Endoprosthesis System with Cortical Clamping

A bone clamp for coupling an intramedullary stem to a bone in which the intramedullary stem is received, the bone clamp comprising:

• a collet comprising:
• a main body defining a proximal end portion defining a proximal end of the collet, the main body forming an internal channel configured to receive at least a portion of the bone and at least a portion of the intramedullary stem therethrough, the main body having a plurality of openings formed in a side wall thereof, the openings being spaced apart from each other in a circumferential direction of the main body, and
• a plurality of legs, each of the plurality of legs having a distal portion having an inner surface configured to contact the bone, and a proximal portion having a protrusion, each protrusion of the plurality of legs being configured to be received within any one of the openings formed in the side wall of the main body to couple corresponding leg to the main body;
• a bushing configured to be received within the proximal end portion of the main body, the bushing having a longitudinal channel configured to receive at least a portion of the intramedullary stem therethrough, the bushing being generally annular with a gap formed between two walls of the bushing that confront each other;
• and
• a cap having internal threading that is complementary to external threading on the proximal end portion of the main body, the cap having a longitudinal channel configured to receive at least a portion of the intramedullary stem therethrough, the cap having a distal face configured to contact a proximal face of the bushing, the cap being configured to be received around the proximal end portion of the main body such that such that rotation of the cap relative to the main body translates the cap distally relative to the main body to compress the bushing to reduce a size of the gap of the bushing.