Autobrush® Adults

Brush head size guide

Pick the correct brush head size based on the user's age, or you can base it on the actual size of the user's mouth. Refer to our size chart to find the best fit. To measure the size of your mouth, you can use dental floss to determine the right size for you. Our AutoBrush Pro Brush Heads are designed to have the following measurements.

Adult small brush heads

Brush head measures 49mm from front to back and 75mm across at the widest point.

measurements for adult regular brush heads

Adult regular brush heads

Brush head measures 53mm from front to back and 77mm across at the widest point.

measurements for adult regular brush heads

Adult XL brush heads

Brush head measures 59mm from front to back and 77mm across at the widest point.

measurements for adult XL brush heads

Still unsure? We’re happy to help!

Our team is here to answer all your questions on sizing or product features. Just contact us at customercare@autobrush.com

Fluoride vs Nano-HAp

What is the difference between Fluoride and Nano-HAp?

Fluoride and Nano-Hydroxyapatite (Nano-HAp) both enhance dental health effectively. Fluoride is renowned for its ability to strengthen tooth enamel and prevent cavities. Nano-HAp offers a similar benefit as a fluoride-free alternative, perfect for those who prefer it, and is especially safe for children who might swallow toothpaste.

Learn more about Fluoride and Nano-HAp in our blog.

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SHOP AUTOBRUSH | GET UP TO 30% OFF BETTER PLAQUE REMOVALarrow pointing right
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1. Why does plaque keep coming back?

Plaque forms on your teeth every day.
Removing it requires consistent coverage along the gumline, between teeth, and around back molars. That’s where plaque tends to build first.

But brushing is more technique-dependent than most people realize.

You need the right angle, the right pressure, and enough time to clean every surface. Even small missed areas allow plaque to rebuild.

Most adults brush for less than the recommended two minutes.

So the issue usually isn’t effort. It’s how precise brushing needs to be. And maintaining that level of precision, twice a day, across every tooth, is harder than it sounds.

2. Why am I still missing spots?

Traditional brushing relies heavily on technique.

Dentists recommend holding your brush at an angle along the gumline and using small, controlled movements to disrupt plaque where it forms most.

But maintaining that angle across every tooth, every day, is difficult. Back molars, tight gum margins, and inner surfaces are easy to miss.

Consistent coverage isn’t as simple as it sounds.

3. Where is plaque most likely to hide?

Not on the flat, visible surfaces.

Plaque tends to build up in harder-to-clean areas, including:
• Along the gumline
• Around back molars
• In tight spaces that require precise angling
• On surfaces you can’t easily see

These are also the areas people tend to under-clean.

4. How is Autobrush different?

Autobrush is designed to reduce technique dependency.

Instead of cleaning one small section at a time, the U-shaped brush head surrounds your teeth and allows the bristles to contact multiple surfaces at once.

Its patented nylon bristles are angled to follow the dentist-recommended Bass technique, helping target plaque along the gumline while reducing missed areas.

You still guide the brush. The system supports consistent full-arch coverage.

That shift helps reduce missed areas and makes plaque removal more consistent.

5. Is Autobrush clinically backed?

Yes! The brush line is ADA-accepted and clinically shown to deliver:
• Up to 5.1x better whole-mouth clean than a manual toothbrush*
• Up to 82% more plaque removal in hard-to-reach areas*
• Up to 45% better gingivitis reduction*
Plaque forms every day. Your brushing system should perform with the same consistency.

Autobrush is engineered to make plaque removal more reliable without making your routine more complicated.

It's no wonder why dentists recommend it to their patients:

  • dentist-4.png

    Dr. Mikaeya Kalantari, Pediatric Dentist

    "This is a really great toothbrush to get your kids on the routine of oral care. It makes it fun! It makes it exciting! The angle of the bristles and the more powerful vibrations are really really going to go far into getting the teeth clean."

  • dentist-6.png

    Dr. Clara D. Griffey, DDS

    “If you have such a struggle getting them (your kids) brushing in the first place, this is a really great option. The music is what got my kids excited about it and love it!"

  • dentist-5.png

    Kelly Hancock, RDH

    “The AutoBrush for Kids really takes the chore out of brushing. I think this is great for all children because it makes brushing super fun. It's a great motivator. It can also be really good for those with special needs or sensory issues."

Not all u-shaped brushes are created equal

Don’t be fooled by poorly made silicone knockoffs—Autobrush is the only nylon-bristle U-shaped brush that’s ADA-accepted and clinically proven to be effective.
Autobrush Sonic Pro
Others U-Brush Knockoffs
Electric Toothbrush
Manual Toothbrush
Autobrush Sonic Pro Yes!
Others U-Brush Knockoffs No
Electric Toothbrush No
Manual Toothbrush No
Autobrush Sonic Pro Yes!
Others U-Brush Knockoffs No
Electric Toothbrush No
Manual Toothbrush No
Autobrush Sonic Pro Yes!
Others U-Brush Knockoffs No
Electric Toothbrush No
Manual Toothbrush No
Autobrush Sonic Pro Yes!
Others U-Brush Knockoffs No
Electric Toothbrush No
Manual Toothbrush No
Autobrush Sonic Pro Yes!
Others U-Brush Knockoffs No
Electric Toothbrush No
Manual Toothbrush N/A N/A

  • Free shipping

    on subscriptions & orders $99+

  • Lifetime warranty

    we are committed to you

  • 30-day

    money back guarantee

Frequently Asked Questions

Got questions? We've got answers! Check out our full customer care center for more info

Is autobrush ADA accepted?

