appliance used to resist the oral habits namely the tongue thrusting habit & thumb sucking. It fits behind the teeth against the roof of the mouth and blocks the tongue from thrusting forward against or between the teeth. A tongue thrust appliance can be removable or fixed. FEATURES Habit breaking appliance can be given in cases of thumb sucking and lip sucking. It effectively restrains and correct tongue thrusting as well as thumb sucking habit. Prevent the malalignment of the teeth. Various habit breaking appliances include tongue crib, blue grass appliance, lip bumper, oral screen. Breaking harmful oral habits decreases the likelihood of problems with the development of the facial bones and the positioning of the teeth.