a system for gentle widening of the alveolar ridge and simultaneous lateral bone condensing in the case of a horizontal bone deficit. With the aid of screw-like condensing and spreading instruments (Spreaders), it is possible to achieve a controlled and gentle dilatation of horizontally resorbed bone (Bone Spreading). Further, cancellous bone is condensed due to the special geometry of the spreaders (Bone Condensing), so that the primary stability of the inserted implants is increased. Provides an extensive range of instruments for a controlled dilatation with spreaders with a length of 12 mm.