Functional Activator
The Functional Activator is a sealed mewing mouth guard that trains tongue posture. Its double-arch design guides your tongue to rest on the roof of your mouth, and because it has no breathing holes, it encourages nasal breathing.
Size Small selected
A Mouth Guard for Tongue Posture
The Functional Activator is a tongue posture trainer. It guides your tongue up to rest against the roof of your mouth, and its closed shape encourages you to breathe through your nose instead of your mouth. Daily training, no exercises to learn.
How to use your Functional Activator
Follow these simple steps.
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Start Gradually
Give your mouth time to adapt to your mewing mouth guard.
Start with 15 to 20 minutes, 2 to 3 times a day. Increase your wear time gradually as the Functional Activator becomes more familiar.
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Relax, Don't Bite
Let the tongue posture device do the work.
Place the Functional Activator comfortably in your mouth. Keep your jaw relaxed and your lips gently closed. You do not need to clench or bite down to keep it in place.
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Tongue Up. Breathe Through Your Nose.
This is the tongue posture you are working toward.
Let your tongue rest gently against the roof of your mouth, with your lips closed and your jaw relaxed. Breathe through your nose comfortably rather than forcing the position.
Choose the size that fits your mouth.
One measurement decides it. Take the reading, find the row it falls in, and that row is your size. If the reading sits on a boundary, the full guide shows how to resolve it.
| Small | 33 millimetres or less | Younger users or smaller mouth size. |
| Medium | 34 to 37 millimetres | Most adults. Fits the majority. |
| Large | 38 millimetres or more | Larger mouth size or broader jaw. |
Small
33 millimetres or less
Medium
34 to 37 millimetres
Large
38 millimetres or more
Small, Medium and Large, with the mouth size each one suits.
Buying the Functional Activator for your child?
Get a little more guidance before you begin.
If you're unsure whether your child's jaw is developing evenly, you can submit five simple photos for review and receive guidance on whether additional functional support may be appropriate.
I just want the
Functional Activator
Continue with the Functional Activator and standard usage instructions.
CONTINUE SHOPPINGGET GUIDANCE FOR YOUR CHILD
I'd like guidance
for my child
Take five guided photos of your child's face and bite to begin a functional review.
Takes about 5 minutes. No diagnosis from photos.
Your images are reviewed as part of the assessment process.
Functional Activator
Frequently Asked Questions
Measure from canine to canine using dental floss. Place the floss against a ruler.
- 33 mm or less = Small
- 34 to 37 mm = Medium
- 38 mm or more = Large
The Functional Activator reveals imbalances in your bite that were already there. If your jaw closes unevenly, say, your back molar on one side touches before the other, that asymmetry gets amplified during wear. You're not creating a problem. You're feeling one that was hidden.
This is actually useful information. It tells you where your jaw is compensating. Most people find the soreness decreases within 1 to 2 weeks as the tongue repositions and jaw tension releases.
If soreness persists in one specific spot: You may have a significant bite asymmetry worth addressing with a practitioner.
Your mouth has adapted to incorrect tongue posture, possibly for decades. The Functional Activator puts your tongue where it should be, which can feel unfamiliar.
Start with 5 minutes a day. Increase gradually. Most people adapt within 1 to 2 weeks.
Trim if needed: Use scissors to remove 1mm from any edge pressing into your gums. Keep the wave shape intact.
It's designed that way. The Functional Activator is wider than your jaw on purpose. It's made from flexible material that adapts to your mouth.
How to insert:
- Squeeze the sides together with your thumb and index finger
- Place your upper and lower teeth into the gutters while still squeezing
- Bite down gently to find your position
- Release your fingers. The activator expands to fit your jaw width
It should feel snug, not forced. The width self adjusts once you release.
Start with 5 minutes a day. Your mouth has adapted to incorrect tongue posture, possibly for decades. The correct position feels unfamiliar at first.
If the edges press into your gums: Trim 1mm at a time with scissors. Keep the wave shape intact.
Most people adapt within 1 to 2 weeks.
Functional Activator
The Functional Activator is a tongue posture device made of flexible, BPA-free silicone. Squeeze the sides, place it over your teeth and release: it adapts to your jaw width, with no boiling or molding. Keep your lips gently closed, let your tongue rest on the roof of your mouth and breathe through your nose. Available in Small, Medium and Large.
Customer Reviews
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I have learned to live with neck pain my whole life. This device changed that! I recommend ++
Smooth on the teeth. I am stronger with this when I train. Really nice.
No more clenching!!! Amazing.
CanadaImpressive
I’ve tried many mouthguards in the past and this one has really really made a great difference for me.