Does a palatal expander hurt?

Not in the way parents fear. There are no injections and no drilling involved in fitting one. After each turn of the key, most children feel several minutes of pressure behind the nose and across the upper teeth, which fades quickly. The first few days are the most awkward, mainly because the appliance feels bulky and changes how the tongue sits. Speech and eating normalize within about a week, and pain relief is rarely needed beyond the first day or two. For a week-by-week breakdown, read our parent guide: Does a palatal expander hurt?

Why did a gap open between my child's front teeth?

That gap is the appliance working, and it is one of the most common reasons parents call us alarmed. As the two halves of the upper jaw separate, the front teeth drift apart at the midline. It is a visible sign that expansion is happening as intended. The gap typically closes on its own over the following weeks as the surrounding fibers pull the teeth back together, and any remaining space is addressed in later treatment.

How long does my child wear the expander?

Active turning usually lasts a few weeks to a couple of months, depending on how much width is needed. After that, the appliance stays cemented in place for several more months without being turned. That holding period is not optional — it is when new bone fills the space created in the suture. Removing it early risks the jaw narrowing back toward where it started, which would undo the treatment.

Is my child too old for an expander?

It depends on growth, not just birthdays. The palatal suture typically fuses somewhere in the mid-teens, and the timing varies considerably between individuals. Before fusion, expansion is straightforward. After fusion, achieving the same skeletal widening generally requires a surgically assisted procedure. A scan tells us where your child actually is, which is why the age-7 evaluation matters even when nothing looks wrong. Early Orthodontic Treatment →

Which children need a palatal expander?

Children with a narrow upper jaw, a crossbite or severe crowding are common candidates, ideally between about ages 7 and 12 while the jaw is still growing.

Palatal Expander for Kids: Guiding Jaw Growth Before the Window Closes

Reviewed by Dr. Christine Esposito, Board-Certified Orthodontist at Sunset Children’s Dentistry · Updated October 12, 2026

A palatal expander for kids is a small appliance fitted to the roof of the mouth that gently widens the upper jaw over a few months. It is the best-known tool in dentofacial orthopedics — the part of orthodontics concerned with the bones of the face and jaw, not just the teeth sitting in them.

It works because a child’s upper jaw is still two halves joined by a growth suture that has not yet fused. Widen it now and the body fills in new bone. Wait until the late teens and the same correction usually requires surgery.

Book Free Consultation Call (803) 262-2455

Child at a palatal expander for kids consultation with the orthodontic team at Sunset Children's Dentistry in Lexington, SC

What does a palatal expander do?

A palatal expander gently widens a child’s upper jaw while it is still growing, making room for adult teeth and fixing crossbites. At Sunset Children’s Dentistry in Lexington, board-certified orthodontist Dr. Christine Esposito fits and monitors each expander. Learn more about orthodontic care at Sunset Children’s Dentistry.

Parents usually arrive worried about crowded teeth. Often the real issue is a jaw that is too narrow for the teeth that are coming. Expansion addresses the cause instead of rearranging the symptom.

Treatment is short. Active widening typically takes three to six months, followed by a holding period while new bone stabilizes.

Creates real arch space: frequently reducing or removing the need to extract permanent teeth
Corrects crossbites: stopping the jaw from growing off-center
Can improve nasal airflow: widening the palate also widens the nasal floor
Works with the body’s own growth: not force, but guided development
Short active phase: most expansion is complete within a few months
Age-dependent: most effective before the palatal suture fuses in the mid-teens

See Early Treatment

Learn More About Dentofacial Orthopedics at Sunset Children’s Dentistry

Dentofacial orthopedics at Sunset Children’s Dentistry includes palatal expanders and other early treatments that guide jaw growth.

Expanders are the most common orthopedic appliance, but not the only one. Which appliance your child needs depends on which bone is out of position.

Palatal Expanders: The Most Common Jaw Expander for Children

Fitted to the upper molars and widened gradually with a small key at home. Used for narrow arches, crossbites, and crowding. The most frequently prescribed orthopedic appliance in children.

Crossbite Correction

When upper teeth close inside the lower teeth, the jaw often shifts sideways to find a comfortable bite. Left alone through growth years, that shift can become a permanent facial asymmetry. Early crossbite treatment for kids stops the shift while it is still simple to correct.

The most common type is a rapid palatal expander, a fixed appliance that attaches to the upper back teeth and gradually widens the upper jaw with small, gentle turns of a center screw. In children the two halves of the palate have not fused yet, so palatal expansion can create space for permanent teeth, correct a crossbite, and lower the chance of impacted teeth, especially the upper canines. Most expanders are worn for about 3 to 6 months, including a few months of holding the new width in place. Teens and adults whose palate has already fused may need a different approach, which Dr. Esposito will explain at the consultation.

Growth Modification Appliances

For significant overbites or underbites, appliances can encourage one jaw forward or restrain the other while growth is still available — the alternative later is often jaw surgery.
Surgical Orthodontics →

Airway and Habit Considerations

Chronic mouth breathing and thumb habits shape the palate. We assess these alongside the bite, and coordinate with your pediatrician or ENT when something beyond orthodontics is driving it.

How does expander treatment work at Sunset Children’s Dentistry?

Dr. Esposito fits a custom expander to the upper back teeth, and parents turn a small key as directed for a few weeks. The expander then stays in place while new bone fills in, usually for a total of about 6 to 9 months.

From the first scan to the day it comes out, here is what the process looks like.

