Habit Appliances are devices that are most used to help youngsters break the habit of sucking their thumbs, fingers or pacifiers or thrusting the tongue. This appliance prevents the upper and lower teeth from pushing towards an abnormal position. The main goal of a habit appliance is to not only break such a habit that affects the positioning of the teeth but to prevent an open bite or protruding teeth. a metallic gate is carefully inserted behind the front teeth on the upper gums. It is configured into the mouth through two braces placed on the upper molars.