Most people have no idea whether they’re brushing their teeth properly. They finish their two minutes, rinse, and hope for the best until their next dentist appointment. According to Philips’ own research, 37% of people say they’re left guessing whether they brushed well enough between visits.
Philips wants to fix that. The company just announced the Sonicare Next-Generation DiamondClean 9900 Prestige, its most advanced electric toothbrush to date. The headline feature: a built-in display that maps your mouth in real time and tells you where you’ve brushed and, more importantly, where you haven’t.
The toothbrush removes up to 20 times more plaque than a manual brush and pairs on-device AI with a pressure sensor and motion tracking to coach you through each brushing session without needing a phone app.
How does it work?
The 9900 Prestige tracks your brushing and displays a live “mouth map” directly on the toothbrush handle. As you brush each section of your mouth, the map updates so you can see which areas you’ve covered and which still need attention.
The AI inside the toothbrush learns your habits over time and adjusts its guidance accordingly. If you consistently rush through your lower front teeth, it flags that. The goal is to turn a mindless daily task into something you can actually get feedback on, without having to pull out your phone mid-brush.
Dr. Iain Chapple, Professor of Periodontology at the University of Birmingham, tested the device and said it changed his behavior immediately. “I thought I had a meticulous cleaning regime, but checked the mouth map on the handle and had to go back to my outer lower anterior sextant,” he said. “It is a game changer in personalized biofeedback.”
Why does it matter?
Poor oral health is not just a dental problem. Research links gum disease to a range of serious conditions, including:
- Heart disease and cardiovascular complications
- Difficulties managing diabetes and blood sugar
- Adverse pregnancy outcomes
- Potential connections to Alzheimer’s disease
Despite that, most people brush on autopilot. No feedback, no way to know if they’re doing it right. A toothbrush that shows you what you’re missing in real time is a genuine shift in how people can manage their own oral health between clinical visits.
Francesco Grillo, Philips’ Global Business Unit Leader for Oral Healthcare, put it simply: “For decades, people have been told how to brush better, yet most never truly knew how well they were brushing.”
The context
The 9900 Prestige is the top model in Philips’ new Next-Generation DiamondClean range, which also includes the 8000, 8500, and 9000 models. It comes after a busy year for the Sonicare line, which earlier in 2025 saw Philips refresh its entire 1000 to 7000 series with updated sonic technology, new designs, and a push toward more accessible price points.
Philips has been making electric toothbrushes for over 30 years and holds the top position among sonic toothbrushes recommended by dental professionals. The 9900 Prestige is clearly aimed at the premium end of that market, where the company is betting that real-time AI feedback will justify a higher price tag.
The toothbrush will be available at select retailers in Europe and the US starting this fall, with a broader rollout planned through the rest of the year and into 2027. Pricing has not yet been confirmed.