of the femoral condyle. An opening is created for the metal femoral component.
Femoral Component Attached
The area is filled with bone cement. The metal femoral component is pressed into place.
End of Procedure
The new parts of the knee joint are tested by flexing and extending the knee through its range of motion.