1.Mandibular Advancement selector, which comprises two buckets (2, 3) or mobile dental splints together, wherein the first bucket (2) is connected with a bracket (1).While the second Tank (3) is attached to a cursor (4) Sliding on the regulated segment (1) with the relative movement between the cells (2, 3)And where the relative movement between Cells (2, 3) corresponds to a Pinion (6) subject to a housing (5) fixed to a bucket (2)(3) and (7) engaged in a rack and pinion (6) subject to the other bucket (2, 3).