Expandable bone implant for veterinary orthopaedic surgery, orthopaedic system and method for manufacturing the implant

An expandable bone implant (1) for veterinary 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 hollow body extending along a longitudinal axis (L) between a proximal end (11) connectable to an implantation instrument (A) for holding the implant (1) and a distal end (12) intended to be first inserted into the bone, wherein:

• the wall of said hollow body is formed by a sheet (10) made of a biocompatible metal alloy, closed on itself in a sealed manner, between said proximal (11) and distal (12) ends;
• said sheet (10) has, at least in the folded configuration, a plurality of pairs of folds, each of the pairs comprising an antiform fold (101), referred to as convex, and a synform fold (102), referred to as concave, said folds lying on top of each other in the folded configuration so that the surfaces present between each of said convex and concave folds are rolled around the longitudinal axis (L);
• said proximal end (11) comprises a ring secured, in a sealed manner, to the lying-down and rolled folds of said sheet (10) over the entire periphery of the proximal end (11), the opening passing through the ring forming an entrance to the inside of the hollow body of the implant (1);
• said distal end (12) comprises a cup closing the distal end (12) and secured, in a sealed manner, to the lying-down and rolled folds of said sheet (10) over the entire periphery of the distal end of said hollow body;
• said sheet (10) being plastically deformable to allow expansion of the implant from the folded configuration to the deployed configuration, when a fluid is injected into the implant (1).