You're scrolling through an online shop, looking at two different head shapes. One is long, like the one on an ordinary toothbrush. The other is small and round. The prices are much the same, the descriptions are full of technology, and you still don't know which to pick.
Read on and in a few minutes you'll know how they differ and, more importantly, what should decide it.
So how do the two actually differ?
The difference is in what the head does.
A sonic toothbrush has a long head, shaped much like the one on a manual brush. The bristles vibrate very fast from side to side. You move it slowly along your teeth and it does the work for you.
A brush with a round head works differently. The head is small, it cups one tooth at a time and turns alternately left and right. The technique is different as a result. Place it, wait a moment, move on to the next tooth.
So much for the theory.
Why is it such a hard choice?
Because both of them work.
An electric toothbrush of either kind handles plaque and gum inflammation better than a manual one. The differences between the two electric types are small, and experts are still arguing about how much they matter. This is the most-repeated part of the whole topic, so let's get it out of the way: nobody can honestly hand you a clear winner. Which is good news, really, because it means you can't get this wrong.
So what should decide it?
Once you drop the question of which one cleans better, what's left are the things that will actually decide whether you're happy with it.
Head shape and technique. If you're used to sweeping a brush along your teeth, a sonic one will feel right straight away. If you don't mind slowing down and giving each tooth a few seconds of its own, you'll get on fine with a round head. Picture yourself doing it at the sink. It's a better guide than any spec table.
Sound and how it feels. A sonic brush sounds like a quiet hum, while a round head is louder and feels more insistent. Some people find the first go with a sonic brush ticklish. It usually passes within a few days.
Timer and intervals. Two minutes is two minutes, and almost nobody guesses it right without a timer. A prompt every thirty seconds helps too. It stops you spending half the time on your front teeth and forgetting the back molars.
Where you'll take it. A toothbrush that stays at home when you go away for a week is no use to you.
The Truelife SonicBrush Compact covers all of that. It has a timer with thirty-second intervals, four modes including the gentler Sensitive, and it fits into a travel case. The heads have blue bristles that fade away with use, so you can see when it's time to change them without pencilling it into your calendar.
The thing people forget about
Now for the important part. Most people worry about the head shape, when something else has far more influence on the health of your gums. How hard you press.
It sounds like a small thing. It isn't. Press too hard and your gums pay for it, whichever brush you're holding. And hardly anyone notices themselves doing it, because more pressure subconsciously feels like a more thorough clean. It isn't.
That's why a brush that tells you is worth having. The Truelife SonicBrush Clean70 UV has a SmartPressure sensor that watches your pressure and shows it in colour. Blue means you've got it right, green means you're at the limit, and red, along with a gentle vibration, means ease off. The indicator is visible from the front and the back, so you can check your technique in the mirror. The case also sterilises the heads with UV light between brushes, which you'll appreciate most when you travel.
A sensor isn't a condition for healthy gums. It's a nudge that teaches your hand the right pressure. After a few weeks you'll have the feel for it yourself.
And a word on technique, so it all adds up
Even the best toothbrush won't rescue poor technique.
Place the bristles where the tooth meets the gum, at a slight angle. Work your way slowly from tooth to tooth and let the brush do its job. Don't scrub. That's the most common mistake with electric brushes and the quickest route to sore gums.
One more thing, so you're not left wondering. No toothbrush, electric or manual, properly cleans between your teeth. For that you need interdental brushes, floss or a water flosser. We've covered technique in more detail in a separate article.
FAQ
Is a sonic toothbrush better than one with a round head?
There's no clear winner between them. Both types handle plaque and gum inflammation far better than a manual brush, and the differences between them are small. Choose the one that feels right in your hand and that you'll stick with.
Does more movements per minute mean a better clean?
On its own, no. The number on the box guarantees nothing, because the head, your technique and how long you brush all matter too. A brush with a lower number can clean just as well as one with double that.
Will an electric toothbrush damage my gums or enamel?
With normal use, no. The trouble doesn't come from the type of brush but from too much pressure and scrubbing. A soft head, a gentle stroke and a brush with a pressure sensor all help.
How often should I change the head?
Change the head roughly every three months. Worn bristles fray and clean considerably less well. Some heads have coloured bristles that fade and let you know on their own.
Does an electric toothbrush replace cleaning between the teeth?
No, it doesn't. No toothbrush reliably reaches between your teeth. Pair it with interdental brushes, floss or a water flosser.
Pick the one you'll stick with
Long head or round one? Either way you'll end up with a toothbrush that runs rings around manual brushing. The gap between the two types is smaller than the gap between someone who brushes properly for two minutes and someone who rushes it in thirty seconds.
Choose by how it sits in your hand, by the sound of it, and by what you'll actually enjoy picking up each evening. Regularity will do the rest.
