Start cleaning your baby’s mouth from birth, even before the first tooth appears. In those early months, wiping the gums with a soft damp cloth or infant toothbrush after feedings removes bacteria and gets your baby used to the sensation. Once that first tooth breaks through, usually around 6 months, it’s time to switch to an actual toothbrush with fluoride toothpaste.
What You Need to Get Started
Once teeth start appearing, use a soft-bristled toothbrush with a small head that fits comfortably inside your baby’s mouth. Look for short handles that prevent the brush from reaching too far back, and check that the bristles are secure and won’t fall out. Silicone finger brushes and banana-shaped teethers work well as training tools to get your baby comfortable with the feeling of something in their mouth, but they don’t remove plaque as effectively as a proper soft-bristled brush.
For toothpaste, use a fluoride formula from the very first tooth. The recommended amount for babies and children under 3 is a smear about the size of a grain of rice. Once your child turns 3, increase to a pea-sized amount. That tiny smear is enough to protect enamel while keeping the amount safe if swallowed, which babies will inevitably do.
How to Position Your Baby
Getting a clear view inside your baby’s mouth makes all the difference. The simplest solo approach is to cradle their head in the crook of your non-dominant arm, with their legs draped across your lap. This gives your dominant hand free range with the toothbrush while keeping them secure and giving you a good angle to see their teeth.
If you have a partner available, try sitting face to face on the floor or couch. Your baby lies back from one person’s lap into the other’s, so one person holds their hands gently against their belly while the other does the brushing. This is especially helpful once your baby gets bigger and squirmier. For toddlers who actively try to escape, you can sit on the floor with your legs gently over their arms or legs to keep them still while you brush. It looks a bit dramatic, but it’s safe and effective for the thirty seconds to two minutes you need.
The Brushing Technique
Aim for about two minutes of brushing, twice a day. The most important session is right before bed, since saliva production drops during sleep and bacteria have more opportunity to cause damage overnight. The second session can fit wherever works best in your routine.
Hold the bristles at roughly a 45-degree angle where the tooth meets the gum line. Move the brush in gentle, small circles across the outer surfaces, then the inner surfaces, then use a back-and-forth motion on the flat chewing surfaces. You don’t need much pressure. Let the bristles do the work. If you’re using a children’s electric toothbrush, move the head slowly from tooth to tooth along the gum line without pressing hard or scrubbing.
Babies can’t spit on command, so don’t worry about rinsing. Simply wipe away any excess toothpaste with a cloth. The grain-of-rice amount is small enough that swallowing it is not a concern. As your child gets older and learns to spit, you can encourage them to spit out the foam, but rinsing with water afterward actually washes away fluoride, so skipping the rinse is fine.
Brushing During Teething
Teething makes gums tender and swollen, which can turn brushing into a battle. On particularly rough days, you can soothe the area first by gently rubbing the gums with a clean finger, a chilled spoon, or a moist gauze pad. A solid rubber teether (avoid liquid-filled or rigid plastic ones that could crack) can also help your baby chew through the discomfort before you attempt brushing. Use a lighter touch on inflamed areas but don’t skip brushing entirely. Newly erupted teeth are especially vulnerable to decay.
When Your Baby Fights the Toothbrush
Almost every baby goes through a phase of clamping their mouth shut or turning their head away from the brush. This is normal and not a reason to stop. A few strategies help. Let your baby hold a second toothbrush while you do the actual cleaning, since having something to chew on themselves makes the process feel less one-sided. Singing a short song gives them something to focus on and helps you time the two minutes. Brushing your own teeth at the same time lets them see it as a shared activity rather than something being done to them.
Consistency matters more than perfection. Even on nights when you only manage 30 seconds, that’s better than skipping. Over time, the routine becomes familiar, and most toddlers stop resisting once brushing is simply what happens before bed every single night.
How Long You’ll Need to Help
Children lack the fine motor control to brush their own teeth effectively until around age 6 or 7. Before that, they can practice holding the brush and mimicking the motions, but a parent still needs to do the real cleaning. Even after they start brushing independently, supervise to make sure they’re spending a full two minutes and reaching the back molars, which are the most cavity-prone teeth in young children.
Scheduling the First Dental Visit
Your child should see a dentist for the first time between the appearance of their first tooth and their first birthday. This visit is less about treatment and more about catching any early issues, getting personalized advice on fluoride, and establishing a dental home so future visits feel routine rather than scary. Most pediatric dentists will let your baby sit in your lap during the exam.