STEP 1

Evaluation and Records

We measure arch width, check for crossbite, and take a 3D scan. This visit determines whether expansion is appropriate and whether your child’s growth timing still supports it.

STEP 2

Fitting the Appliance

The expander is custom-made and cemented to the upper molars in a short appointment. There are no shots and no drilling. Most children describe it as feeling bulky rather than painful.

STEP 3

Turning at Home

You will turn a small key once or twice a day for several weeks, and we will show you exactly how before you leave. Children feel pressure for a few minutes after each turn. A gap often opens between the front teeth — this is expected and closes on its own.

STEP 4

Holding and Removal

Once the target width is reached, the expander stays in place for several months while new bone fills the suture. Removal is quick and painless. Retainers →

Schedule Free Consultation

We love our dentist Dr. Kathy she great with the kids and does a great job. All the ladies are wonderful and sweet we have been going for several years now and have never had any problems with anything. The Atmosphere is great always so inviting and warm. Best children’s dentist!!! Thank y’all.

Verified Patient|Sunset Children’s Dentistry Family

My children and I are new patients this year, and our experience here was great. They explain everything that is wrong with their teeth, and everything that will be done to their teeth. They make them feel very comfortable, and are very caring. Thank you to the phenomenal women who work hard to help our babies everyday!!!!

Verified Patient|Sunset Children’s Dentistry Family

We had the BEST! Experience today. As a mom of 3 ( one having their first appointment) I was THOROUGHLY impressed with the efficiency of the team and the seamless experience for new patients. I also was thankful that they were able to work my kids in for an appointment without a 3 month wait time!

Verified Patient|Sunset Children’s Dentistry Family

What are the benefits of a palatal expander?

Expanding early can make room for crowded adult teeth, correct a crossbite, and lower the chance of needing tooth removal or jaw surgery later. Sunset Children’s Dentistry checks progress every few weeks.

Orthopedic treatment changes the foundation, which is why its effects reach past appearance.

Room for Permanent Teeth

Widening the arch creates genuine space, which is frequently the difference between keeping all the permanent teeth and removing two of them to relieve crowding.

A Symmetric Bite

Correcting a crossbite early stops the jaw from habitually shifting to one side, which protects against the asymmetric growth pattern that becomes much harder to fix later.

Easier Breathing for Some Kids

Because the palate forms the floor of the nasal cavity, widening it can improve nasal airflow in children whose narrow palate contributes to mouth breathing.

Avoiding Surgery Later

The same widening that takes a few months at age nine typically requires surgically assisted expansion once the palatal suture fuses. Timing is the whole advantage.

Why Choose Sunset Children’s Dentistry for Dentofacial Orthopedics?

Families choose Sunset Children’s Dentistry for dentofacial orthopedics because board-certified orthodontist Dr. Christine Esposito fits and monitors each expander in the same office as their child’s dentist.

Orthopedic treatment is timing-sensitive and growth-dependent, which makes specialist training genuinely important. Dr. Christine Esposito’s master’s research at UNC Chapel Hill was on bone-anchored maxillary protraction — guiding upper jaw growth — and earned the American Association of Orthodontists’ Thomas M. Graber Award.

In other words, the specific question your child’s case turns on is the one she spent her research career on.

Diplomate, American Board of Orthodontics
Award-winning research in guiding jaw growth (AAO Thomas M. Graber Award)
UNC Chapel Hill orthodontic residency
Growth tracking on site alongside routine pediatric dental visits
Conservative recommendations: appliances only when the evidence supports them
Coordination with your pediatrician or ENT when airway factors are involved

The AAO’s overview of orthodontics for children is a useful neutral reference while you weigh options.

Meet Your Child’s Team

Orthopedic appliances are planned by a board-certified orthodontist and monitored alongside your child’s regular dental care.

Dr. Christine Esposito

Board-certified Orthodontist in Lexington, SC

Dr. Christine Esposito is a board-certified orthodontist bringing specialized orthodontic care to Sunset Children’s Dentistry’s exclusively pediatric practice. She chose orthodontics for the way it combines science, artistry, and clinical…

Read bio

Wondering If Your Child Needs an Expander?

To find out if your child needs a palatal expander, book a free orthodontic evaluation at Sunset Children’s Dentistry by calling (803) 996-0753.

One free evaluation with our board-certified orthodontist answers it, and it is the simplest way to learn whether an orthodontic expander in Lexington, SC is the right next step. If expansion is not warranted, we will tell you that too.

Book Free Consultation Call (803) 262-2455

Frequently Asked Questions

The questions parents ask most before their child gets an expander.

Does insurance cover a palatal expander?

Many dental plans with orthodontic benefits cover expanders for children. Sunset Children’s Dentistry reviews your coverage and payment options at a free orthodontic consultation, before treatment starts.

Expander treatment is usually part of a Phase I plan rather than a standalone charge. We quote the full plan before treatment begins.

Payment Plans

Monthly plans spread cost across the treatment period.

Insurance

Coverage varies significantly for orthopedic appliances. We verify your benefit before you commit.

HSA and FSA

Orthodontic appliances are generally eligible expenses for pre-tax health accounts.

Ask About Payment Options

Areas We Serve Near Lexington, SC

Families bring their children to us for expander evaluations from across Lexington County and the Midlands, including:

Lexington, SC (our office at 5080 Sunset Blvd)
West Columbia & Columbia
Red Bank
Oak Grove
Gilbert