RPE - Standard Rapid Palatal Expander

The standard Rapid Palatal Expander (RPE) uses a metal screw soldered to bands. It is opened at a rate of 1/2mm per day using a wire key. The screw opens laterally causing the palatal plates to push apart. The patient is instructed to open the screw ¼ turn twice a day until the desired amount of expansion is achieved. The appliance is then worn passively to act as a stabilizing device until new bone has formed along the suture.