All About Palate Expanders: A Guide to Orthodontic Expansion

July 9, 2024

For many, a radiant smile is a symbol of confidence and overall well-being. However, misaligned or crowded teeth can detract from this ideal. A narrow upper jaw, medically termed maxillary constriction, can be a contributing factor to these dental concerns. Fortunately, modern orthodontics offers a reliable solution: palate expanders.

Palate expanders, also referred to as palatal expanders or orthodontic expanders, are ingenious medical devices used to gently widen the upper jaw. This creates valuable space for proper tooth alignment, ultimately leading to a healthier and more aesthetically pleasing smile.

The benefits of palate expanders extend beyond childhood. While most commonly employed for pre-adolescent patients with developing jaws, these devices can also be effectively utilized for teenagers and even adults in specific cases. This guide delves into the various types of palate expanders, their mechanisms of action, and the optimal scenarios for their use.

Understanding Your Palate

The palate plays a crucial role in your facial structure and oral health. It separates your nasal cavity from your mouth and provides support for your tongue. The hard palate, located at the front of the roof of your mouth, is where palate expanders are applied. While you might experience slight irritation to the soft palate at the back during initial adjustments, this is usually harmless and temporary.

Types of Palate Expanders

There are different types of palate expanders, each with its advantages. Here's a breakdown of some common ones:

Removable Palate Expanders: 

These offer the benefit of easier cleaning and may be more comfortable for some. However, they require strict compliance to be effective and may not achieve the same level of expansion as fixed expanders.

Fixed Palate Expanders: 

These are permanently attached to your teeth throughout treatment. Let's explore some specific types:

  • Hyrax Expander: This powerhouse expander is known for its rapid expansion capabilities, making it ideal for more complex cases.
  • Quad Helix Appliance: This versatile expander not only widens the jaw but can also correct specific bite issues like a crossbite.
  • Haas Expander: This expander is another popular option for creating space in the upper jaw.

Your Palate Expander Journey

Getting a palate expander is a simple process. Your orthodontist will take impressions of your teeth to create a custom-made expander. They'll then explain the adjustment process, which involves gradually widening the expander using a key or built-in mechanism. While you might experience some temporary soreness and minor speech impediments during this time, your orthodontist will provide tips to manage these discomforts.

The duration of treatment with a palate expander varies depending on the severity of your case and the desired amount of expansion. However, rest assured that your orthodontist will closely monitor your progress and adjust the expander accordingly.

What is the soft palate?

The soft palate, sometimes called the velum, is a muscular marvel located at the back of your roof of mouth. Unlike its bony companion, the hard palate, the soft palate is a flexible curtain composed of muscles and tissues. It hangs down and ends in a teardrop-shaped structure called the uvula, that little dangly thing you might have noticed in the mirror.

What exactly does this do?

The soft palate has a crucial role in swallowing. When you eat, it acts as a traffic cop, directing food and liquids to go down the throat (pharynx) and into your esophagus, the tube leading to your stomach. It accomplishes this by:

  • Sealing the Deal: During swallowing, the soft palate rises and presses against the back of your throat, effectively blocking off the passage to your nasal cavity. This ensures your food doesn't take a wrong turn up your nose!
  • The Uvula's Assist: The uvula acts like a little helper, adding an extra layer of closure during swallowing.

Soft vs. Hard Palate:

While both form the roof of your mouth, the soft and hard palate are quite different:

  • The Barrier: The hard palate sits at the front and is made of bone, providing structure and separation between your mouth and nose. This allows your tongue to move freely for speaking and chewing.
  • Flexibility: The soft palate, located at the back, is all muscle and tissue, making it wonderfully pliable. This flexibility is crucial for its role in swallowing.

Can You Injure Your Soft Palate?

While not common, injuries to the soft palate can occur. These can be caused by:

  • Hot Beverages or Food: Burning the soft palate with hot liquids or food can lead to blisters.
  • Sharp Objects: Accidentally poking or impaling the soft palate with objects like pens or straws can cause bleeding and require medical attention.
  • Chronic Irritation: Constant rubbing from dentures or other devices can irritate the soft palate, leading to scarring.

Keeping Your Soft Palate Healthy

By practicing good oral hygiene and avoiding putting foreign objects in your mouth, you can minimize the risk of soft palate injuries. If you experience any pain or discomfort in the back of your roof mouth, consult a doctor or dentist to determine the cause and get proper treatment

How they’re constructed

Palate expanders might seem like complex dental devices, but their core principle is quite straightforward. Let's delve into the mechanics of how they gently widen your jaw for a healthier smile.

Building the Bridge: The Two Halves and the Screw

Palate expanders are essentially like this bridge, with two halves that securely grip your upper molars on either side. These halves are connected by a key element – a screw strategically positioned in the center of the palate. This screw acts as the "engine" of the expansion process.

