Abstract: Drive shaft for interchangeable reaming heads intended for surgical use, in particular a reaming head used prior to the positioning of an intramedullary nail in the femur or in a long bone. The shaft has a rod (20) made from composite material, e.g. carbon and/or glass fiber reinforced polymer, and a connection element (35) for the coupling of an interchangeable reaming head. One portion (32) of said connection element (35) is inserted into a cavity in the first end (21) of said rod (20). The inventive shaft has a constant diameter, a smooth external surface and a low cost such that it can be disposed of after use.

Abstract: The invention relates to a surgical tool (10) for reaming the diaphyseal canal of long bones, in particular of the femur, humerus, or tibia, in order to insert an intramedullary rod. The modular reaming head includes: a central core (60) and a peripheral bushing (24) that is coaxial to said central core (60) and connected via a plurality of vanes (41a-41e) connecting a front surface (12) of the tool (10) to a rear surface (11) of the tool (10), and teeth (26a-26e) on the outer surface of said peripheral bushing (24). The openings allow material to pass toward the rear when the tool advances within the diaphyseal canal, minimizing pressure and friction, resulting in a positive effect on the rate of clinical complications. The tool is preferably made using the metal injection molding (MIM) technique in order to reduce production costs and enable the one-time use thereof. The reaming head of the invention can be perfectly combined with composite or metal drive shafts.

Abstract: Surgical implant for treating fractures of long bones, notably of the femur, having an intramedullary section (52) of elongated shape, adapted for being inserted into the medullary cavity (37), an extramedullary section (56) substantially parallel to the intramedullary section (52), a deformable curved loop (57) connecting the intramedullary section (52) to the extramedullary section (56), an inclined screw (61) traversing said intramedullary section (52) and said extramedullary section (56). By deforming the loop (57), a continuous adjustment of the angle (?) of the cephalic screw (61) and thus an optimal adaptation of the implant to the individual anatomy can be achieved. Thanks to its geometry, this implant induces a protection of the greater trochanter and limits the mechanical loads between the cephalic screw (61) and the rest of the implant.