Patellofemoral resurfacing is a partial knee replacement involving the areas of both patella and femur where they come into contact.

trochlear implant

The femoral component - also called a trochlear implant.

cut for patellar button

Patella to show cut line. The lower half is discarded.

patella with patellar button implant

Polyethylene button cemented onto undersurface of cut patella.


Materials for resurfacing

The femur component is usually metal, while the patellar component is usually ultrahigh molecular weight polyethylene. The polyethylene component for the patella has small 'feet' that are cemented into holes drilled into the undersurface of the cut bone.

Unicompartmental knee replacement
Patellofemoral replacement