If you or your child has been told that a narrow upper jaw, a crossbite, or crowded teeth needs attention, a palatal expander is often part of the answer. This orthodontic appliance gently widens the upper jaw to create room for teeth and improve how the bite fits together. It is best known as a children’s treatment, but adults ask about it every day, and thanks to newer devices, many adults can now widen the palate without surgery. Our office in Issaquah provides palatal expansion for both kids and adults, serving families across Issaquah, Sammamish, Bellevue, and the greater Seattle area.
Early treatment can radically simplify later treatment, and in some cases it helps a patient avoid more involved treatment altogether. It lets your dentist and orthodontist monitor jaw growth and guide incoming permanent teeth. It also allows the doctor to regulate the width of the dental arches, gain space for permanent teeth, reduce the need for extractions, and lower the chance of impacted teeth. Below we break down exactly what palatal expanders are, how they work, who they help, and what adults specifically should know.
What Is a Palatal Expander?
A palatal expander is a custom orthodontic appliance that widens the upper jaw, also called the maxilla. In younger patients, the upper jaw grows as two separate halves that do not fully fuse together until closer to the end of puberty. Orthodontists use that natural gap to guide the two halves apart slightly, creating space for teeth to grow in and helping the upper and lower jaws line up for a healthier bite.
The expander is custom made from Dr. Dudley‘s 3D digital scan of your upper jaw and teeth. That scan is sent to a lab, where it is turned into a precise appliance fitted to the roof of your mouth. Most expanders have two halves joined by a small screw. Your orthodontist gives you a special key and a schedule for turning that screw a tiny amount at a time. Each turn keeps steady pressure on the jaw so it widens gradually, and the appliance is usually left in place for a short period after expansion so the new bone can stabilize.
How Does a Palatal Expander Work?
In simple terms, the device applies gentle, constant pressure and is adjusted little by little over time to widen the upper jaw. This makes room for permanent teeth to come in and lets existing teeth be moved into better positions. The process is most straightforward in children, when the bone is still soft and easy to guide, but adults can also achieve excellent results with the right appliance. The amount of expansion, the type of device, and the length of treatment are all tailored to your specific jaw.
Who Needs a Palatal Expander?
Palatal expanders address a range of issues tied to a narrow upper jaw. A crossbite, where some upper teeth sit inside the lower teeth rather than outside them, is one of the most common reasons for expansion. A narrow or high palate can also lead to crowding, impacted teeth, and teeth that struggle to erupt properly. Left unaddressed, these problems can contribute to jaw and head pain, uneven tooth wear, breathing issues, and in some cases disrupted sleep.
Because a child’s bones are still growing and softer than an adult’s, expansion tends to be faster and simpler during childhood and adolescence, ideally before all the adult teeth are fully in place. That is why orthodontists often recommend an early evaluation around age seven. Catching a narrow jaw early can make treatment shorter and reduce the need for more involved work later.
Palatal Expanders for Adults
One of the most common questions we hear is whether adults can still get a palatal expander. The answer is yes. Because the two halves of the upper jaw fuse in adulthood, adult expansion works differently than it does in children, but it is very much possible, and today’s options are more comfortable and less invasive than they used to be.
For many years, significant maxillary expansion in adults meant surgery, an approach called surgically assisted rapid palatal expansion. That is still the right choice for some patients. For many others, though, newer appliances now make it possible to widen the palate without surgery.
Non-Surgical Palatal Expansion for Adults (MARPE and MSE)
A MARPE, short for miniscrew assisted rapid palatal expander, is a device anchored to the bone of the palate using small temporary screws rather than relying only on the teeth. A closely related appliance, the MSE or maxillary skeletal expander, works on the same principle. By anchoring directly to the bone, these devices can achieve real skeletal expansion in older teens and many adults without the need for surgery. Candidacy depends on your age, anatomy, and how fused the jaw is, so an evaluation and 3D scan are the only way to know for certain what will work for you. If you have been told you need jaw surgery to correct a narrow palate, it is worth getting a second opinion to see whether a non-surgical option is available.
Adults should expect the process to take a little longer and involve slightly more pressure than it would for a child, but the payoff is the same: a wider upper arch, more room for the teeth, and a more balanced bite.
