2 year warranty
Available in
Complete care is now 100% visible
Experience Next-Generation Sonicare with the DiamondClean 9900 Prestige electric toothbrush and SenseIQ Adaptive Intensity, delivering real-time personalised guidance. Achieve 20 x more plaque removal* for a gentle yet effective clean.

No. 1 Dental professional reccomended sonic toothbrush brand worldwide1
This product
DiamondClean 9900 Prestige
Rechargeable Toothbrush
£ 634.99
£ 634.99
£ 634.99
Smart coverage feedback
SenseIQ Adaptive Intensity
20 x more plaque removal*
Up to 15 x healthier gums**
Next-Gen Sonicare Technology
Feel our best clean with the A3 All-in-One brush head. Remove 20 x more plaque, enjoy up to 15 x healthier gums in six weeks and see 100% more stain removal in less than two days versus a manual toothbrush. Enjoy a gentle yet effective clean for your teeth and gums with 62,000 bristle movements per minute.
The toothbrush closely follows your progress to help you clean thoroughly. The light ring at the base of the handle glows yellow when a segment of your mouth still needs attention. When it glows blue, the area is clean and you can move on to the next segment. Finished cleaning? A glance at the mouth map on the handle's display will show you any areas that need a touch-up.
SenseIQ Adaptive Intensity helps protect your teeth and gums by automatically adjusting to your brushing style. When Pressure + SenseIQ is activated, the toothbrush senses pressure, motion and coverage up to 100 times a second and reduces the intensity if you brush too hard.
4.6
of 5
103
Reviews
ConorP
09/09/2026
United Kingdom
Part of promotion
Game changer for mouth hygiene
I love this toothbrush! Firstly, the design of the brush, the charger, the travel case, it’s all super premium! I always thought I brushed my teeth well using manual brushes, first time using this brush I instantly realised that wasn’t true, the feeling it leaves your mouth is amazing! It’s absolutely jam packed with tech, lighting to tell you if you’re applying the right pressure, different cleaning modes, intensities, vibration, even features I still haven’t fully figured out. But 2 simple features I love the most, it automatically turns off after 2 minutes brushing, and gives you instant feedback on the touch screen display on how well you brushed, it’s like a teeth brushing game! Lastly, the app, it’s super cool and full of information, but to be honest I don’t use it much. The only downside is the lack of touch scraper I used to like on the manual brushes.
This review was made for DiamondClean 9900 Prestige HX9813/92 Rechargeable Toothbrush
This review was made for DiamondClean 9900 Prestige HX9813/92 Rechargeable Toothbrush
AlanP
09/09/2026
United Kingdom
Part of promotion
Really impressed with this toothbrush
I really impressed with this toothbrush. It is cleans really welly and make me feel gentle on my teeth and gums. And the feedback features are useful for making sure I will not miss any areas and overall it feels very high quality and worth the upgrade.
This review was made for DiamondClean 9900 Prestige HX9813/92 Rechargeable Toothbrush
This review was made for DiamondClean 9900 Prestige HX9813/92 Rechargeable Toothbrush
MelanieM
04/09/2026
United Kingdom
Part of promotion
Excellent premium electric toothbrush
Really impressed with this toothbrush. One of my favourite things is actually the charging setup. The glass tumbler sits on a lovely gold charging base and looks much nicer than having a typical electric toothbrush charger sitting out. The charger is USB, so I actually charge mine in the bedroom rather than the bathroom, which I’ve ended up preferring. The electric point in my bathroom has always been in an awkward position anyway, and because the tumbler is quite a substantial, heavy glass, it feels much more secure charging in the bedroom where there’s less chance of it accidentally getting knocked. The toothbrush itself is excellent too. It feels really good quality and gives a thorough clean without feeling harsh. It’s comfortable to use, feels premium in the hand and my teeth feel noticeably clean afterwards. The whole thing feels well made and thoughtfully designed, and the glass and gold charger make it something I’m actually happy to have sitting out rather than wanting to hide away in a cupboard. Very pleased with it and would definitely recommend.
This review was made for DiamondClean 9900 Prestige HX9813/92 Rechargeable Toothbrush
This review was made for DiamondClean 9900 Prestige HX9813/92 Rechargeable Toothbrush
Based on a study of over 2600 dental professionals (dentists and hygienists) conducted in the United States, Canada, China, France, Germany, Italy, Japan, Korea, the Netherlands, Switzerland, Spain, Sweden and the United Kingdom in 2023-2024.
vs. a manual toothbrush.
in Clean mode vs. a manual toothbrush in 6 weeks.
in less than 2 days vs. a manual toothbrush.