Apparatus for reconstructing a joint of the sort comprising a first bone having a first articular surface and a second bone having a second articular surface, wherein the first articular surface and the second articular surface engage one another, the apparatus comprising:a prosthesis for replacing at least a portion of the first articular surface of the first bone, the prosthesis comprising: a prosthesis plate for positioning against an outside surface of the first bone anda prosthesis body connected to the prosthesis plate, the prosthesis body comprising a first prosthetic articular surface which generally matches the shape and size of the first articular surface.
