The Amabrush: The Mouthguard That Promised to Brush Your Teeth in 10 Seconds and Then Brushed Your Wallet Clean
How a dental paint shaker raised $4 million on Kickstarter and delivered bankruptcy instead of oral hygiene
Brushing your teeth takes approximately two minutes. This is a fact established by the American Dental Association and confirmed by every dentist who has ever looked at your x-rays with the expression of someone reading a disappointing novel. Two minutes. Twice a day. Four minutes of your entire day devoted to preventing your teeth from abandoning your mouth.
In 2017, a startup called Amabrush decided this was too much time. Their solution: a silicone mouthguard with built-in bristles that vibrated at an undisclosed frequency, paired with a toothpaste capsule system that would brush all of your teeth — every surface, every crevice, every molar — in ten seconds.
Ten. Seconds.
The Kickstarter raised $3.8 million from over 40,000 backers who collectively decided that the two-minute tooth-brushing experience — an activity so simple that toddlers master it — was a problem that required a four-million-dollar solution involving a vibrating mouthguard and proprietary toothpaste pods.
Amabrush filed for bankruptcy in 2019 without shipping a product to most of its backers. The mouthguard that was too good to be true turned out to be too good to exist.
The Vision: A Paint Shaker for Your Mouth
The Amabrush concept video showed a sleek, white, vaguely medical-looking device. You'd insert a mouthpiece — a flexible silicone tray with micro-bristles embedded on all surfaces. You'd click the mouthpiece into a handle. You'd insert a toothpaste capsule. You'd place the mouthpiece in your mouth, press a button, and ten seconds later, every tooth would be cleaned.
The bristles would vibrate in a pattern designed to reach all surfaces simultaneously. The toothpaste would be distributed evenly via the capsule system. The handle would be rechargeable. Replacement mouthpieces would cost $3-6 each. It was, essentially, a car wash for your teeth.
The pitch relied on two unspoken assumptions: first, that a one-size-fits-all mouthguard could reach every surface of every tooth in every person's uniquely shaped mouth (it couldn't), and second, that ten seconds of vibration could accomplish what the ADA says requires two minutes of directed brushing (it absolutely couldn't).
No dentist endorsed this product. This is worth noting because dental endorsement is one of the easier forms of professional validation to obtain — dentists will put their name on floss picks and tongue scrapers. The fact that Amabrush couldn't get a single dental professional to say "yes, this works" should have been the only review anyone needed.
The Glorious User Experience
Nobody (Product Largely Never Shipped) — ★☆☆☆☆
"I backed this for $99 in 2017. In 2018 I received emails explaining production delays. In 2019 I received an email explaining bankruptcy. I have spent more time reading Amabrush update emails than I would have spent brushing my teeth for the next fifty years. The ten-second promise was real — it took ten seconds to realize I'd been scammed."
Dr. Sarah Chen, DDS — Professional opinion
"The idea that a universal mouthguard can effectively clean all surfaces of all teeth is not supported by any dental research. Teeth are different sizes. Mouths are different shapes. The spaces between teeth require specific angled bristle contact that a one-size mouthguard cannot provide. This product was never going to work, and ten seconds was never going to be enough. Two minutes exists for a reason. That reason is physics and anatomy, not the toothbrush industry's conspiracy to waste your time."
Marcus from Vienna, Austria — ★☆☆☆☆
“Four minutes of your entire day devoted to preventing your teeth from abandoning your mouth”
Click to Tweet"I received a prototype mouthpiece. It did not fit my mouth. It fit a mouth, presumably, but not mine, and not the mouth of anyone I've shown it to. The bristles were soft to the point of theoretical — pressing them against a surface was like pressing a cloud against a wall. The vibration was gentle in the way that doing nothing is gentle. I put it in my mouth, turned it on, waited ten seconds, and my teeth felt exactly as dirty as they had before. I then brushed my teeth with a normal toothbrush, which took two minutes and actually worked."
Jen from Brooklyn, NY — ★☆☆☆☆
"The toothpaste capsule system was the real genius of the scam. Not only did you buy the $99 device, but you'd also need to buy proprietary toothpaste capsules at $3-6 each, replacing them regularly. It's the printer-ink business model applied to your mouth. You'd spend $99 to save 110 seconds per day and then $200/year on capsules that a $3 tube of Colgate would have replaced. The economics of laziness are brutal."
The Truth: Kickstarter's Dental Disaster
Amabrush launched on Kickstarter in late 2017 and immediately went viral. The promise of ten-second brushing tapped into the same cultural vein as every other "hack your morning routine" product: the belief that efficiency can be applied to literally everything, including the manual maintenance of your own skeleton.
The campaign raised $3.8 million. The company then raised additional funding from investors, bringing the total to approximately $5 million. They promised delivery in late 2018.
Late 2018 arrived. The Amabrush did not. The company cited manufacturing challenges — specifically, that producing a medical-grade silicone mouthguard with embedded micro-bristles at scale was significantly harder than making a Kickstarter video about it. This is a recurring theme in crowdfunding: the video is easy. The manufacturing is impossible.
By mid-2019, the money was gone. The company filed for insolvency in Austria. Backers received no product and no refund. The forty thousand people who had collectively invested $3.8 million in the premise that brushing teeth was an unsolved problem were left with unclean teeth and lighter wallets.
A few prototype units did make it into backers' hands, and the reviews were uniformly terrible. The mouthguard didn't fit most mouths. The bristles were ineffective. The vibration was underwhelming. The ten-second cycle left teeth feeling essentially unbrushed. Every dental professional who examined the concept said the same thing: you cannot replace directed, two-minute brushing with ten seconds of unfocused vibration, any more than you can replace a shower with standing in light rain for three seconds.
The toothpaste capsule business model — which would have locked customers into a proprietary consumable — died with the company, sparing the world a future where brushing your teeth required a subscription.
The Verdict
The Amabrush is peak optimization culture: the belief that if something takes two minutes, technology should reduce it to ten seconds, regardless of whether ten seconds can accomplish the same thing. It cannot. Brushing your teeth takes two minutes because removing plaque from thirty-two differently shaped surfaces requires time, pressure, and direction — three things a vibrating mouthguard provides in none of the required quantities.
The toothbrush has been refined over centuries. It works. It costs $3. It doesn't require a Kickstarter campaign, proprietary pods, or the suspension of dental science. The Amabrush asked: "What if we disrupted the toothbrush?" The answer, it turns out, is that the toothbrush is not interested in being disrupted, and your teeth are not interested in being ten-second-brushed.
We rate it 1 out of 5 clean molars.
If you want clean teeth without crowdfunding a mouthguard, see our alternatives below.
---
✅What to Buy Instead
Oral-B iO Series 9
Smart electric toothbrush with AI tracking, pressure sensor, and 3D teeth mapping. Takes two minutes. Works every time.
Philips Sonicare DiamondClean
Premium sonic toothbrush with multiple modes and an elegant glass charging cup. Your dentist will be impressed.
Quip Smart Electric Toothbrush
Simple, effective electric toothbrush with subscription refill heads delivered to your door. $25. Brush for two minutes like a grown-up.
Comments
Sign in or create an account to join the discussion.
No comments yet. Be the first to share your thoughts!