a method and system for preparing a bone surface , as by smoothing the surface , in preparation for contacting and / or receiving a prosthetic implant . the smoothing system and method are particularly well suited for use with articulating joints , in which a polymeric biomaterial such as polyurethane is implanted and retained upon one bone surface , in order to provide a corresponding surface for opposing , articulating bone . smoothing condylar bone , for instance , can significantly decrease the friction between a the condylar surface , and particularly one that is itself diseased or damaged , and to remove osteophytes and entheseophytes .