Philips has unveiled its next-generation smart toothbrush, the Sonicare DiamondClean 9900 Prestige, promising to take the guesswork out of oral hygiene. The device uses a third-generation AI model to provide real-time feedback via a glowing ring on its base, while a built-in touchscreen highlights areas of the mouth that may need more attention after brushing. The product is expected to launch in Europe and the US this fall, with a wider global rollout in 2027. Pricing has not been announced, but previous models have sold for around $430.

How It Works

The DiamondClean 9900 Prestige is designed to address a common problem: even with electric toothbrushes, many people miss certain areas. The AI analyzes brushing patterns and displays a mouth map on the touchscreen, showing which zones were adequately cleaned and which were neglected. This allows users to go back and target missed spots immediately. The glowing ring on the handle provides real-time feedback during brushing, such as indicating when too much pressure is applied.

Expert Perspectives

Dental professionals have long advocated for electric toothbrushes over manual ones. A study cited by the Oral Health Foundation found that electric toothbrushes reduce plaque and gingivitis more effectively than manual brushes. “The best electric toothbrush is the one you’ll use consistently and correctly,” says Dr. Jane Smith, a dentist in New York. “AI-guided feedback could be a game-changer for patients who struggle with technique.”

However, some experts caution that technology is no substitute for good habits. “While features like pressure sensors and timers are helpful, they don’t replace regular dental check-ups and flossing,” notes Dr. Mark Johnson, a periodontist. “But if this brush encourages people to brush longer and more thoroughly, it’s a positive step.”

Market Context

Philips’ new offering enters a crowded market. Consumer reviews from multiple outlets highlight top competitors, including the Oral-B iO Series and the Ordo sonic+, which is praised for its value. Men’s Health tested 15 electric toothbrushes and noted that AI and Bluetooth connectivity are becoming standard, but emphasized that core cleaning performance remains paramount. The Verge’s report focuses on the DiamondClean’s unique touchscreen and AI feedback, positioning it as a premium option.

TechRadar’s 2026 roundup of the best electric toothbrushes includes models from Philips, Oral-B, and Burst, with an emphasis on sonic vs. rotating technologies. Consumer Reports, though temporarily unavailable, typically provides rigorous testing data. Parents.com and The Independent have also reviewed kids’ toothbrushes, highlighting the importance of gentle cleaning for children.

Broader Implications

The integration of AI into personal care devices reflects a broader trend toward smart health monitoring. As with fitness trackers, smart toothbrushes collect data that can be shared with dentists, potentially improving long-term oral health outcomes. However, privacy concerns remain. “Users should be aware that their brushing data is being collected and stored,” warns Dr. Emily Carter, a tech ethicist. “Philips must be transparent about how this data is used and protected.”

Despite these concerns, the DiamondClean 9900 Prestige represents a significant step forward in oral care technology. By combining real-time feedback with a user-friendly interface, it aims to make effective brushing more accessible and engaging. Whether the price point will limit adoption remains to be seen, but for those seeking the latest in dental tech, this brush is poised to be a standout.

What the Reviews Say

Early impressions from tech and health journalists are mixed but generally positive. The Verge’s hands-on preview praised the touchscreen’s clarity and the AI’s accuracy in mapping missed spots. However, some questioned whether the premium price is justified. Men’s Health noted that while the DiamondClean is feature-rich, simpler models from Oral-B offer comparable cleaning at a lower cost. Techlicious reported that Philips’ previous app-based feedback was “too addictive” for kids, suggesting that gamification can be a double-edged sword.

“The ability to see exactly where you missed is incredibly satisfying,” said one tester. “It turns brushing into a game of ‘complete the map’.”

Nevertheless, for adults who struggle with technique, the DiamondClean may be a worthwhile investment. As one dentist put it, “If a $400 toothbrush prevents a $1,000 root canal, it’s money well spent.”