In one aspect, the present invention is directed to a dental treatment aid device, comprising: a substantially annular frame (14) having at least two resilient opposite points on the frame； and a gauze (16) enclosed by the frame (14) and attached to the frame (14)； wherein the dimensions of the frame allows placing the frame, in a folded state, into a patient's mouth, between the palate and tongue thereof； thereby the resiliency of the frame affix the frame to the walls of the mouth of the patient, thereby preventing solid objects from entering the pharynx of the patient while undergoing dental treatment.
