This appliance is designed to widen the roof of your mouth by gently separating the upper jaw. It is activated at home by the parents of younger patients or older patients themselves. Expansion of the upper arch is accomplished in 2 to 4 weeks, but the appliance generally remains in the mouth for 6 months to hold the expansion while new bone growth takes place.

Instructions for activating an expander:

  • Place the key in the front in the center of the expander and push toward the back of the throat until it won’t turn any further (a new hole will appear). Withdraw the key toward the back of the throat. Be careful not to turn the screw back toward the front.
  • DO NOT turn the expander any more than instructed, regardless of when your next appointment is.

What to expect:

  • The back teeth may be uncomfortable for 2 to 3 days after the expander has been placed.
  • You may experience difficulty speaking clearly. (Read out loud to improve speech.)
  • You might also experience difficulty swallowing (which will improve in a few days).
  • You will likely feel pressure each time you turn the expansion screw.
  • Many patients perceive a space open between their front teeth. This is normal and usually closes in 8 to 10 weeks.

DO’S and DON’TS of caring for your expander:

  • DO take extra time and energy to brush well around your appliance and use mouthwash because the expander tends to trap food and bacteria. GOOD oral hygiene will prevent cavities and gum disease.
  • Don’t eat foods that are hard, sticky, or chewy. Take smaller bites with the new appliance.
  • DON’T play with your expansion appliance with your tongue or fingers!