mandibular advance selector, of the type comprising two trays or fixings to dental splints (2, 3) movable with each other, whose first tray or fixation to splint (2) is attached to a regulated section (1), while the second cuvette or splint fixation (3) is attached to a slide (4) sliding on a guide (8) in the regulated section (1) with the relative movement between the cuvettes or fixings to splints (2,3), characterized in that : The guide (8) has a "U" section, with at least one series of holes (9) passing through its edges, and the cursor (4) has through holes (10) coplanar and parallel to the holes (9) and of identical section, so that the separation between each two holes (9) is different from the separation between each two holes (10); and configured to allow the passage of a locking pin (11) through a bore (9) and an orifice (10) aligned. (Machine-translation by Google Translate, not legally binding)1. Selector de avance mandibular, del tipo que comprende dos cubetas o fijaciones a férulas (2, 3) dentales móviles entre sí, cuya primera cubeta o fijación a férula (2) está unida a un tramo reglado (1), mientras que la segunda cubeta o fijación a férula (3) está unida a un cursor (4) deslizante sobre una guía (8) en el tramo reglado (1) con el movimiento relativo entre las cubetas o fijaciones a férulas (2,3), caracterizado porque: La guía (8) tiene una sección en "U", con al menos una serie de taladros (9) pasantes en sus bordes, y el cursor (4) posee unos orificios (10) pasantes coplanares y paralelos a los taladros (9) y de idéntica sección, de forma que la separación entre cada dos taladros (9) es diferente de la separación entre cada dos orificios (10); y configurados para permitir el paso de un pasador (11) de bloqueo a través de un taladro (9) y un orificio (10) alineados.