Signals Inbox·September 2, 2026·Consumer Health

Is Dyson’s new AI toothbrush really working?

Yes, Dyson CameraJet really works: its camera can detect gaps between teeth and automatically fire a rinse jet. The tougher question is whether that AI makes mouths meaningfully healthier than cheaper premium brushes and water-flossing systems, and Dyson has not proved that yet.

Q1What did Dyson actually launch with CameraJet?

Dyson CameraJet is currently a real $499.99 toothbrush-and-water-flosser that uses a camera and machine learning to decide where to spray between your teeth.

The CameraJet has a 100,000-pixel macro camera that takes 28 images per second. Dyson’s Gap Optical Targeting system looks for the spaces between teeth and can trigger a burst of mouth rinse in roughly one-tenth of a second. Meanwhile, the brush head uses sonic motion, and the MyDyson app tracks coverage, pressure and brushing technique.

Dyson says it trained the gap-detection system on more than 470,000 dental images. The CameraJet took six years to develop, involved 661 engineers and led to 38 patent filings. Those numbers do not tell us whether your gums will become healthier, but they do show how much engineering Dyson put into this product.

Several pieces already existed elsewhere. Oral-B has used AI to track brushing coverage for years. Waterpik already sells a toothbrush that water-flosses while you brush. Dyson’s new trick is linking a camera directly to the jet so the device itself decides when and where to spray.

What CameraJet’s main components do

Q2Does the AI in Dyson CameraJet actually do anything?

Yes, Dyson CameraJet uses AI for a real physical job: finding the gaps between your teeth and automatically firing the flosser when the brush reaches them.

That is a more useful application than simply putting an “AI” label on an app. The camera feeds images into Dyson’s machine-learning system in real time. The software tracks the shape and position of the teeth, predicts when the brush is approaching a gap, then tells the pump when to release mouth rinse.

We should still be precise about what the AI sees. CameraJet is mainly identifying interdental spaces. Dyson has not shown that the system looks at a patch of plaque, recognizes it as plaque and intelligently decides to clean that particular patch.

The AI works, but its job is quite narrow. Dyson has automated the aiming of a water flosser.

Q3Does Dyson CameraJet actually clean teeth better than a manual toothbrush?

Yes, the evidence we have today strongly suggests that Dyson CameraJet cleans better than ordinary manual brushing.

Dyson says its clinical testing found better gum-health outcomes when people used CameraJet with auto-jetting than when they used a manual toothbrush. The exact public description of that study is currently messy, which we will come back to, but Dyson is at least testing the whole brushing-and-flossing system on humans rather than relying only on laboratory models.

The direction of the result also fits decades of outside research. A Cochrane review covering 56 powered-toothbrush studies and more than 5,000 participants found that powered brushing removed more plaque and reduced gingivitis more than manual brushing. Separate randomized trials have found better gum-health measures when water irrigation is added to brushing.

So we do not need a huge leap of faith to believe CameraJet beats a basic manual toothbrush. It combines two approaches that already work well: powered brushing and interdental water cleaning.

The interesting comparison is much tougher. People considering a $500 toothbrush are unlikely to be choosing between CameraJet and a $4 manual brush.

Q4Has Dyson proved CameraJet is better than Oral-B or Sonicare?

No, Dyson has currently shown no convincing human trial proving that CameraJet gives people healthier teeth or gums than a top Oral-B, Philips Sonicare or another premium electric toothbrush.

This is probably the biggest weakness in the launch evidence.

Dyson does compare its brushing performance with “market-leading premium electric toothbrushes,” but that comparison comes from laboratory testing. Its major human clinical claim uses a manual toothbrush as the control.

Premium electric brushes already perform very well. In a randomized crossover study published in Clinical Oral Investigations, 30 adults used an Oral-B iO and an older oscillating-rotating Oral-B model for 28 days each. Plaque scores ended at 25.09% with the iO versus 30.60% with the older brush, with particularly strong differences near the gumline and between teeth.

If CameraJet wants to prove that its unusual hardware changes oral care, that is the type of competitor it needs to beat.

Right now, Dyson has cleared the easier bar.

Q5Is Dyson’s “69% more plaque” CameraJet claim actually legit?

Dyson’s 69% plaque claim comes from a real test, but it sounds much bigger than the underlying evidence actually is.

Dyson says its variable sonic brushing removed up to 69% more plaque than market-leading premium electric toothbrushes in hard-to-reach areas. Some current Dyson regional material has even displayed figures around 72%.