Activating Expansion

The secret to widening your jaw lies in the gradual turning of this screw. You'll be provided with a special key, often resembling an opened paperclip attached to a handle. By inserting this key into a designated hole on the screw and turning it towards the back of your mouth, you activate the expansion mechanism.

A Step-by-Step Guide:

Here's a closer look at the activation process:

1. Identifying Expansion Checkpoints: 

The palate expander will have a series of minute holes strategically positioned along the screw track. These serve as essential checkpoints, providing a visual representation of progress as you gradually turn the screw.

2. Initiating Expansion: 

To initiate the expansion process, locate the designated hole currently visible on the screw. This designated hole serves as the "unlocking point" for further expansion.

3. Activation Through Rotation: 

Using the key provided by your orthodontist, carefully insert it into the visible hole on the screw. With a gentle yet firm twisting motion, rotate the key towards the back of your mouth. This crucial rotation activates the expansion mechanism within the expander.

4. Verifying Activation: 

Following a successful rotation, a new hole should appear on the screw track. This newly revealed hole signifies proper activation and successful progress in widening your jaw. It's important to note that if the rotation is not fully completed, the new hole will not appear. This safeguard ensures proper activation and prevents over-tightening.

Custom-Made for Your Smile:

It's important to note that palate expanders are custom-made for each patient. Your orthodontist will take a precise impression of your upper jaw and teeth. This impression is then sent to a dental lab where a skilled technician crafts the expander to perfectly fit your unique anatomy.

Do Palate Expanders Hurt?

The good news is that palate expanders shouldn't cause pain during everyday wear. However, you might experience a temporary sensation of pressure on the roof of your mouth or a tingling feeling in your teeth after adjusting the expander. This pressure might even extend to your nose or eyes. Don't worry, this feeling usually disappears within 5 minutes.

Getting Used to Your New Smile Partner

Just like braces, palate expanders require an adjustment period. For a few days, you might feel more aware of the expander while speaking, chewing, and swallowing. Your tongue might also feel a little sensitive resting against it. A slightly raw or full feeling on the roof of your mouth for a day or two is also common.


The good news? You'll likely adapt within a week. During this time, opting for softer foods like smoothies, scrambled eggs, tofu, and yogurt can ease the transition. Remember to avoid chewing gum, hard candies, and sticky or chewy foods like steak, taffy, or apples, as these can damage the expander.

Potential Side Effects

While uncommon, some temporary side effects associated with palate expanders include:

  • Lisping: This is a temporary speech impediment that usually resolves on its own as you adjust to the expander.
  • Drooling: Increased saliva production is a common response to having a new object in your mouth and typically subsides within a few days.
  • Headaches: Some people experience mild headaches after adjusting the expander, but these usually disappear within a day or two.

Space Between Your Front Teeth? It's Normal!

Don't be alarmed if a gap forms between your two upper front teeth during treatment. This is a normal consequence of jaw widening and often closes naturally over time. In some cases, braces might be needed later to achieve the final alignment.

How Long Will You Have Expander?

The duration of treatment depends on your age and the desired amount of jaw widening.


  • Children: Their growing jawbones respond quickly to expanders. In children, the expander might widen the jaw within 2 to 3 months. The device is then typically worn for an additional 4 to 6 months to allow the jawbone to solidify and teeth to settle into their new positions.
  • Teenagers and Adults: With fully developed jaws, the process may take a year or even longer. In some cases, a surgically inserted expander might be recommended for adults.

Keeping Your Smile Sparkling Clean


Maintaining good oral hygiene is crucial while wearing a palate expander. Plaque buildup around the expander can cause inflammation and swollen gums, making adjustments uncomfortable. 


Here's how to keep your smile sparkling clean:

  • Brush and floss regularly, especially after meals.
  • Consider an electric toothbrush for optimal cleaning around the expander.
  • Use a mouthwash to reach areas difficult to access with a brush or floss.
  • Avoid chewy, sticky, or hard foods. These can damage the expander or trap food particles.
  • Instruct children not to chew on hard objects like pencils.


Palate expanders offer a remarkable solution for achieving a healthy and aesthetically pleasing smile. By gently widening the upper jaw, they create space for proper tooth alignment, promoting both oral health and self-confidence.

Get in Touch!

Text or Call (248) 435-2000

730 N. Crooks Rd. Clawson, MI 48017

New patient? Special offer here!
Chat with us
Welcome to Bruno Orthodontics!
We are open and offering complimentary new patient consultations.
How can we help?
I'm considering treatment
I’m a patient and need assistance
Excellent, I can help!
Good news, we're are now offering both free Virtual and In-Office Consultations
I'd like to set up a virtual consultation
I'd like to set up an in-person consultation
I have a quick question - click to call Bruno Orthodontics