Philips Sonicare 9900 Uses On-Device AI to Map Your Brushing Gaps

Philips has unveiled a next-generation smart toothbrush that leverages on-device artificial intelligence to identify which parts of your mouth you're missing during your brushing routine. The Next-Generation DiamondClean 9900 Prestige combines motion tracking and an integrated AI model to give users live guidance on their brushing technique through a glowing indicator ring.

How It Works#

The device uses a built-in touchscreen to display a visual breakdown of your oral health routine. After you finish brushing, the screen shows a "mouth map" that divides your teeth and gums into twelve separate zones. These areas appear as either blue (well-cleaned) or orange (needing attention). The AI tracks the toothbrush's movements while you're brushing, so you can identify exactly which spots require a second pass.

Beyond the post-brushing analysis, the toothbrush offers real-time cues. An illuminated ring at the base shifts colors to signal when you're applying excessive pressure—protecting your gums from damage. The brush also has pressure sensors that automatically dial back its intensity if you're pushing too hard, ensuring gentler bristle contact.

Features and Availability#

The interface includes eight different cleaning modes tailored to specific needs: gum health, deep cleaning, sensitive teeth, and others that users can select via the touchscreen.

The 9900 Prestige is slated to arrive in North America and Europe this fall, with broader international availability expected in 2027. Philips has not yet disclosed pricing, though earlier models in the Prestige line have sold for around $430, suggesting this AI-enhanced version will likely command a higher price tag.