An elongated implant device (10) for stabilizing the spinal column, the implant device comprises a rod-shaped member (28) having a first end (20,20) and a second end (22,22), the rod-shaped member defining a longitudinal axis (9) of the implant device, a sleeve (26) which is slidably arranged on the rod-shaped member (28), the sleeve having a free end (36) and a coupled end (38), the coupled end being connected with an axial dampening element (24), and the axial dampening element (24), which is connected between the sleeve (26) and the second end (22,22) of the rod-shaped member to dampen a movement of the sleeve along the longitudinal axis. The first end (20,20) of the rod-shaped member may be configured to be connected to a first bone anchor (30) and the sleeve (26) may be configured to be connected to a second bone anchor (32).
