If your child sleeps with their mouth open, snores or wakes up tired no matter how early bedtime starts, you may have heard that a narrow upper jaw could be part of the picture. Sometimes it is. A palatal expander is one of the most common tools orthodontists use to widen a narrow upper jaw, and for some kids it can also make nose breathing a little easier. Here’s what parents should know.
At Balhoff Orthodontics in Lafayette, Dr. Donald Balhoff evaluates how children’s jaws and bites are developing. Catching a narrow upper jaw early often means simpler treatment later on.
What Is a Palatal Expander?
A palatal expander is a small orthodontic appliance that gently widens the upper jaw, or maxilla, to create more room for teeth and the tongue. It’s a skeletal treatment, not just a tooth-straightening tool, which is why timing matters so much for growing children.
The upper jaw is made of two halves joined by a growth seam, called the midpalatal suture, that runs down the roof of the mouth. In children, that seam hasn’t fully fused yet, so an expander can gently separate the two halves and let new bone fill in between them. As kids get older, the seam becomes firmer and expansion gets harder.
Because the upper jaw also forms the floor of the nose, widening it can widen the nasal passages slightly too. That’s where the connection to breathing comes from.
Signs Your Child May Need an Expander
Orthodontists usually recommend expansion for problems with the bite and the width of the jaw. Common signs include:
- A crossbite, where some upper back teeth sit inside the lower teeth when your child bites down
- A narrow upper jaw or a narrow, V-shaped smile
- Crowded front teeth or not enough room for adult teeth to come in
- Habitual mouth breathing, especially when it shows up alongside one of the signs above
The American Association of Orthodontists recommends a first orthodontic evaluation by age 7. That visit doesn’t automatically mean treatment. It simply lets Dr. Balhoff spot concerns while your child is still growing and options are simplest. Our parent’s guide to what age kids should get braces covers timing in more detail.
How a Palatal Expander Works
The most common type is a fixed expander that attaches to the upper back teeth and has a small screw in the center. Here’s how treatment usually goes:
- Fitting. The expander is custom-made and attached to the upper back teeth during a short appointment.
- Activation. Parents turn the screw with a small key on a schedule our team shows them, which widens the jaw a tiny bit at a time.
- Expansion. Over a few weeks, the two halves of the upper jaw gradually separate.
- Stabilizing. Once the jaw reaches the right width, the expander stays in place for several months while new bone fills in and the result settles.
- Next steps. For many kids, expansion is part of Phase 1 of two-phase treatment, with braces or aligners later to fine-tune the bite.
Parents often notice a small gap between the two front teeth during expansion. That’s expected and a sign the jaw is widening. The gap usually closes on its own as the teeth settle.
What Kids Feel Day to Day
Most kids feel pressure rather than pain. There’s often a feeling of tightness across the roof of the mouth, the nose or between the front teeth after a turn, and it fades fairly quickly. Here’s what else to expect:
- Eating: Softer foods help for the first few days. Avoid sticky and hard foods while the expander is in, and rinse after meals so food doesn’t collect around it.
- Speech: A slight lisp is common at first. The tongue usually adapts within a week or two, and reading aloud at home can help.
- Cleaning: Brush carefully around the expander and rinse with water to keep it clean. A water flosser can help too.
Palatal Expanders and Mouth Breathing
Because the upper jaw forms the floor of the nose, widening it can increase the space in the nasal passages. For some children, that can make breathing through the nose easier.
It’s important to keep expectations realistic, though. Mouth breathing has many possible causes, including allergies, enlarged tonsils or adenoids and a deviated septum, and an expander doesn’t address any of those. Research on how much expansion improves breathing is still mixed, and results vary from child to child.
An expander is also not a treatment for sleep apnea on its own. If your child snores regularly, gasps or pauses while breathing during sleep or seems exhausted during the day, talk with your pediatrician or an ENT. When expansion makes sense as part of a bigger plan, Dr. Balhoff can coordinate with your child’s other doctors.
Types of Palatal Expanders
Not every expander works the same way. The right choice depends on your child’s age, how narrow the jaw is and how much expansion is needed.
- Rapid palatal expanders are fixed to the back teeth and turned at home. They’re the most common choice for growing children.
- Slower fixed expanders use a spring design and are adjusted at appointments rather than at home.
- Removable expanders can work for mild cases, but only if they’re worn consistently.
- Miniscrew-assisted expanders anchor to the bone with small Temporary Anchorage Devices (TADs) and are sometimes used for older teens whose growth seam has started to fuse.
Frequently Asked Questions
Does a palatal expander hurt?
Most kids feel pressure, not sharp pain. A feeling of tightness across the roof of the mouth, the nose or between the front teeth is common after a turn and fades fairly quickly. Soft foods help during the first few days, and most children adjust quickly.
How long does a child wear an expander?
The active widening phase usually takes a few weeks. After that, the expander typically stays in for several more months so new bone can fill in and the result stays stable. Dr. Balhoff will give you a timeline for your child’s case.
What is the best age for a palatal expander?
Expansion works best while a child is still growing, before the growth seam in the roof of the mouth fuses. That’s one reason the American Association of Orthodontists recommends a first orthodontic evaluation by age 7, so a narrow jaw can be caught early.
Can a palatal expander help with mouth breathing?
It can help some children breathe more easily through the nose, because widening the upper jaw also widens the floor of the nose. It isn’t a cure for mouth breathing or sleep apnea, though, since allergies, tonsils and adenoids are common causes. Talk with your pediatrician or an ENT about breathing concerns.
Can my child eat normally with an expander?
Mostly, yes. Soft foods are easiest for the first few days. Avoid sticky, chewy and very hard foods while the expander is in, and rinse after meals to keep it clean.
Will my child’s speech change?
A temporary lisp is common during the first week or two while the tongue gets used to the appliance. Most kids sound like themselves again quickly, and reading aloud at home helps.
Can adults get a palatal expander?
Traditional expanders work best in children because the growth seam in the roof of the mouth is still open. In older teens and adults, widening the upper jaw usually takes a different approach, such as miniscrew-assisted expansion or surgery, depending on the case.
Schedule Your Child’s Free Consultation in Lafayette
If any of the signs above sound familiar, the next step is simple. Dr. Balhoff and our team will look at your child’s growth and bite in a caring, energetic atmosphere, then explain exactly what we see and what, if anything, we recommend.
Call our Lafayette office at (337) 761-7070 or request a free consultation online. We look forward to meeting your family.