What is a Palatal Expander? Understanding Its Role in Orthodontics

Our lives are filled with milestones measured by turning a certain age. Maybe it’s turning 13 and

being old enough to see a PG-13 movie in theaters, or getting your driver’s license, or turning

18 and finally being an adult. Now, as you replay in your mind all of your significant birthdays,

does the age of 7 come to mind? Probably not.

But that doesn’t mean this isn’t an important birthday. In fact, in the world of orthodontics, this is

the most important birthday of all, so much so that we call it “the magic age of 7”. Around age 7,

your child’s mouth is undergoing all kinds of developmental changes, from a changing jaw

structure to the emergence of permanent teeth. Because of all of these changes, it's often the

perfect time for an early evaluation with an orthodontist.

While everything might look good and on track, there are certain issues that can quietly start

developing that a parent wouldn’t be expected to spot, but that an orthodontist can catch early.



One of the common issues that orthodontists look for at this age is a narrow upper jaw. This

might not be a super obvious problem at first, but as more of your child’s permanent teeth come

in, it can set the stage for a wide range of issues like crowding, bite misalignment, and teeth

getting “stuck” as they erupt.

The good news is that by catching this issue early, there’s a tool that can help guide growth in

the right direction: the palatal expander.

So, what is a palatal expander? Simply put, it’s a mouth appliance that gently widens a person’s

upper jaw, creating additional space where needed.

In this blog, we’ll do a deep dive into what expanders do, why orthodontists use them, and how

they can make sure your child’s orthodontic care is on the right track from the beginning. If

you’re a parent looking for a quality orthodontist in Bakersfield or you need some helpful info on

palatal expanders, you’re in the right spot, so let’s get started!

What is a Palatal Expander?

A palatal expander or a palate expander is a custom-made mouth appliance that is designed to

gradually widen the upper jaw. The device anchors onto the back molars with small metal

bands, and then runs along the roof of the mouth where a small keyhole in the middle allows for

the device to be cranked incrementally.

The reason a palatal expander is effective on children is because everyone has two palatal

bones that don’t typically fully fuse together until the mid teenage years. What an expander

does is it applies slow and controlled pressure to the back molars, pushing apart these two

palatal bones that haven't fully fused. This allows new bone to form in the newly created space,

ultimately making the jaw wider. This is why it’s important to identify a narrow upper jaw early.

Most children wear a palatal expander for about 6 months, with a period of active expansion

(turning the key daily or as instructed), followed by a stabilization period where the device stays

in place, allowing for the bone to fully solidify.

What is a Palate Expander Used For?

When people hear the words palate expander they often know it’s used to create more space,

but apart from that, what is a palate expander used for? What makes it such an important

orthodontic treatment option?

There’s actually quite a few benefits of widening a narrow upper jaw that can drastically improve

your child’s future oral health. So let’s get into them!

Creating Space for Crowded Teeth

This is the most obvious one. When the upper jaw is too narrow, there’s simply not enough

space for a person’s permanent teeth to come in. Expansion creates more space, and allows for

teeth to be guided into better positions more naturally.

Correcting Crossbites

A crossbite is where some of the upper teeth sit inside of the lower teeth. This issue can lead to

uneven tooth wear, jaw pain, and facial asymmetry. Luckily it can be corrected by widening the

upper jaw, so that the upper teeth sit properly aligned with the lower teeth.

Improving Bite Alignment

When the upper and lower jaw don’t fit together as they should it can be uncomfortable, painful,

and make certain daily functions, like chewing, difficult. If left untreated, it can also worsen or

cause long-term problems that are more difficult to treat.

Supporting Healthy Jaw Growth

By intervening early, when it’s clear there’s a problem, an orthodontist is able to guide your

child’s jaw development instead of needing to correct problems later. In orthodontics, prevention

and guiding growth are almost always going to be better options than correcting a problem later

through more complex and costly treatments.