The important words are “up to,” “hard-to-reach areas” and “laboratory.”

This does not mean a CameraJet user finishes brushing with 69% less plaque across the entire mouth. The test measures specific difficult areas under controlled conditions. More importantly, Dyson says the comparison was performed in brush-only variable mode. The camera, automatic gap detection and liquid flosser were not responsible for that headline result.

The experiment does support Dyson’s anti-stall brush design. Dyson changes the angle of sonic oscillation to keep bristles moving when they press against the tooth instead of letting them stall.

We can take the 69% figure seriously as evidence about Dyson’s brush mechanism. Using it as proof that the whole AI CameraJet system is dramatically better would go much further than the experiment allows.

Q6Does the water-flossing part of Dyson CameraJet actually work?

Yes, water flossing has enough independent clinical evidence behind it that CameraJet’s interdental cleaning should be taken seriously.

A systematic review comparing oral irrigators with dental floss found that most of the included randomized studies favored water flossers for plaque reduction, including between teeth. Another 12-week randomized trial involving 90 people with gingivitis found better bleeding and gum-inflammation measures when a Waterpik irrigator was added to brushing.

Waterpik has also tested a product closer to CameraJet. Its Sonic-Fusion combines a sonic toothbrush and water flosser in the same handle. A four-week randomized study involving 105 adults found better plaque, bleeding and gingival-inflammation results with Sonic-Fusion than with manual brushing plus string floss. Water Pik funded that research, so we should keep the sponsorship in mind, but it was still a randomized human trial published in the International Journal of Dental Hygiene.

This gives Dyson a solid starting point. Spraying water or mouth rinse between teeth while brushing is not an untested dental theory.

Q7Is Dyson’s conical CameraJet spray actually better than a Waterpik jet?

We still do not know whether Dyson CameraJet’s conical spray cleans real teeth better than a normal Waterpik-style jet.

Dyson spent five years working with researchers at the National University of Singapore’s Faculty of Dentistry on a material designed to behave like dental plaque during laboratory testing. The team found that a thin, needle-shaped water stream could create a hole through the test plaque while leaving material around it. Dyson’s wider conical spray covered more of the surrounding area.

That is a sensible engineering argument. A wider spray could clean more surface while using less concentrated pressure.

The missing experiment is straightforward: give one group CameraJet, another group a leading Waterpik and measure interdental plaque and gum inflammation after several weeks or months.

Dyson has not published that comparison so far.

For now, the conical jet looks clever in the lab. Calling it clinically superior would be premature.

Q8Does the CameraJet camera actually make your teeth cleaner?

We cannot currently tell how much extra cleaning comes from CameraJet’s camera because Dyson has not isolated that feature in a human clinical trial.

This is where the product gets interesting.

Waterpik already showed that combining a toothbrush and water flosser can improve oral-health measures without using computer vision. That means part of CameraJet’s benefit may simply come from having a flosser attached to the toothbrush.

Dyson’s camera should theoretically improve targeting. Instead of asking someone to manually trace a water jet along the gumline, CameraJet automatically looks for the gaps and fires when it sees one.

We would ideally want to know how often that works: what percentage of gaps does CameraJet detect, how many does it miss, how often does it fire in the wrong place, and how much more plaque disappears because of the automatic targeting?

Dyson has published impressive engineering numbers such as 470,000 training images and roughly 100-millisecond response times. It has not publicly given us those much more practical accuracy numbers.

So the camera solves a plausible problem. We still lack the data showing how much difference it makes.

Q9Does Dyson CameraJet work properly when people actually use it?

CameraJet works in early hands-on testing, but current reviews show that the automatic flossing still takes some practice and occasionally misses where users expect it to fire.

That gap between the demo and the bathroom is worth watching.

TechRadar tested CameraJet for a week and found that the brush did not always fire a jet when the reviewer expected it to. Technique improved with practice, especially after following the app’s prompts about movement and mouth position.

A fresh review in the Evening Standard found something similar. Auto-Jet sometimes stopped when the camera could not see clearly enough, even with Dyson’s non-foaming toothpaste. The reviewer could get it working again after clearing the mouth and found front-tooth gaps harder for the camera to detect than rear gaps.

The Cut’s first hands-on was messier still. Its reviewer accidentally sprayed mouthwash onto her face several times before getting used to the device, although she said her teeth felt unusually clean afterward. TechRadar also complained about spray around the bathroom during jet mode.

