The Mechanics of a Palatal Expander

A palatal expander gradually widens the upper jaw by gently applying pressure to the upper molars with each adjustment. The animation below shows when and how to adjust your expander correctly.

After reaching the desired expansion, the appliance stays in place for several months to stabilize the results and help prevent the jaw from shifting back.

How to Adjust Your Palatal Expander

Download a printable PDF of these instructions.

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.

Explore Our Helpful Video Guides

Palatal Expander

Learn how the palatal expander is used to widen the upper jaw for better alignment. This video explains the process, helping you understand what to expect during treatment.

Maxillary Expansion

Maxillary expansion helps widen the upper jaw to improve bite alignment. This video outlines the treatment process, providing clarity on what to expect during the procedure.

Pediatric Palatal Expander

For children requiring palatal expansion, this video walks you through the treatment process. Understand the steps involved to help support your child during their journey.

Post-Op Care for Maxillary Expansion

After maxillary expansion, proper care is essential. This video explains the post-operative steps, ensuring you understand how to care for your child’s gums and monitor their recovery.