Different Types of Palatal Expanders
Depending on how much correction your jaw needs, there are several types of expanders. Some are fixed and some are removable, but all of them are custom made to fit your palate. Here are the main options.
Removable Palatal Expander
If your corrections are minor, a removable expander may be the best fit. These often look like a clear aligner tray with a screw in the center. They are usually worn close to 24 hours a day but may not require daily adjustment or as long a treatment window as fixed appliances.
Fixed or Rapid Palatal Expander (RPE)
The fixed expander, most commonly known as the rapid palatal expander or RPE, uses bands attached to the back molars connected by a screw across the roof of the mouth. You will be given a key and a schedule for turning the screw to keep steady pressure on the jaw. RPEs are a workhorse of childhood and adolescent expansion.
MARPE and MSE (For Older Teens and Adults)
As covered above, the miniscrew assisted expander anchors to the bone rather than the teeth, which makes non-surgical expansion possible for many older patients whose jaws have started to fuse. This is often the appliance of choice when an adult needs meaningful skeletal expansion.
What to Expect: Comfort, Side Effects, and Care
Like any treatment that delivers real results, an expander takes a bit of commitment, but it is usually more manageable than people expect. Most patients feel only minor pressure for a few minutes after each adjustment. Your tongue will need to get used to the appliance resting against the roof of your mouth, which can make speaking, chewing, and swallowing feel a little off at first. In most cases you are the only one who notices, and it settles within about a week.
It is completely normal for a gap to open between the upper front teeth during expansion. This spacing is a good sign that the jaw is widening, and the gap usually closes on its own, though braces are sometimes used afterward to guide the teeth together. You may also notice some extra saliva, a temporary lisp, or mild headaches, especially right after an adjustment.
Good oral hygiene matters just as much during expansion as any other time. Brush and floss regularly, and steer clear of chewy, sticky, hard, and crunchy foods so the appliance is not damaged.
Alternatives to a Palatal Expander
Sometimes an expander is not the best route for a particular smile. In those cases, our doctor may recommend traditional braces, removal of impacted or overcrowded teeth, or, for certain adult cases, jaw surgery. The right plan depends entirely on your anatomy and goals, and we will walk you through every option before anything begins. Whatever your situation, Dudley Smiles has a solution that fits.
Frequently Asked Questions About Palatal Expanders
Can adults get a palatal expander?
Yes. Adult expansion works differently because the upper jaw has fused, but appliances like the MARPE and MSE anchor to the bone and can widen the palate in many adults. Treatment may take a little longer than it does for children, and an evaluation with a 3D scan will confirm what is possible for you.
Can you widen your palate without surgery?
Often, yes. Miniscrew assisted expanders (MARPE and MSE) make non-surgical skeletal expansion possible for many older teens and adults who once would have needed surgery. Whether it will work in your case depends on your anatomy, so it is worth a consultation before assuming surgery is the only option.
How long do you wear a palatal expander?
Active expansion usually takes a few weeks, but the appliance is typically left in place for several months afterward so the new bone can stabilize. Your exact timeline depends on how much widening you need and whether you are a child or an adult.
Does a palatal expander hurt?
Most patients feel pressure rather than pain, and any discomfort tends to last only a few minutes after each adjustment. It usually takes about a week to get used to the appliance in your mouth.
What is the difference between an RPE and a MARPE?
An RPE, or rapid palatal expander, anchors to the teeth and is used mainly in children and adolescents. A MARPE anchors to the bone using small screws, which allows skeletal expansion in older patients whose jaws have begun to fuse. The right choice depends on your age and how developed your jaw is.
For Trusted Experience and Care, Choose Dudley Smiles
Dr. Silas “Si” Dudley and his team are dedicated to customized treatment for every patient, delivered in a way that makes you feel heard and comfortable from start to finish. Our team brings energy and an eye for detail to make the whole experience smooth and hassle free.
Deciding to start orthodontic treatment is an exciting step, whether it is for you or your child. If you are ready to find the best path to a healthier smile, we would love to meet you for a free consultation. At Dudley Smiles in Issaquah, WA, no two people are the same, so no two treatment plans should be either. You can also keep up with us on social media.