An intervertebral implant for insertion between two vertebrae is
disclosed. A first part has a first contact surface extending between its
two ends a first guide surface extending out from the first contact
surface. A second part has a second contact surface extending between its
ends, and a second guide surface recessed into the second contact
surface. The first guide surface and the second guide surface cooperate
so that the first contact surface of the first part can slide relative to
the second contact surface of the second part with a translation motion
guided by the cooperating structures of the first and second guide
surfaces. The height of the intervertebral implant can be altered by
shifting the first part and the second part relative to each other by
moving the contact surfaces relative to each other by using the
cooperating guide surfaces.
