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I gotchu fam, I’ve had 4 or 5 different ones.
Oral B Pro Expert, should be £10-£15. Uses AA batteries, which is desireable because when non-replaceable batteries fail on more expensive options, they’re non-replaceable. You can get rechargeable AAs anyway. I used one for several years until the motor gave out; the rest lasted 18 months at the most.
Pressure sensitivity is a useless gimmick: check with your dentist, mine recommends just enough pressure to touch the bristles to the tooth surface, let the tool do the work. Timers and varying speeds are also useless unless you’re prone to massively over brushing.
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go for a fast oral b one but without the bluetooth bollocks, you dont need an app to use a toothbrush.
some have a pressure indicator and even a power reduction if you go over pressure. this helps reduce wear and tear on heads. (though my previous brush became oversensitive and kept reducing power at normal forces but it was many years old, so i only discovered this when it was replaced.
if you travel a lot find one with a travel case. also watch how to use one, you dont need to do a brushing action as the toothbrush does it for you.
My dentist has said I should get an electric toothbrush. There seems to be a big variation in prices for them, what's worth going for?