Expander device for the palate with anterior and posterior regulation that, being of the type that aims to produce expansion between the teeth on the right and left of the palate, working on the anchorage of the piece or teeth to be moved in each side by means of an actuator wire (13), it is characterized in that it comprises a central guide plate (2), of rectangular configuration and variable dimensions, which is provided with two guides (3), arranged on two opposite sides thereof, coinciding with the part anterior and posterior of the palate, and to each of which two slides (4) are attached, which, in turn, are inserted in a regulation screw (5) provided with two threaded ends (6, 6') one clockwise (6) and another on the left (6'), through threaded holes (11), which on one slide (4) is right-hand threaded and on the other, left-hand thread, so that the central guide plate (2) incorporates two of said screws regulation (5), one in each of its guides (3) with two sliders (4) inserted in each screw, each slide (4) being linked to the end of an actuator wire (13), said regulation screws (5 being) equipped with means to fix to the central guide plate (2) and with means to procure its rotation. (Machine-translation by Google Translate, not legally binding)1. Dispositivo expansor de paladar con regulación anterior y posterior que, siendo del tipo que tiene como finalidad producir la expansión entre las piezas dentarias de la parte derecha e izquierda del paladar, trabajando sobre el anclaje de la pieza o piezas dentarias a mover en cada lado mediante un alambre actuador (13), está caracterizado porque comprende una placa guía central (2), de configuración rectangular y dimensiones variables, que está provista de dos guías (3), dispuestas en dos lados opuestos de la misma coincidiendo con la parte anterior y posterior del paladar, y a cada una de las cuales se acoplan dos deslizaderas (4) que, a su vez, van insertadas en un tornillo de regulación (5) provisto de dos extre
