An expansion plate, RME (rapid maxillary expander) or RPE (rapid palatal expander) is an appliance used to widen the upper jaw to create a broader and more attractive smile. This can also be used to correct any bite discrepancies caused by a narrowed upper jaw and create space in a crowded upper arch. It is Important that this treatment is sought after when the patient is quite young, as expansion plates work best whilst the jaw is still developing.