Those are very early experiences, and nobody has used the commercial product for months yet. But we already know CameraJet requires more technique than a normal electric toothbrush.

A product designed to automate flossing becomes less compelling if people have to spend weeks learning how to make the automation behave.

Q10Is combining brushing and flossing actually the smartest part of CameraJet?

Yes, CameraJet’s strongest idea may simply be putting interdental cleaning inside a routine people already do every day.

A large US analysis covering 26,624 adults found that only about one-third flossed daily. Even after years of dentists telling people to clean between their teeth, daily flossing remained far from universal.

CameraJet attacks that behavioral problem directly. Someone can put the brush in their mouth, start cleaning and get bursts of interdental rinse without stopping to pick up floss or a separate water flosser.

Waterpik’s Sonic-Fusion follows the same basic logic, which is useful evidence in itself. The integrated format produced good results in its randomized trial without needing a camera or sophisticated machine learning.

For someone who already flosses thoroughly every night, CameraJet may produce a much smaller improvement. Someone who almost never flosses could get a much bigger one.

That difference between users is probably more important than a few percentage points of laboratory brushing performance.

Q11Can Dyson CameraJet actually teach people to brush better?

CameraJet should help some people improve their brushing technique, although we have much better evidence for smart-brush feedback in general than for Dyson’s particular app.

Connected toothbrushes can change behavior. Randomized research has shown that real-time visual feedback can improve plaque control, brushing coverage and brushing duration.

One trial using smartphone brushing feedback saw full-mouth plaque scores fall dramatically in the feedback group. A separate six-month randomized study found better plaque reductions with an interactive connected toothbrush than with conventional brushing. Research using Oral-B’s AI guidance has also shown that visual tracking can help people identify areas they regularly miss.

Dyson now gives similar feedback through MyDyson. The app can show brushing coverage, overscrubbing, excess pressure and the camera’s live view.

The live camera is the unusual part. A small 2024 crossover study from Fukuoka Dental College tested a prototype electric toothbrush with a built-in image sensor. Participants removed more plaque when they could actually watch their teeth while brushing, although only ten dental students took part.

CameraJet has some science behind the basic idea of visual feedback. Whether people will still enjoy staring at the inside of their mouths six months after buying it is another question.

Q12Is Dyson’s toothbrush AI more useful than Oral-B’s AI?

Dyson CameraJet currently uses AI in a more active way than Oral-B because the software controls the flosser itself rather than mainly telling the user where to brush.

Oral-B already offers sophisticated AI tracking. The iO Series 10 can follow brushing across different areas of the mouth, detect pressure and guide users toward missed zones.

Dyson goes one step further mechanically. CameraJet sees a gap and tells the device to fire mouth rinse into it.

That makes Dyson’s implementation more interesting from a robotics point of view. Perception leads directly to an action.

Oral-B has the stronger clinical history, though. The iO platform has already been tested in randomized studies against other powered toothbrushes, while CameraJet has only just arrived and Dyson’s most useful comparative clinical trials still need to be done.

These days, “AI toothbrush” can describe very different products. Dyson currently has the more ambitious automation. Oral-B has more mature clinical evidence.

Q13Has Dyson proved CameraJet will prevent cavities or gum disease?

No, Dyson has not shown that CameraJet users will actually get fewer cavities, avoid periodontitis or need fewer dental treatments over the long term.

The existing evidence focuses on shorter-term measures such as plaque removal and gum health. Those measures are useful because plaque contributes to tooth decay and periodontal disease.

But reducing a plaque index after brushing is several steps removed from proving that a person will need fewer fillings five years later.

This limitation applies to plenty of toothbrush research, not only Dyson. Long studies linking one specific brush to hard outcomes such as tooth loss or major dental treatment are difficult and expensive.

CameraJet has also only just reached consumers, so meaningful long-term real-world evidence obviously cannot exist yet.

Anyone claiming today that the $500 CameraJet will pay for itself through fewer dentist bills is getting ahead of the data.

Q14How good is Dyson’s CameraJet clinical evidence right now?

Dyson’s clinical evidence is promising but currently too unclear and too weakly disclosed for a product making such a big jump in price and complexity.

There is now an especially odd detail in Dyson’s own material.

Dyson’s launch communication, UK website and several regional CameraJet pages say the device was clinically tested with 71 participants over four weeks, twice per day, using Dyson formulations against a manual toothbrush.

