Phalangeal arthrodesis implant, surgical kit and method for manufacturing same

A medical implant interposable between a first bone and a second bone in order to support the first and second bones substantially joined one to the other, so as to obtain bony of the first and second bones, the implant comprising:

• a middle a first side and a second side;
• at least one first section having a first axis of extension extending from the first side of the middle section designed to be introduced into the first bone having a first means of fixing arranged to hold the implant in the first bone, the first means of fixing comprising a plurality of non coplanar anchoring branches integral with the first section which are intended to create a built-in link between the implant and the first bone, each anchoring branch further having a divergent portion opened outward relative to the central axis and away from the middle section, each anchoring branch further having a convergent portion angled toward the central axis, each anchoring branch each and terminating in a free end;
• and,
• a second section having a second axis of extension extending from the second side of the middle section designed to be introduced into the second bone and having a second means of fixing arranged to hold the implant in the second bone, the second means comprising a plurality of anchoring branches integral with the second section and arranged according to a non-coplanar layout so as to create a built-in link between the implant and the second bone and wherein the anchoring branches are in a splayed configuration prior to implantation so as to have a divergent portion which opens outward relative to the first section as well as a convergent portion turning down the ends substantially in order to facilitate the introduction of the implant in the second bone,
• wherein the conformation of the second means of fixing differs from that of the first means of fixing by its dimensions.

A medical implant interposable between a first bone and a second bone in order to support the first and second bones substantially joined one to the other, so as to obtain bony fusion of the first and second bones, the implant comprising:

• a middle section having a first side and a second side;
• at least one first section having a first axis of extension extending from the first side of the middle section designed to be introduced into the first bone having a first means of fixing arranged to hold the implant in the first bone, the first means of fixing comprising a plurality of non-coplanar anchoring branches integral with the first section which are intended to create a built-in link between the implant and the first bone, each anchoring branch further having a divergent portion opened outward relative to the central axis and away from the middle section, each anchoring branch further having a convergent portion angled toward the central axis, each anchoring branch each and terminating in a free end;
• and,
• a second section having a second axis of extension extending from the second side of the middle section designed to be introduced into the second bone and having a second means of fixing arranged to hold the implant in the second bone, the second means comprising a plurality of anchoring branches integral with the second section and arranged according to a non-coplanar layout so as to create a built-in link between the implant and the second bone and wherein the anchoring branches are in a splayed configuration prior to implantation so as to have a divergent portion which opens outward relative to the first section as well as a convergent portion turning down the ends substantially in order to facilitate the introduction of the implant in the second bone,
• wherein the first and second sections extend substantially according to the first axis of extension and according to the second axis of extension, respectively, and
• wherein the implant is bent such that the angle of deviation of the second axis of extension relative to the first axis of extension is substantially between 10° and 20°.

A surgical kit, comprising:

• a) an implant interposable between a first bone and a second bone in order to support the first and second bones substantially joined one to the other, so as to obtain bony fusion of the first and second bones, the implant comprising at least one first section designed to be introduced into the first bone having a first means of fixing arranged to hold the implant in the first bone, as well as a second section designed to be introduced into the second bone and having a second means of fixing arranged to hold the implant in the second bone,
• wherein the first means of fixing incorporates a plurality of non-coplanar anchoring branches integral with the first section which are intended to create a built-in link between the implant and the first bone,
• wherein anchoring branches, each having a convergent portion having an end and further having a divergent portion, are splayed during manufacture of the implant so that, before installation of the implant in the bones, the divergent portion of each branch opens outward relative to the first section and the ends of the convergent portion substantially turn down in order to facilitate the introduction of the implant into the first bone;
• and
• b) a surgical instrument for bony preparation, the instrument comprising a punch having a plurality of prominent elements arranged so as to mark simultaneously in the bone, by percussion, an imprint comprising a plurality of cavities intended to accommodate the anchoring branches of the implant, the arrangement of the cavities are substantially conjugate to that of the anchoring branches.