Conceived with the cooperation of Dr. ssa Eleonora Schellino and Prof. Remo Modica. Entirely made of Biomedical Stainless Steel. The expanding arms are laser welded to the screw body. Laser engraved directional arrows. It is a device for the rapid expansion of the palate that allows you to get a widening of the single anterior sector of the maxillary arch, still maintaing the expanion at the molar level.