Patent ID: 8182535

Claim:
A height-adjustable spinal implant, comprising: a) first and second components rotatably fixed relative to one another and axially movable along a central longitudinal axis of the spinal implant; each of said first and second components having at least two wall segments fixed on a base and extending in a direction of said central longitudinal axis at a radial spacing distance therefrom and forming an interior of the implant; with two circumferentially adjacent wall segments each flanking a space in which a wall segment of the respectively other component extends and is axially guided; b) a drive element: disposed in said interior of the implant enclosed by said wall segments; engaging said second component in a screw mechanism relationship; having a toothed ring arranged coaxially with respect to said central longitudinal axis and used for rotary actuation thereof; and bearing on said first component in a load direction; c) a wall segment of said first component being formed with an access opening extending therethrough for rotary actuation of said drive element via said toothed ring by way of a maneuvering tool; and d) a holding element in said interior connecting free ends of said wall segments of said first component to one another, said drive element being fixed on said holding element for rotation about said central longitudinal axis and bearing, in the load direction, on a support surface extending at right angles to said central longitudinal axis.