Abstract: An interspinous implant includes an implant body extending along a longitudinal axis and having, in succession: a rear part having a rear end, and a central part shaped to extend between two spinous processes of two adjacent vertebrae, the central part extending the rear part. The implant further includes a front part extending the central part, in the opposite direction from the rear part, and tapering down to a front end of streamlined shape. The implant body has an anterior face intended to face toward the vertebrae and in which there is formed an anterior groove of curvilinear shape, extending from the rear end as far as the front end in a curvilinear direction, to accept at least a portion of an implantation prong of an implantation ancillary.

Abstract: This implant comprises a substantially U-shaped body having an elastic flexibility in the area of its central portion, and two pairs of brackets projecting from the outer face of the two branches of the body, these brackets defining stirrups for receiving the spinous processes of the vertebrae and comprising means permitting them to be fixed to the processes.

Abstract: A vertebral osteosynthesis device employs outside faces of lateral walls of each hooking element which are inclined toward each other such that they converge from the side opposite hooking elements designed to be attached to the bone, while a gripping element in the shape of a clamp has side arms with inside faces inclined at slopes that match those of outside faces of lateral walls. At least two gripping means are disposed beyond the lateral walls and are provided to move the gripping element such that the inside faces of its lateral arms abut the lateral walls, bringing them toward each other and sliding on them upon gripping, to bring the lateral walls closer together to lock each hooking element onto a support rod.