Palatal Expanders


A palatal expander is used to widen the upper jaw so that the bottom and upper teeth will fit together better. While there may be some initial discomfort when an expander is placed just because there has never been anything like that attached to the teeth before, for the most part upper arch expansion is relatively painless. Patients report that they feel pressure on the teeth, in the roof of the mouth, behind the nose, and even between the eyes as their expander is activated. This pressure fades within minutes.

Besides pressure, you can also expect your child to speak differently for the first few days. Additionally, you may hear them slurping as their mouth creates extra saliva after expander cementation. One of the most visible signs that the suture is opening (the desired effect) is the appearance of a space between the upper central incisors. The space is created as the expander pushes the two halves of the palate in opposite directions. Once you have stopped activating the expander, it is normal for the space to close spontaneously. This occurs as the elastic fibers in the surrounding gum tissues return to their original positions. The underlying bone, however, remains expanded. It is also normal for the front teeth to feel a little loose and get sore as they move back together.

To make the first couple of days more bearable for your child as they adapt to their new expander, you may want to find some fun foods for them to eat that don’t require a lot of chewing. Examples include yogurt, pudding, mashed potatoes, ice cream, etc. A day or two after their delivery appointment, the expander will feel natural in their mouth and normal eating will resume. While expanders are more forgiving of hard and sticky foods than are braces, it is recommended that patients avoid jelly-like candies that would get stuck in the expansion screw.


Adjusting the Palatal Expander

  • Step 1 - In a well-lit area, tip the patient's head back.
  • Step 2 - Place the key in the hole until it is firmly in place.
  • Step 3 - Push the key toward the back of the mouth. You will notice the fender will rotate and the new hole will appear. The rotation stops when the key meets the back of the expander.
  • Step 4 - Press back and down toward the tongue to remove the key. The next hole for insertion of the key should now be visible.