US Patent 8080059 Surgically implantable prosthesis with active component

A prosthesis for surgical implantation into a knee joint compartment between a femoral condyle and its corresponding tibial plateau includes a body including a bottom face, an opposed top face, and a peripheral edge extending between the top and bottom faces. The body has a first portion and at least one second portion, wherein at least one second portion is configured to store and release at least one active component into the knee joint compartment without degradation of the mechanical function of the prosthesis.