How to choose a toothbrush: the decision guide
The toothbrush aisle has become unreadable: bristle hardness, sonic, oscillating-rotating, pressure sensors, connected apps. Yet the decision comes down to a handful of questions, and the first one weighs more than all the others put together.
The short answer
A brush with soft bristles, a small head, replaced every three months, used two minutes morning and evening without pressing. Electric or manual is secondary: both work. If you read nothing else, those four points cover the essentials of the subject.
1. Bristle hardness: the only truly decisive criterion
This is point no. 1, and the answer is nearly always the same: soft.
Intuition says the opposite, but it is wrong about what you are removing: dental plaque is a soft film, not a crust. Fine, flexible filaments break it up perfectly and slip along the gum line, where it accumulates. Anything already mineralised, no brush will remove — see dental plaque or tartar.
Medium and hard bristles, for their part, combine two drawbacks as soon as you press:
- Wear on the enamel and the neck of the tooth, that thin zone where tooth meets gum, exposing a surface that reacts to hot and cold;
- Gum recession, which leaves the root bare — damage that does not repair itself.
This damage is slow and painless at first, so it is spotted late. Detail in soft, medium or hard bristles and brushing too hard.
The labels "soft", "medium" and "hard" are not standardised from one brand to the next: one brand's medium can feel like another's soft. When in doubt, soft remains the safest bet.
Medium is not a mistake on healthy gums with a light touch. Hard bristles, on the other hand, bring no benefit that offsets their risks.
2. Electric or manual: what really changes
Let us be blunt: a manual toothbrush used well beats an electric toothbrush used badly. The device makes up for neither a sloppy technique, nor a forty-second brushing, nor areas that are systematically forgotten.
What it does bring is concrete: a timer, which settles the most ordinary problem of brushing — we stop too soon; the movement done for you, which discourages scrubbing; a pressure sensor on some models, in our view the strongest argument in its favour; a real gain for hands with limited mobility.
If you are already regular and light-handed, switching will not bring you much; if you press, cut it short or forget the back molars, it corrects real faults. See electric or manual toothbrush.
3. Sonic or oscillating-rotating
Both families clean effectively, and the public debate is more clear-cut than the facts. The sonic brush has an elongated head, close to a manual one, vibrating at very high frequency: the movement stays a sweep, the grip is familiar. The oscillating-rotating brush has a small round head that pivots and pulses, tooth by tooth: very targeted cleaning, a more mechanical sensation.
We lean towards sonic for fragile gums, because the contact is less localised — that is not a universal truth, and it is developed in sonic or oscillating-rotating toothbrush, then brand by brand in Fairywill vs Oral-B. Be wary of the vibration count printed on the box: a higher number does not give you a cleaner mouth.
4. Head size: small, almost always
An underrated criterion, yet simple to settle. A large head looks like better value, but it reaches the back faces of the last molars poorly — exactly where plaque settles.
The rule of thumb: the head should cover one to two teeth and sit at 45 degrees against the gum without the handle bumping into your cheek. If you have to force your mouth open to reach the back, it is too big — replacement heads included.
5. When to replace your brush (or brush head)
The rule is three months, but that is a ceiling, not an appointment. The real signal is the bristles: as soon as they splay or flatten, the brush no longer cleans the gum line, it slides over it. After an infection, replace it without waiting — detail in how long to keep a toothbrush.
If your bristles flatten before three months, the brush is not at fault: your pressure is. As for upkeep, rinsing and letting it dry head up settles the essentials; on accessories, see UV steriliser, useful or gimmick.
6. The special cases
Bleeding gums. The reflex is to avoid the area: that is the mistake. A gum bleeds because plaque is inflaming it, and the plaque will not go away if you spare it. See gums that bleed when brushing.
Gum recession. Soft bristles are compulsory, minimal pressure, a low-abrasion toothpaste: the exposed root is softer than enamel. See receding gums and reversing gum recession.
Teeth sensitive to cold. Soft bristles, "sensitive" mode if your brush has one; here, when you brush counts as much as the brush itself. See teeth sensitive to cold and gentle toothpaste for fragile enamel.
Fixed braces. Soft bristles with a small head, but that is not enough: interdental brushes become essential around the brackets, and brushing time increases noticeably. With aligners, brush before putting the trays back in.
