A dental mouthpiece composed of a flexible material, comprising the dental mouthpiece: a part of a main body (110) comprising a defined compartment having an anterior wall, a posterior wall, and a lateral wall between the anterior wall and the posterior wall , and the anterior wall, the posterior wall and the lateral wall define an interior part of the defined compartment； a part of the cheek retractor (130) connected to the main body part (110)； a part of the suction connector (120) configured to connect the inner part of the main body part (110) to a vacuum suction source, in which the part of the suction connector (120) is connected to the part of the main body (110) at an end opposite the part of the cheek retractor (130)； and a removable mouth support (160) comprising a band (310) formed to fit around the part of the suction connector (120), and an external surface of the part of the suction connector (120) comprises a notched area (210) corresponding to the band (310), and an outer surface of the band (310) is essentially flush with the rest of the outer surface of the part of the suction connector (120) when the band (310) is housed in the area of the notches.Una boquilla dental compuesta de un material flexible, comprendiente la boquilla dental: una parte de un cuerpo principal (110) que comprende un compartimento definido que tienen una pared anterior, una pared posterior, y una pared lateral entre la pared anterior y la pared posterior, y la pared anterior, la pared posterior y la pared lateral definen una parte interior del compartimento definido； una parte del retractor de mejilla (130) conectada a la parte del cuerpo principal (110)； una parte del conector de succión (120) configurada para conectar la parte interior de la parte del cuerpo principal (110) a una fuente de succión de vacío, en la que la parte del conector de succión (120) está conectada a la parte del cuerpo principal (110) por un extremo opuesto a la parte del retractor de mejilla (130)；
