Abstract: A dental appliance for controlling the weight of an individual by slowing down the rate of food ingestion to allow the body time to naturally register the sensation of being full is disclosed. The appliance includes a metal frame having a curved front portion and opposed arms extending rearwardly with first and second wing members mounted thereon. The wing members are contoured to conform to the shape of the lower jaw between the teeth and tongue. The lower jaw is constrained for vertical movement only with lateral movement being opposed by its engagement with the facing surface of a wing member. When the appliance is positioned within the user's oral cavity, lateral movement of the lower jaw with respect to the upper jaw is inhibited while normal up-and-down biting movement is permitted. The chewing process is slowed down and the rate of food ingestion is reduced because grinding action is prevented.