Helping Airway Development

For some patients, a wider upper jaw can actually support better nasal airflow. This can be

important because if certain airway issues are left unaddressed they can manifest into a wide

range of problems from mouth breathing, to poor sleep quality, to changes in facial growth

patterns.

Palatal expanders are a common part of orthodontics for children, because they offer a

non-invasive way to guide growth and help prevent more serious issues from developing down

the line.

Types of Palatal Expanders

There isn’t a one-size-fits-all expander and your orthodontist will choose whichever is right for

your child. There are two main categories of palatal expanders:

Fixed Expanders

Fixed palatal expanders, also referred to as rapid palatal expanders (RPE), are the most

common type of expander for children. They attach to the molars and stay in place throughout

treatment. Parents are then responsible for consistently turning the key at whatever frequency is

instructed by the orthodontist.

Removable Expanders

Removable palatal expanders offer, as their name suggests, an option that can be taken out.

They are used in specific situations, such as when small adjustments are needed. Even though

they’re removable, they should still be worn 24 hours a day, as consistent pressure on the teeth

is necessary for a successful outcome.

Your orthodontist will work with you to determine which of these orthodontic treatment options is

right for your child.

Benefits of Using Spacers for Teeth

People will sometimes get confused and think that spacers for teeth and palatal expanders are

the same thing, when in reality, they have completely different uses.

A palatal expander is used to widen the upper jaw, creating more space and improving how the

bite fits together.

Spacers for teeth, on the other hand, are small devices placed between specific teeth, creating

small gaps so that orthodontic bands or appliances can be placed without having to use a lot of

force.

Orthodontic Treatment Options For Children

We talked about this at the beginning, but it’s worth highlighting again: even if everything looks

fine with your child’s mouth, an early evaluation around the age of 7 can be really important.

That's why the American Association of Orthodontists recommends that every single child be

evaluated by an orthodontist at age 7. A lot is changing during this time, as the jaws develop

and adult teeth start to come in, and an orthodontist can spot early signs of crowding, bite

issues, or jaw development concerns.

Catching problems early often means that simpler, more non-invasive treatment options can be

used. Instead of waiting for an issue to fully develop, your orthodontist can guide growth and

make space in more natural ways. On the flip side, if a problem is left unchecked, it can develop

into a much bigger problem that is more difficult to correct. Treatment can go from something

simple and painless to something complex, invasive, and expensive.

A palatal expander is one example of a tool that is used in orthodontics for children, but it’s not

the only one. Depending on what issues are detected during your child’s orthodontic evaluation,

there are a bunch of other orthodontic treatment options that may be recommended.

- Simple monitoring of jaw growth and tooth eruption over time

- Habit appliances (for things like thumb-sucking)

- Growth guidance appliances- Limited braces or phase 1 treatment

An early evaluation doesn’t automatically mean that your child will need treatment. In many

cases, the orthodontist will just keep an eye on development and step in only when it becomes

necessary.

Conclusion

If your child is 7 years or older, and you’re unsure whether they could benefit from a palatal

expander or another form of early orthodontic treatment, the best step you can take is

scheduling an initial free consultation.

Many parents start their hunt for a quality orthodontist with a quick search of “orthodontist near

me,” but choosing the best orthodontist for your child isn’t just about location. What’s more

important is finding a practice that’s going to truly have your child’s best interests in mind, and

that takes a thoughtful and growth-focused approach to care.

At Cardall Orthodontics in Bakersfield, early evaluations help us establish a baseline for your

child’s oral health and development. From there, we can carefully determine if treatment is

needed, and if it is, when it should take place. Our goal is to guide growth at the right time,

taking a proactive, but never rushed, approach to orthodontics. This makes for simpler future

care and yields stable, long-term results.



Set up an early evaluation today, and we’ll make sure that whether your child needs a palatal

expander, some other form of orthodontic care, or just simple monitoring, they’re on the right

track!