The Philips Sonicare DiamondClean 9000 is the best premium sonic brush we tested, and our top recommendation for sensitive gums: its high-frequency vibration cleans thoroughly but feels gentle. Here's how it compares — and who it's really for.
Where Oral-B oscillates and rotates a small round head, Philips takes a completely different approach. Sonicare brushes use a brush-shaped head that vibrates at very high frequency, driving a mixture of toothpaste and saliva between the teeth and along the gum line. The DiamondClean 9000 is the polished flagship of that range, and it makes the case for sonic cleaning beautifully — particularly if you find round-head brushes too aggressive.
| Model | Price | Cleaning action | Cleaning modes | Battery life | Rating | Link | |
|---|---|---|---|---|---|---|---|
 | ★ Top pick Philips Sonicare DiamondClean 9000 Electric Toothbrush | £149.99 | Sonic (high-frequency vibration) | 4 modes, 3 intensities | ~2 weeks per charge | ★ 4.5 | View → |
£149.99 £299.99
Sonic (high-frequency vibration) · 4 modes, 3 intensities · ~2 weeks per charge
The verdict from Sofia Romano, dental-care reviewer
The best premium sonic brush. Where Oral-B oscillates and rotates, the Sonicare DiamondClean 9000 uses high-frequency sonic vibration that drives toothpaste and fluid between the teeth — it feels gentle but cleans thoroughly, which makes it our top recommendation for sensitive gums, veneers or other dental work. The charging glass and travel case are a genuinely nice touch. If you find round-head brushes too aggressive, this is the one to buy.
A fine, tingly high-frequency buzz rather than a scrub; gums feel soothed rather than worked over.
This is the brush we reach for first when someone has sensitive gums, veneers, crowns or other dental work. The sonic action is inherently gentler than the scrubbing feel of a round head, so it cleans thoroughly without feeling harsh — which is exactly what sensitive mouths need. It also suits anyone who simply prefers a smoother, tingly clean to a brisk scrub, and who appreciates premium design touches like the charging glass and travel case.
It's less obviously the choice for someone on a budget, or for anyone who specifically likes the "scrubbed" feeling of an Oral-B round head. If you want sonic cleaning but the price gives you pause, the Ordo Sonic+ offers a very similar experience for less. The DiamondClean is the one to buy when comfort and finish matter as much as the clean itself.
Sonic cleaning takes a brush or two to get used to — there's less of the "I can feel it working" sensation than with a round head — but the results are excellent. The high-frequency vibration is very effective between the teeth and around the gum line, and it leaves the whole mouth feeling clean and fresh. For everyday plaque control it's right at the top of our test.
The DiamondClean's defining quality is how kind it is to your gums. The sonic action doesn't physically scrub the gum margin, and a pressure sensor adds a further layer of protection by alerting you if you push too hard. For anyone whose gums have receded or who has had a dentist warn them about brushing too aggressively, this combination is genuinely reassuring.
There are four cleaning modes and three intensities, which sounds like a lot but mostly comes down to a standard clean, a gentle setting for sensitive days and a whitening mode. The motor is quiet, the handle is slim and well balanced, and the whole brush feels every bit as premium as the price suggests.
Battery life is around two weeks per charge, and this is where the premium pack shines: the brush charges by standing in an elegant glass, and the included travel case charges over USB so you're never caught short away from home. These are the touches that justify the higher price over a plainer sonic brush.
The two things to weigh up are running cost and feel. Sonicare replacement heads cost more than basic Oral-B heads, so the long-term running cost is higher — worth remembering, since you replace heads every three months. And if you're someone who loves the brisk, scrubbed sensation of a round-head Oral-B, the gentler sonic feel can take some getting used to and may simply not be to your taste. Neither is a fault; they're the trade-offs that come with choosing sonic over oscillating.
It is one of the best brushes here for sensitive gums. The sonic action is a high-frequency vibration rather than the scrubbing motion of a round-head brush, so it feels gentler while still cleaning thoroughly. The pressure sensor adds further protection against over-brushing.
Oral-B uses a small round head that oscillates and rotates, cleaning one tooth at a time with a brisk scrubbing feel. The DiamondClean uses a brush-shaped head that vibrates at high frequency, driving toothpaste and saliva between the teeth. Both clean well; the choice mostly comes down to which feel you prefer.
The premium pack includes the handle, a charging glass that the brush stands in to charge, and a travel case that also charges via USB. It is part of what justifies the higher price compared with a plainer sonic brush.
The DiamondClean 9000 is our best premium sonic brush and our top pick for sensitive gums. It cleans thoroughly while feeling notably gentle, the pressure sensor adds reassurance, and the charging glass and travel case make it feel genuinely special to own. The trade-offs are pricier heads and a feel that won't suit everyone — if you love a scrubbed-clean sensation, an Oral-B iO9 may please you more. And if you want sonic cleaning without the premium, the Ordo Sonic+ is the value alternative. To weigh up the two cleaning styles properly, read our sonic vs oscillating guide.