Implant osseux expansible de chirurgie orthopédique humaine, système orthopédique et procédé de fabrication de l'implant

An expandable bone implant (1) for human orthopaedic surgery for restoring the volume and/or geometry of a bone by expansion between a folded configuration and a deployed configuration, said implant comprising a central shaft (3) and extending along a longitudinal axis (L) between a proximal end (11) adapted to cooperate with an implantation instrument (A) for holding the implant and a distal end (12) intended to be first inserted into the bone, at least two faces of the implant each comprising at least one flange (13, 14, 15) for contact with bone tissue, each of the flanges being supported by at least two support arms (131, 141, 151) each, by means of a hinge on the central shaft (3) and a hinge under the respective flange (13, 14, 15) of each of said support arms (131, 141, 151);

• wherein:
• an expansion ring or socket (20) is arranged on the same axis as said central shaft (3);
• at least two expansion arms (132, 142, 152) each have a hinge connecting them to one of the ends of one of the flanges (13, 14, 15) and a hinge connecting them to said expansion ring or socket (20);
• said expansion ring or socket (20) and the proximal end of the central shaft (3) are able to be actuated in order to cause separation between said socket (3) and said central shaft (3), applying traction to the flanges (13, 14, 15), by means of the expansion arms (132, 142, 152), thereby causing said support arms (131, 141, 151) to pivot, causing the flanges (13, 14, 15) to move away from the central shaft (3), so as to result in controlled expansion of the implant (1) between said folded configuration and said deployed configuration.