Expandabl 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 extending along a longitudinal axis (L) between a proximal end (11) connectable with an implantation instrument (A) for holding the implant and a distal end (12) intended to be inserted first into the bone, at least two faces, for example an upper and a lower face, of the implant each comprising a flange (13, 14) for contact with bone tissue, each of the flanges comprising a central portion (130, 140) connected, by means of at least one hinge, to at least one pair of support arms (131, 141) each oriented in opposite directions within each pair, one arm of each pair being connected by a hinge to the distal end (11) while the other arm is connected by a hinge to the proximal end (12), the implant (1) being able to receive or comprising a central shaft (3) extending through a sliding sleeve at the proximal end (11) as far as a traction ring or socket at the distal end (12) where it is able to transmit traction, when actuated by an instrument (A), to the distal end (12) in order to allow it to move closer to the proximal end (11), causing the support arms (131, 141) to pivot, thus causing the flanges (13, 14) to move away from one another and, consequently, the expansion of the implant between the folded configuration and the deployed configuration,

• wherein:
• at least two other faces of the implant, between those comprising the flanges, are covered with at least one sheet (10) per face, said sheet being made of a biocompatible metal alloy and secured in a fluidtight manner to the central portions (130, 140) under the flanges, to lateral faces of the arms (131, 141) and to lateral faces of the proximal end (11) and of the distal end (12),
• said sheet (10) is plastically deformable in order to allow the implant to expand and has, at least in the folded configuration, a plurality of antiform folds (101), referred to as convex, and synform folds (102), referred to as concave, said folds lying on top of one another in the folded configuration, the total surface area of said sheet being greater than or equal to the lateral surface area of the implant in the deployed configuration so as to form a fluidtight compartment that can receive a fluid inside the cavity obtained by the expansion of the implant.