A pacifier, a system and a method for maintaining proper dentitions in a child are proided. The pacifier may have a bulb which is connected to an external shield by an isthmus. A child may suck on the bulb when the pacifier is worn in the mouth. The isthmus connecting the bulb and the external shield may be flat. Moreover, the isthmus may have a thickness which may be less than a thickness of known connectors, and may be wider from side-to-side than connectors associated with known pacifiers which connect a bulb and external shield. As a result, the pacifier may prevent the child from developing, for example, an open bite or other malocclusion. The pacifier may or may not incorporate a thickened pillow to aid in the reduction of pain associated with teething.