How to use an electric toothbrush, and the one habit that undoes it
Most people brush an electric toothbrush like a manual one, which is the fastest way to wear a notch into the necks of their teeth. Hold it still, move it slowly, and stop pushing. Here is the whole method, with a timer you can run while you brush.
Written by Nora Lindqvist. Last checked and updated .
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If you read nothing else
Hold the bristles against the tooth at a slight angle into the gum line, with no more force than it takes to hold a pen. Move about one tooth every two seconds and let the brush do the scrubbing. Thirty seconds in each of the four corners, outside surfaces then inside, twice a day. Spit the toothpaste out and skip the rinse.
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A powered brush is not a faster manual brush. The motor has already replaced the back and forth motion of your hand, so if you keep making that motion you are now doing it twice as hard as before, with a head that is already moving thousands of times a minute. That is how people end up with worn notches at the gum line and gums that have crept back half a millimetre a year since they switched.
The method below takes about a week to feel normal and then stops being something you think about.
Two minutes, four corners
2:00
Press start and begin at the top right.
Thirty seconds a corner. Hold the bristles against the tooth at the gum line and stop pushing; the head does the scrubbing, your hand only moves it along.
The five things that matter
Angle, not pressure. Point the bristles slightly into the gum line, around 45 degrees, so the tips sit in the little groove where the gum meets the tooth. That groove is where plaque starts and where a brush held flat against the tooth never reaches.
Hold it still, move it slowly. Rest the head on one tooth, count two seconds, slide to the next. On an Oral-B style round head this is literal: one tooth at a time. On a Sonicare style head you cover two teeth at once and glide along the arch rather than stopping.
Let the handle tell you about force. If your brush has a pressure warning, treat a red light or a change in the buzz as a hard stop, not a suggestion. If it has none, the test is simple: the bristles should fan out a little, not flatten into a mat.
Four corners, thirty seconds each. Top right, top left, bottom left, bottom right. Outside surfaces first, then the inside of the same corner, then the chewing surfaces on the way past. Nearly every powered brush pauses briefly every thirty seconds to pace you.
Spit, do not rinse. Rinsing with water washes the fluoride off the teeth within seconds of putting it there. Spit the foam out and leave the rest.
The order that catches the places people miss
Most people brush the outside of their front teeth beautifully and neglect three places: the inside of the lower front teeth, where tartar builds first; the outer surfaces of the upper back molars, where the cheek gets in the way; and the back face of the last molar on each side.
A sequence that fixes all three: start on the inside of the lower front teeth while you still have patience, work backwards along the inside of one side, come around the back of the last molar, then forward along the outside. Repeat on the other side, then do the same on top. Finish with the chewing surfaces, which take seconds.
What to change for your own mouth
A brush is a tool with settings, and most people never touch them. The panel below is what we would change for each common complaint, including the part a brush cannot help with.
What is actually going on in your mouth
A brush canClear the plaque at the gum line that is causing the inflammation, which is what stops the bleeding.
A brush cannotTreat gum disease that has already reached the bone. That needs a dentist.
Setting and headSensitive or Gum Health mode, a soft or gum care head, and no extra pressure. Expect two weeks.
Start withPhilips Sonicare 4100Price
A brush canStop the mechanical part of the damage by removing the sideways scrub and warning you about force.
A brush cannotGrow the gum back. Recession does not reverse on its own.
Setting and headA pressure sensor you can see, a soft head, and the gentlest mode. Angle the bristles into the gum line rather than along it.
Start withOral-B iO Series 3Price
A brush canLet you clean exposed necks of teeth without scrubbing them, and run at a lower power.
A brush cannotSeal the dentine. That is what a sensitivity toothpaste or a dentist does.
Setting and headLowest intensity, a sensitive head, and a fluoride toothpaste for sensitivity. Skip whitening heads.
Start withPhilips Sonicare 5900Price
A brush canLift surface stain better than a manual brush, especially with a polishing head.
A brush cannotChange the natural colour underneath. No brush does.
Setting and headA whitening head two or three times a week, a normal head the rest of the time.
Start withOral-B iO Series 3Price
A brush canSlow it down by clearing plaque before it hardens, especially behind the lower front teeth.
A brush cannotRemove tartar once it has set. Only a scale and polish does that.
Setting and headAn oscillating head suits heavy depositors; spend extra seconds on the inside of the lower front teeth.
Start withOral-B Pro 1000Price
A brush canClean around brackets far faster than a manual brush, which is where decalcification starts.
A brush cannotReach between the wire and the gum. You still need interdental brushes or a water flosser.
Setting and headAn orthodontic head where one exists, a gentle mode, and a slow pass along the bracket line.
