We utilize the smallest, most comfortable and compact expanders available for our patients. A rapid palatal expander, or RPE, is a commonly used appliance that allows orthodontist to adjust a skeletal arch size difference in the upper and lower jaws. The RPE is actually able to change the width of the patient’s upper jaw to correct a skeletal problem without surgery. While improvements in technology allow us to treat many patients without expanders, others will have a better esthetic and functional result with the use of expanders. Expanders allow us to develop a broader arch that helps to correct crowding, impacted teeth and develop a better functional relationship of the upper and lower jaws. Expanders also have esthetic benefits of producing a fuller smile and improved facial balance.