Abstract: The instrumentation comprises a pair of vertebral implants (1) provided with screws (4) for anchorage to two corresponding vertebrae located on each side of a damaged vertebra, and a plate (3) having two end portions (3a) for connection to the two implants, and equipped with serrations (6, 15) for fixing it to the implants. The end portions (3a) of the plate have a rounded periphery and the instrumentation comprises fixing screws (50) having heads (51) which are rounded so that their surface is flush with the surface of the plate when they are anchored in the apertures of the implant and the apertures of the end portion (3a) of the plate. This arrangement ensures that the ends of the plate (3) do not come into contact with the vertebral discs when the angular position of the plate (3) relative to the implants varies, and reduces the overall size of the instrumentation.

Abstract: The instrumentation comprises a pair of vertebral implants (1) provided with screws (4) for anchorage to two corresponding vertebrae located on each side of a damaged vertebra, and a plate (3) having two end portions (3a) for connection to the two implants, and equipped with serration (6, 15) for fixing it to the implants. The end portions (3a) of the plate have a rounded periphery and the instrumentation comprises fixing screws (50) having heads (51) which are rounded so that their surface is flush with the surface of the plate when they are anchored in the apertures of the implant and the apertures of the end portion (3a) of the plate. This arrangement ensures that the ends of the plate (3) do not come into contact with the vertebral discs when the angular position of the plate (3) relative to the implants varies, and reduces the overall size of the instrumentation.

Abstract: This implant has in combination a pair of clamps (2) provided with spikes (3) and with screws (5) for fixing to two corresponding vertebrae (V2, V4) and notches (23) to support the tips of the blades of a pair of distraction forceps, a rigid plate (6) for interconnecting the two clamps (2) and whose ends are pierced with orifices (17) in which may engage threaded pieces (12) of the camps (2) and whose length (L) corresponds to the distance between the posterior orifices (9) of the clamps (2) after distraction of the vertebrae, and lastly nuts (7) for rigidly connecting together the plate (6) and the clamps (2). This implant has, in particular, the advantage of permitting distraction by the forceps bearing against the clamps instead of against the vertebrae, which was not possible with the previously known plates; in addition, it is compact while at the same time being sufficiently solid, and thus prevents any risk of rubbing against the aorta.