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
118
Reviews
AbigailT
13/09/2026
United Kingdom
Part of promotion
For a clean, healthy smile
Philips always get the design of their products right. The diamondclean 9900 is modern and stylish yet chic. It is much lighter than the previous models of sonicare toothbrushes I have owned which makes it easier to use. It has amazing features such as the type of clean you want your teeth to have (clean, whitening or even sensitive), adaptable pressure and a touchscreen monitor. The toothbrush has a light up base which I use to gauge how much pressure I am applying. I have always brushed my teeth using too much pressure and so it is amazing that the toothbrush can help me correct when this is happening. I would however say that these features take a knock on its battery life. My previous toothbrushes would last a long time without needing charge whereas the DiamondClean 9900 needs to be charged weekly. The toothbrush can also be connected to an app but the app does need to be open at the time of using the brush. I did this for around a week and then no longer used it. I would say it is expensive compared to others on the market but I do think oral hygiene is important and so it is worth paying more for knowing my teeth are being cleaned properly.
This review was made for DiamondClean 9900 Prestige HX9813/92 Rechargeable Toothbrush
This review was made for DiamondClean 9900 Prestige HX9813/92 Rechargeable Toothbrush
UzoamakaC
10/09/2026
United Kingdom
Part of promotion
Smart toothbrush
Really smart toothbrush looking after your general oral health from gum to teeth, helping you daily to ensure your teeth feel clean and your breath smells fresh. I love the intensity setting from low to medium to high. You also get feedback instantly after each brush letting you know areas to focus on and how well you’re doing. It’s light and the vibrations work for instant clean. It comes with a toothbrush which you can use for 180 brushes before needing a replacement head. It also comes with a handy usb charger with the holder and the glass cup too.
This review was made for DiamondClean 9900 Prestige HX9813/92 Rechargeable Toothbrush
This review was made for DiamondClean 9900 Prestige HX9813/92 Rechargeable Toothbrush
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
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.