Dental emergency? Here’s what to do and who to call
Dentist Disaster

Electric toothbrushes

Philips Sonicare 4100 sonic electric toothbrush (HX3681)

By Philips Sonicare

A straightforward sonic brush with the two features dental organisations single out – a pressure sensor and a timer that paces you round the mouth – without app or mode extras.

Where to buy

Opens Philips Sonicare 4100 HX3681/33 (Philips UK) in a new tab. Prices and availability change, so check before you buy. Some of our links may be affiliate links. Affiliate disclosure.

Key features

  • Sonic brush: Philips states 31,000 brush strokes per minute
  • Built-in pressure sensor that warns you and reduces vibrations if you press too hard
  • SmarTimer (two minutes) and QuadPacer (30-second prompts)
  • Battery life of about 14 days, according to Philips
  • Slim handle; available in black or white

Features as described by the manufacturer, checked September 2026. We haven’t independently tested this product.

Can be useful for

A product can support daily care but can’t treat a dental problem on its own. See a dentist if symptoms persist.

Choosing electric toothbrushes

  • Prioritise a pressure sensor and a two-minute timer with 30-second prompts.
  • Check the cost and availability of replacement heads – you'll need a new one every three months.
  • Choose soft brush heads, especially if you have sensitive teeth or gums.
  • Extra modes, apps and cases are optional – a basic daily clean mode is enough for most people.
  • If you wear braces or have implants, ask your dental team which brush head they recommend.

Read our full buying guide for electric toothbrushes

Sources we used

Checked September 2026. Guidance changes, so always follow the advice of your own dental team. About our sources.