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.
Adult regular brush heads
Brush head measures 53mm from front to back and 77mm across at the widest point.
Adult XL brush heads
Brush head measures 59mm from front to back and 77mm across at the widest point.
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
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.
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1. The only ADA-accepted U-shaped toothbrush
There are hundreds of U-shaped brushes on the market.
Only one has earned ADA acceptance:
Autobrush. ADA acceptance requires independent clinical testing at an ADA-accredited research facility — standards that silicone knockoffs have never been required to meet.
One brush proved it. The others haven't even tried.
2. 58,000 nylon bristles vs. silicone that barely cleans
Not all bristles are equal.
Silicone bristles — found in cheap U-shaped knockoffs — can't mechanically disrupt plaque from enamel the way nylon does.
Independent testing found silicone-bristle knockoffs cleaned worse than not brushing at all.
Autobrush uses 58,000 soft nylon bristles, angled to clean every surface.
3. Up to 5.1x better plaque removal — tested, not claimed
Autobrush's plaque removal was evaluated at Salus Research, an ADA-accredited facility, across multiple IRB-approved clinical trials.
The result: up to 5.1x better plaque removal than manual brushing, and up to 82% more plaque removed in hard-to-reach areas.
This isn't marketing.
It's peer-reviewed clinical data.
4. Reaches the spots every other brush consistently misses
Manual brushes work one section at a time.
Even careful technique consistently misses the gumline and the backs of teeth.
In clinical testing, Autobrush removed up to 71% of plaque along the gumline in a single use — compared to 3.5% with a manual brush.
The U-shaped head covers every surface, front, back, and biting, all at once.
5. A full clean in 30 seconds — not 2 minutes
The ADA recommends brushing each quadrant for 30 seconds — two full minutes total.
Most people brush far less.
Autobrush cleans all four quadrants simultaneously, cutting total brushing time to just 30 seconds without cutting corners on coverage.
ADA-accepted. Clinically proven. Built for real life.
It's no wonder why dentists recommend it to their patients:
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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."
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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!"
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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
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Frequently Asked Questions
Got questions? We've got answers! Check out our full customer care center for more info
Is autobrush ADA accepted?
Why Do Some Dentists Say “U-Shaped Brushes Don’t Work”?
Why Are Other U-Shaped Brushes on Amazon Cheaper?
Are There Clinical Studies to Prove Autobrush Works?
How Do I Find the Right Brush Head Size?
Is Autobrush Good for People with Disabilities?
How effective is autobrush on the gum line?
Is Autobrush Waterproof?
How Does Autobrush Clean the Backs of My Teeth?
Does Autobrush Work with Braces or Dental Work?
Can I Use My Own Toothpaste?
How Often Should I Replace My Brush Head?
What Are Your Customer Happiness Policies?
Will This Make My Kid Lazy?
Is Autobrush Completely Hands-Free?