Abstract: An instrument for the positioning of an implant into the human spine, as a replacement for one or more diseased vertebra bodies has vertebra body plates attachable to the healthy vertebra bodies. Distraction rods are provided which at one end are attachable to a vertebra body plate. Two U-shaped parts having limbs which telescopically cooperate and form a tubular housing around the attached distraction rods. The U-shaped parts comprise inner sections which are supported on the distraction rods. A distraction instrument which is connectable to the other ends of the distraction rods is used for exerting a force onto the rods transversely to their longitudinal direction.

Abstract: A reconstruction system for vertebra, with at least one annular middle body and two annular end bodies. The end surfaces of the middle body and of the end bodies are formed such that the bodies may be stacked over one another and one end surface of the end bodies comprises a receiving section. The system includes two approximately right-angled vertebra body plates having a pair of limbs. One limb is formed such that in a direction perpendicular to the axis of an end body, it is insertable into the receiving section in a manner such that the one limb is prevented from moving away from the end body in the direction of the axis. The other limb comprises at least one bore for a bone screw and at least one threaded bore. A connection plate is provided, which at the ends comprises openings for connection to the other limb of each vertebra body plate via a screw.