Children. Soft or extra-soft, a very small head, a handle suited to the hand: the enamel of baby teeth and newly erupted permanent teeth is thinner. Adult supervision until fine coordination is there.
Implants, crowns, bridges. Soft bristles, plus interdental cleaning suited to the spaces created by the prosthetics; the diameters are given by your practitioner.
7. What matters more than the brush itself
Pressure. Beyond light contact, pressing removes no more plaque: it wears the enamel down and pushes the gum back. The fix is immediate — hold the brush like a pen, never like a broom handle.
Technique. Bristles at 45 degrees towards the gum, small movements from pink to white, never firm horizontal scrubbing, every surface including the inner ones, two minutes, twice a day. Timing counts too: after an acidic breakfast, brushing straight away can worsen the wear of weakened enamel — see before or after breakfast.
What the brush does not reach. No brush cleans the surfaces between the teeth: they are out of reach of the bristles. Floss, interdental brushes or a water flosser handle those — see interdental brushes or floss, water flosser or floss and the five-minute interdental routine. Same logic for the tongue and the tongue scraper.
The table: which brush for which profile
| Your profile | Recommended brush | The point to watch |
|---|---|---|
| Healthy teeth and gums | Soft, small head, manual or electric | Consistency matters more than the model |
| You press hard | Electric with a pressure sensor | The sensor, not the modes |
| Gums that bleed | Soft, sonic on gentle mode | Do not avoid the area that bleeds |
| Gums that are receding | Extra-soft, minimal pressure | Low-abrasion toothpaste |
| Teeth sensitive to cold | Soft, sensitive mode | Wait after an acidic food |
| Fixed braces | Soft, small head, plus interdental brushes | Noticeably longer brushing |
| Clear aligners | Standard soft brush | Brush before putting the trays back in |
| Child | Soft or extra-soft, very small head | Supervision by an adult |
| Implants, crowns, bridges | Soft, plus interdental cleaning | Diameters given by the practitioner |
| Limited hand mobility | Electric, wide handle | The case where it changes the most |
| Tight budget | Manual soft brush, replaced every 3 months | No inferiority if the technique follows |
Where ÉclatDent brushes fit in
We sell sonic electric toothbrushes, with soft brush heads, a timer and gentle modes: the combination most consistent with everything above — the right bristles, plus a mechanism that discourages pressing.
But if your brushing is already good with a soft manual brush, keep it: your budget is better placed in cleaning between the teeth. For the formula that goes with it, see our toothpaste guide or the two-minute quiz.
Frequently asked questions
Does an electric toothbrush really clean better than a manual one?
It makes good brushing easier rather than replacing it: the gap is small for someone already regular, real for someone who cuts it short or who presses. A manual brush used well remains superior to an electric one used badly.
Do hard bristles remove tartar better?
No. Tartar is mineralised plaque: only a professional scaling removes it. Hard bristles change nothing there and damage the enamel and the gum along the way.
Do you have to pay a lot for a good electric toothbrush?
No. The features that count — timer, soft bristles, a properly sized head, a pressure sensor — exist at entry level. What drives the prices up are the connected app and the multiple modes: comfort, not effectiveness.
Extra-soft: does it clean enough?
Yes, provided you give it the time required. It is made for fragile gums, recession and the aftermath of periodontal treatment; on a healthy mouth, it brings nothing extra.
How often should you change the head of an electric toothbrush?
At the same rhythm as a manual brush, around three months, and sooner if the bristles splay. As the heads are smaller, watch the wear rather than the calendar.
Is a bamboo toothbrush a better choice?
It is an ecological choice on the handle, not a difference in performance for your mouth: the criteria stay the same, and a bamboo brush with hard bristles is still a bad brush.
Can you share a toothbrush?
No: sharing transfers bacteria and, when gums bleed, blood. Also avoid letting the heads touch in the same cup.
Which brush when your gums hurt?
Soft or extra-soft, very light pressure, without stopping brushing the painful area. If the pain or the bleeding persist beyond two weeks despite a correct routine, the cause is no longer the brush: see a dentist.
Where to start
If your brush is medium or hard, switch to soft: it is the move that pays off most for the least effort. Then look at the state of the bristles after a month — if they are splayed, work on your pressure. Electric only comes after that; cleaning between the teeth, before.
This information is general in nature and does not replace the advice of a dentist. In case of persistent bleeding, gum recession, pain or after a procedure, follow the recommendations of your practitioner.