Yet Dyson’s current US CameraJet product page says its clinical study involved 204 participants over six weeks.

Those are clearly different descriptions. Dyson may have run more than one study, expanded a study or updated one market before the others, but its public pages currently do not explain the discrepancy. We should not invent an explanation for Dyson.

Either way, neither public footnote gives readers the complete paper we would want to inspect: group sizes, baseline characteristics, full gum and plaque results, effect sizes, confidence intervals, statistical methods and detailed adverse events.

That is unusually relevant here because several parts of the CameraJet routine change together. Users get powered brushing, a new sonic motion, automatic water flossing, Dyson mouth rinse and app guidance.

If gum health improves, we know the package worked better than manual brushing. We still cannot tell how much came from the AI camera.

What Dyson’s current evidence actually supports

Q15Is the $499 Dyson CameraJet actually worth buying?

For most people today, probably not: CameraJet has interesting technology, but Dyson has not yet shown enough extra clinical benefit to make $499 the obvious rational choice.

The price becomes much easier to understand when we compare what already exists.

Waterpik’s Sonic-Fusion 2.0 is around $180 at list price and combines powered brushing with water flossing. Oral-B’s iO Series 10 has a $399.99 list price and offers high-end brushing plus AI coverage tracking.

CameraJet currently costs $499.99. Replacement heads add $29.99 for a pack of two, and Dyson recommends replacing them roughly every three months. Low-foaming toothpaste also helps the camera see, although WIRED reports that people can use compatible third-party products rather than staying entirely inside Dyson’s consumable system.

You are paying extra for the automatic targeting, built-in camera, app, integrated mouth-rinse tank and Dyson’s engineering.

There will absolutely be buyers for that. Someone who hates flossing, loves gadgets and can afford $500 may value the convenience far more than the clinical spreadsheet suggests.

But we have found no evidence that CameraJet currently produces two or three times the dental benefit of cheaper integrated alternatives.

CameraJet versus premium alternatives

Q16Is Dyson CameraJet just another overengineered Dyson gadget?

No, CameraJet addresses a real oral-care problem, but Dyson may have built an extremely expensive solution to something cheaper products already solve reasonably well.

People routinely skip interdental cleaning. Powered toothbrushes work. Water flossing has supporting clinical research. Combining the two steps makes behavioral sense.

That gives CameraJet a much clearer use case than a novelty gadget built mainly to demonstrate engineering skill.

The overengineering risk appears elsewhere. Dyson spent six years developing a camera system, machine-learning model, miniature pump, conical jet, anti-gravity mouth-rinse reservoir and refill dock. Waterpik can already put brushing and flossing into one handle for a fraction of the price.

The outcome that matters is simple: do CameraJet owners clean between their teeth much more consistently, or much more effectively, than people using those cheaper options?

We do not have that comparison yet.

Dyson has solved the technical problem beautifully. We still need evidence that the extra technology solves the human problem much better.

Q17So, is Dyson’s new AI toothbrush really working?

Yes, Dyson CameraJet really works as an AI-guided toothbrush and water flosser, but Dyson has not yet proved that its AI makes your mouth meaningfully healthier than much cheaper alternatives.

The strongest parts of the case are already convincing. CameraJet genuinely recognizes gaps between teeth and automatically fires a liquid jet. Powered brushing has strong clinical support. Water irrigation has its own body of evidence. Early reviewers say CameraJet leaves their teeth feeling very clean, even while reporting a learning curve and occasional missed jets.

The weaker part is the leap from “this technology works” to “this technology changes dental care.”

Dyson’s biggest plaque-removal percentage comes from a brush-only laboratory test. Its clinical studies compare the complete CameraJet routine with manual brushing rather than with Oral-B iO, Sonicare or Waterpik. Dyson has not publicly isolated the benefit created specifically by its camera-guided targeting. As seen above, even Dyson’s own current pages disagree on whether the main clinical study involved 71 people over four weeks or 204 people over six weeks.

Our conclusion today is therefore quite clear. CameraJet is a serious oral-care product rather than fake AI attached to a toothbrush. It should clean teeth and interdental spaces well, and for people who rarely floss, the combined routine could genuinely improve daily hygiene. But the camera and AI are still clinically under-proven relative to how central they are to the product and its $499.99 price.

Right now, Dyson has proved that CameraJet works. It has not proved that people need a CameraJet.