If your child’s orthodontist has recommended a Rapid Palatal Expander (RPE), you might be wondering what it is and how it benefits your child’s smile. Let’s break it down!
What is a Rapid Palatal Expander?
An RPE is a specialized orthodontic appliance used to gradually widen the upper jaw. It consists of a metal framework that attaches to the upper molars and includes a small screw in the center that is adjusted daily. This controlled expansion encourages the jaw to widen, creating more space for teeth to align properly.
Why is an RPE Used?
RPEs are commonly recommended for children because their bones are still developing, making expansion easier and more effective. Here’s why an orthodontist may suggest an expander:
✔ Corrects a Crossbite – When the upper jaw is too narrow, teeth may not align properly with the lower jaw, leading to a crossbite. Expansion helps correct this issue.
✔ Creates Space for Crowded Teeth – If there’s not enough room for permanent teeth to come in properly, an expander can help avoid the need for extractions or more invasive treatments later.
✔ Improves Breathing – A narrow upper jaw can contribute to airway issues and mouth breathing. Expansion can help open the nasal passages, improving airflow.
✔ Enhances Facial Symmetry – Widening the upper jaw can contribute to balanced facial development.

What to Expect During Treatment
- Treatment typically lasts 4–6 months, depending on the child’s needs.
- Parents may need to turn the expander screw once a day for a few weeks, as instructed.
- A slight gap between the front teeth is normal and a sign the appliance is working!
- Some mild discomfort or pressure is expected but usually fades quickly.
If your child needs an RPE, don’t worry—it’s a simple and effective way to guide proper jaw development and ensure a healthy, beautiful smile!
Have questions? Storms Orthodontics is here to help!