a reservoir 130 which communicates with the joint space 120 via a plurality of grooves 132 in the preferred embodiment one or more grooves 132 extend in the medial lateral direction and intersect the medial and lateral external surface 134 of femoral component 102 see fig5 consequently joint fluid can enter through the medial and lateral openings of grooves 132 and communicate with the reservoir 130 as described above reservoir 130 includes the bioresorbable polymer having an analgesic or antibiotic or other therapeutic agent therein tibial component 108 also includes a reservoir 140 in stem 110 the reservoir 140 has an open end 142 which leads to a passage 144 which in turn leads to the joint space 120 in the preferred embodiment the passageway is formed in the polyethylene bearing component 146 referring to fig7 there is shown the cross sectional view of the knee joint prosthesis 100 showing the analgesic or antibiotic being discharged into the joint cavity 120 via passageways 132 and 140 referring to fig8 there is shown the knee prosthesis 100 with the bioresorbable polymer partially resorbed referring to fig6 there is shown an alternate embodiment for location of the polymer containing the antibiotic or analgesic or other therapeutic agent in this embodiment the polymer is molded around the outside of for example a tibial baseplate 150 such as at 152 the molded polymer including the therapeutic agent may extend several millimeters beyond the outer circumferential edge of the baseplate so that the therapeutic agent is released into the joint space as a result of the movement of the water component body fluid into and out of the polymer the bioresorbable polymer also be attached to the implants as a film in this case the film may be.