Yes! Autobrush is the world’s only ADA-Accepted U-shape toothbrush, clinically proven to deliver up to 5.1x better cleaning in just 30 seconds, removing up to 82% more plaque and reducing gingivitis by up to 45%.

Trusted by families, backed by experts, and validated through independent clinical studies at Salus Research, an ADA-accredited facility.

*Based on clinical data conducted at Salus Research.

Why Do Some Dentists Say “U-Shaped Brushes Don’t Work”?

It’s a common misunderstanding! Most dentists have only seen cheap look-alike U-shaped brushes and not Autobrush.

Autobrush is the only ADA-Accepted U-shaped toothbrush with patented nylon bristles (not silicone) and five clinical studies proving its effectiveness.

Our studies show measurable improvements in plaque removal and gum health that knockoffs simply can’t match.

👉 Read our full clinical study results

Why Are Other U-Shaped Brushes on Amazon Cheaper?

Because they cut corners.
Independent clinical testing found that silicone-bristle knockoffs cleaned worse than not brushing at all, leaving plaque and bacteria behind.
In contrast, Autobrush’s patented nylon bristles are clinically proven to remove plaque up to 5.1× better and reduce gingivitis by up to 45% across multiple IRB-approved studies. 

They’re cheaper for a reason. We’re effective for one.
(And yes, Autobrush runs great sales, so stay subscribed to email/text for exclusive deals!)

Are There Clinical Studies to Prove Autobrush Works?

Absolutely, and we’re proud of them!
Autobrush is the only ADA-Accepted U-shape toothbrush backed by five independent clinical studies (and counting).
Our research shows Autobrush outperforms traditional manual brushing in both plaque removal and gum health improvement. 

👉 View our Clinical Study Results

How Do I Find the Right Brush Head Size?

Finding your perfect fit is key to a great clean.

Choose based on your age group or mouth size using our simple Size Chart, or contact our team anytime for personal help.

If it still doesn’t fit quite right, no worries, we’ve got a Perfect Fit Promise: If it’s not a good fit, we’ll fix it for free.

Is Autobrush Good for People with Disabilities?

Yes. Autobrush is a game-changer for users with disabilities, limited mobility, or sensory sensitivities.

It’s been praised by families of individuals with autism, cerebral palsy, muscular dystrophy, and others, helping users brush independently and confidently.

How effective is autobrush on the gum line?

In a clinical study by Salus Research (ADA-accredited), Autobrush users experienced:

  • Up to 45% reduction in gingivitis after 30 days
  • Up to 5.1× better plaque removal overall than a manual toothbrush
  • Up to 71% plaque reduction along the gum line in a single use, compared to only 3.5% for a manual brush. Read the study here

In a head-to-head comparison with a leading ADA-accepted electric toothbrush, Autobrush achieved:

  • 29% plaque reduction along the gum line, versus 10.5% with the electric brush
    Read the study here

These findings show that Autobrush cleans as effectively, or better, in the areas most critical for gum health, while requiring ¼ of the brushing time. 

Is Autobrush Waterproof?

Yes! Autobrush is IPX7 waterproof, meaning it’s safe for use in the shower or while rinsing under running water.

Just avoid submerging it for extended periods.

How Does Autobrush Clean the Backs of My Teeth?

Our patented brush head design surrounds every tooth: front, back, and biting surfaces.

Thousands of nylon bristles pulsate simultaneously to remove plaque from all angles.

For best results, keep the brush moving gently in a side-to-side or figure-8 motion throughout the 30-second cycle.

This ensures every tooth gets the perfect clean, even those tricky back ones!

Does Autobrush Work with Braces or Dental Work?

Yes! Autobrush is safe for braces, retainers, and other dental work.

The soft nylon bristles gently clean around brackets and wires without causing damage.

Just remember to move the brush slightly during the cycle to reach every surface.

(Always check with your orthodontist for personalized care guidance.)

Can I Use My Own Toothpaste?

Of course! You can use your favorite toothpaste with Autobrush.

Our foam toothpaste just makes things smoother (literally). It’s designed to spread evenly and reach every surface.

If using regular toothpaste, try pre-foaming or mixing it with a little water before brushing, which helps distribute it evenly.

How Often Should I Replace My Brush Head?

Every 2 months, just like a regular toothbrush.

This keeps your Autobrush performing at its best and ensures your bristles stay clean and effective.

Tip: Subscribe for automatic brush head refills so you never forget.

What Are Your Customer Happiness Policies?

We’ve got you covered 💙

  • 30-day money-back guarantee
  • Lifetime warranty (while subscribed)
  • Hassle-free returns
  • Free shipping on orders $99+

Will This Make My Kid Lazy?

Nope, quite the opposite!

Autobrush encourages independence, not laziness.

It turns brushing into something fun, empowering kids to take charge of their routines while getting a clinically proven clean every time.

Is Autobrush Completely Hands-Free?

Not exactly, and that’s a good thing.

Autobrush must be guided with gentle motion to clean effectively. Hold it lightly and move your jaw side-to-side or in a figure-8 motion. Leaving it still will *not* produce a proper clean.

The motion helps the brush’s vibrations do their best work, especially along the gum line and back teeth.