Laminoplasty implant, in particular for cervical laminoplasty

Laminoplasty implant in particular for cervical laminoplasty, adapted to connect the two portions of the lamina of a vertebra resulting from an ablation of the central zone of said lamina, comprising:

• a body having a first end intended to be connected to a first portion of lamina and a second end intended to be connected to the second portion of lamina, said body having, in its implantation position, an outer side, an inner side, an upper side and a lower side;
• a first direction extends from the outer side toward the inner side of said body;
• and
• two anchoring portions to said portions of lamina, one of which is connected to said first end and the other of which is connected to said second end, each anchoring portion being in the shape of a U, i.e. comprising an inner side wall intended to come against an inner side of the corresponding portion of lamina, an outer side wall intended to come against an outer side of said portion of lamina, and an intermediate wall connecting said inner side wall to said outer side wall;
• a second direction (d2) extends from said intermediate wall, substantially perpendicularly thereto, toward the opening of the U defined between the free end edges of said inner side wall and said outer side wall;
• wherein
• said intermediate wall of each anchor portion is situated toward the upper side of the body of the implant, and said second direction is substantially perpendicular to said first direction, said inner, outer and intermediate side walls thus being arranged relative to said body so that, when the body is arranged in said implantation position, the direction of engagement of these walls on the portions of lamina is parallel to the cranial-caudal direction of the vertebral column, i.e. the general longitudinal direction of said vertebral column, and
• said central body comprises mounting means allowing one or more grafts to be mounted thereon that can extend from one resected surface of a portion of lamina to the resected surface of the other portion of lamina, so that the ends of that or those grafts can be situated, after placement, in the immediate vicinity of said resected surfaces.