Intramedullary implant for transverse osteotomy

A surgical instrumentation including a tool suitable for preparing the attachment of an implant on a bone,

• said implant including:
• a plate having a flat side face shaped to be fixed on the second bone fragment and including at least two threaded holes passing through the plate between a lateral face and an opposite medial face, each of said at least two threaded holes having a housing opening onto the medial face and adapted to receive the head of an anchoring screw, wherein the at least two threaded holes extend in a direction normal to the lateral face,
• a keel shaped to be inserted into a medullary canal of the first bone fragment, the keel being a solid of revolution centered on a longitudinal axis, and said longitudinal axis being parallel to the lateral face of the plate, and
• an intermediate portion, connecting said plate to said keel,
• wherein the plate includes a securing device making it possible to releasably secure said implant to a tool adapted to prepare the attachment of said implant on the metatarsal, the securing device comprising an indexing hole and a threaded hole formed in the plate and opening onto the medial face so as to index the position of the implant relative to the tool;
• and
• said tool including:
• a frame, having a distal part and a proximal part,
• a movable body, having a lower face and an upper opposite face, including a complementary securing device comprising an indexing pin adapted to cooperate with the securing device of the plate so as to fix the tool on the implant, said movable body being displaceable in translation relative to the frame along a translation axis parallel to the longitudinal axis of the implant when the tool is fixed on the implant, and
• a hooking device making it possible to fix said frame on the first bone fragment to which the implant is also fixed.