Implant for the spine (100) with a) a first and a second component (101, 102) held in a manner that is resistant to rotation against each other and axially movable with one another along a central longitudinal axis (A) of the implant (100), comprising respectively - at least two wall segments (110, 111, 120, 121) fixed on a base (112, 122) extending in the direction of the longitudinal central axis (A), and they have a radial distance in front of it, where two wall segments (110, 111, 120, 121) respectively adjacent circumferentially, flank an intermediate space (S), in which a wall segment (110, 111 extends) , 120, 121) of the other component, being guided axially therein, b) an actuating element (103), which - is disposed in an inner space (IN) of the implant (100) surrounded by the wall segments (110 , 111, 120, 121), - interacts with the second component (102) according to the type of a helical gear - has a toothed crown (401) arranged coaxially to the central longitudinal axis (A) that is used for its rotary drive, - rests on the first component (101) in the direction of loading (R), c) an opening of access (150) that crosses a wall segment (110) of the first component (101), through which, the toothed crown (401) is accessible to the rotary drive of the drive element (103) with the help of a handling tool, characterized by d) a fastener (130) existing in the interior space (IN) that interconnects the free ends (201) of the wall segments (110, 111) of the first component (101), where the drive element (103) is rotatably fixed on the clamping element (130) around the central longitudinal axis (A) and, leaning in the direction of loading (R), on a support surface (202) of the clamping element (130).Implante para la espina dorsal (100) con a) un primer y un segundo componente (101, 102) sujetados de manera resistente a la rotación el uno contra el otro y axialmente movibles el uno junto al otro a lo largo de un eje longitudinal central (A) del implante (100), comp