Start withPhilips Sonicare 7300Price
A brush canDo the work while you hold the handle still, which is the whole point for a weak or painful grip.
A brush cannotHelp if the handle is thin and slippery. Weight and grip matter more than modes here.
Setting and headA wider handle, a simple button, a stand you can drop it on rather than a cable to line up.
Start withOral-B Pro 1000Price
A brush canClean the margin of a crown or the neck of an implant gently and consistently.
A brush cannotFix a leaking margin or a loose implant. Both are dentist work.
Setting and headSoft or gum care head, gentle mode, and keep abrasive whitening heads away from the margin.
Start withPhilips Sonicare 5900Price
The first two weeks
Days one to three feel wrong. A sonic brush in particular tingles, and the noise conducts into your skull through your teeth. People who quit usually quit here. Use the gentlest mode, and if your handle has an EasyStart style ramp, leave it on.
Your gums may bleed more at first. Inflamed gum bleeds when it is disturbed, and you have just started disturbing it properly. Keep going gently. Bleeding that is still there after two weeks means a dentist, not a different brush.
Expect to use less toothpaste. A pea, not a stripe across the head. More foam makes it harder to see what you are doing and tempts you to rinse.
Your technique will drift back. Around week three most people start scrubbing again without noticing. If your brush has a pressure light, glance at it in the mirror once a week.
Questions about the machine itself
Should the brush be on before it touches my teeth? Put the head in your mouth first, then switch on. It saves the mirror.
Does the mode really matter? Less than the marketing suggests. Sensitive and gum modes lower the power, whitening modes raise it and usually pair with a polishing head. Three modes is plenty, and most owners of seven mode brushes use one.
How long until I replace the head? Three months, or as soon as the bristles start to splay. A worn head cleans badly and is harsher on the gum line, which is the opposite of what you bought. Our guide to brush heads has the prices and which heads fit which handle.
Can I still floss? Yes, and you should. No powered brush reaches between tight contacts. A water flosser helps around bridges and braces, but it is an addition rather than a replacement.
How do I clean the brush itself? Rinse the head and the neck under the tap with the brush running for a second, stand it up to dry, and wipe the charging base occasionally. Closed travel cases are for travel, not for storage.
Doing it right and still unhappy?
If your gums are sore after two careful weeks, the usual culprits are a head that is too firm or a mode that is too strong, not the handle. Swap to a sensitive or gum care head from the same family before you spend anything, then drop a power level. If that fails, a sonic brush usually feels kinder than an oscillating one on tender gums; our picks for sensitive teeth start there.
What you cannot fix with technique
Brushing well does not remove tartar once it has hardened, does not reach below the gum line in a deep pocket, and does not reverse recession that has already happened. It also does nothing about decay between teeth, which is where most adult cavities start. Those are reasons to see a hygienist, not reasons to brush harder.
Will it wake the person still asleep?
A classic geared Oral-B is the loudest brush here and it rattles through a wall. An iO or any sonic handle is a hum you can brush next to someone with.
What we checkedThe iO range swapped gears for a magnetic drive, which is the single biggest change in noise between Oral-B handles.
Our pick for thisPhilips Sonicare 5900Price
Is it really better than a $3 manual brush?
On average yes, by a modest amount, and the gap is widest for people who rush. The timer is doing as much work as the motor.
What we checkedReviews of the clinical trials put powered brushes ahead of manual ones on both plaque and gum inflammation, with the largest reported effects on the oscillating style.
Our pick for thisOral-B Pro 1000Price
Odds and ends worth knowing
Two minutes, twice a day, split into four thirty-second corners. Almost every powered brush pauses to pace you.
Should I move an electric toothbrush back and forth?
No. Guide it slowly from tooth to tooth and let the head make the movement. Scrubbing adds nothing and wears the necks of the teeth.
How hard should I press with an electric toothbrush?
About as hard as you would hold a pen. The bristles should bend slightly, not flatten. A pressure warning exists because almost everyone presses too hard at first.
Why do my gums bleed after switching to an electric toothbrush?
Usually because the gum line is inflamed and is being cleaned properly for the first time. It normally settles within two weeks of gentle brushing. If it does not, see a dentist.
Should I rinse after brushing?
Spit the toothpaste out and leave it. Rinsing with water removes the fluoride you just applied.
Do I still need to floss if I use an electric toothbrush?
Yes. No brush head fits between tight teeth. Floss, interdental brushes or a water flosser all work; the one you will actually use is the right one.
Is it bad to use an electric toothbrush twice a day?
No. Twice a day is the recommendation for powered and manual brushes alike. What causes damage is force, not frequency.
When should I replace the brush head?
Every three months, or earlier if the bristles splay or you have been ill.
