Philips has unveiled its first electric toothbrush with on-device AI: the Next-Generation DiamondClean 9900 Prestige. The highlight: A display built right into the handle—the so-called “Mouth Map”—divides the mouth into twelve segments and shows you which areas you missed after brushing. The market launch is planned for fall 2026; Philips has not yet announced an official price.
With this, Philips is bringing brushing analysis back from the smartphone to the toothbrush itself. Previous Sonicare models sent their data to an app that most people stop using after a few days. With the new flagship model, feedback appears directly on the handle, in real time, and while you’re brushing.
Mouth Map and Light Ring: Feedback Directly on the Handle
At the heart of the system is the Mouth Map on the handle’s display. The “Smart Coverage” feature tracks where you’ve already brushed and highlights the twelve segments you’ve missed. In addition, a light ring on the handle reacts in real time to coverage, pressure, and brushing intensity. If you press too hard, SenseIQ technology automatically reduces the intensity. According to Philips, this is powered by a third-generation AI and machine learning model that runs entirely on the device itself. A similar approach to visualizing brushing behavior is familiar from Oral-B, which also relies on pressure sensors and a display in its iO series.
Technology: Familiar Motor, New Guidance
Under the hood is the quieter Sonicare motor, already used in the 5000 to 7000 series, combined with the proven “Fluid Action” sonic technology. With a swipe gesture, you can choose between eight brushing modes and three intensity levels. Philips claims up to 20 times more plaque removal compared to a manual toothbrush and 15 times healthier gums in Clean mode after six weeks. However, these are manufacturer claims, not independent test results.
| Specifications | Details |
|---|---|
| Model | Philips Sonicare Next-Generation DiamondClean 9900 Prestige |
| AI & Guidance | On-device AI (3rd generation), 12-segment mouth map in the handle, light ring feedback |
| Technology | Sonicare Fluid Action, SenseIQ with automatic pressure adjustment |
| Modes & Intensities | 8 brushing modes, 3 intensity levels |
| Colors | Silver White, Satin Mauve, Quartz Black, Storm Blue, Midnight Green |
| Accessories | Charging glass, rechargeable travel case |
| Sustainability | Repair-friendly battery, paper packaging, brush heads made from 70% bio-based materials |
| Market launch | Fall 2026 (Europe/U.S.), other countries by 2027 |
Price, Availability, and a Name Confusion
In addition to the 9900 Prestige, the Next-Generation series also includes the 8000, 8500, and 9000 models. It is scheduled to be available at select retailers starting in fall 2026, initially in Europe and the U.S. Prices have not yet been announced.
Important to note when purchasing: Philips is using the same name for two different models. The DiamondClean 9900 Prestige from 2021, which is already available, still relies on app-based AI rather than the new display in the handle. Be sure not to confuse the two. So if you don’t want to wait until fall, you’ll inevitably have to opt for the older model for now.
Conclusion
The Philips Sonicare DiamondClean 9900 Prestige is an exciting step: brushing guidance moves from the smartphone to the toothbrush, where it’s harder to ignore. Whether the presumed flagship price is justified, however, will only become clear once two things are certain—the final price and how reliably the Mouth Map tracks in everyday use beyond the glossy demo.
