A device for implantation in a bone is disclosed, wherein this device is a component part of a system, for controlled loading of the reconstructure anterior crucual ligament (ACL) of a knee joint. The device may comprise an outer body, which is provided with a damping mechanism between a distal end and a proximal end. Arranged inside the damping mechanism there is at least one securing element for fixing at least one thread which, at the proximal end of the device, is guided out from the outer body through an aperture in the base.
