How to Clean Baby Teeth at 18 Months

Everyone · How-to · Updated October 1, 2026 · LearnLife Editorial

What do you need before starting to clean your 18-month-old’s teeth?

Before beginning to brush your toddler’s teeth, gather all the materials needed to make the process smooth and stress-free. Select a toothbrush made for toddlers, which has a small head and soft bristles to fit comfortably inside your child’s mouth and protect sensitive gums. Avoid medium or hard bristles that may cause discomfort or damage.

Choose a fluoride toothpaste designed specifically for children under two years old. Use only a tiny smear—about the size of a grain of rice—to reduce the risk of swallowing too much fluoride. This minimal amount still helps protect teeth against cavities. Keep a clean cup or small bowl of water nearby for rinsing the toothbrush or wiping your child’s mouth if needed.

Have a soft washcloth or tissue handy to gently wipe excess toothpaste and saliva after brushing. Find a comfortable, secure spot to sit your child, such as on your lap facing away from you or in a high chair, where their head can rest lightly against your chest. This positioning gives you control and allows a clear view of all teeth.

Prepare yourself to be patient and calm. Toddlers often resist toothbrushing, so using a gentle voice and positive phrases like, “Let’s make your teeth shiny!” can help your child feel safe and ready. Having everything ready before starting means less rushing and fewer interruptions.

What are the step-by-step instructions to clean baby teeth at 18 months?

Here is a detailed, step-by-step guide to brushing your toddler’s teeth effectively:

1. Wash your hands thoroughly. Clean hands prevent germs from spreading to your child's mouth. Say to your child, “I’m washing my hands to keep your teeth safe.”
2. Position your child comfortably. Sit your toddler on your lap facing away from you or in a high chair. Rest their head gently against your chest or hold their chin to keep the mouth open without force.
3. Apply a tiny smear of fluoride toothpaste. Use an amount about the size of a grain of rice on the toothbrush. Explain, “Just a little toothpaste to keep teeth strong.”
4. Hold the toothbrush properly. Hold the brush at a 45-degree angle to the gum line so bristles can clean both the teeth and the gums gently.
5. Brush all surfaces gently. Use circular or back-and-forth strokes to clean the front, back, and chewing surfaces of each tooth. Focus on a few teeth at a time to ensure thorough cleaning without rushing.
6. Brush for about two minutes. Use a timer, sing a 2-minute song, or use a child-friendly brushing app to keep track.
7. Encourage your child to spit or wipe. At this age, swallowing is common; help your child spit if they can, or gently wipe their mouth with a washcloth.
8. Rinse the toothbrush with water. Store it upright in a clean, dry place to air-dry, preventing bacteria buildup.
9. Offer praise and encouragement. Say, “You did a great job brushing your teeth!” to create positive associations.
10. Repeat twice daily. Brush teeth in the morning and before bedtime to maintain good oral health habits.

If your child resists, try distracting with a favorite song or toy, or let them hold the brush first. Keep sessions short and positive to build cooperation over time.

How can you tell if the cleaning worked well?

You can check the effectiveness of tooth cleaning by observing several signs. After brushing, teeth should look clean and not have visible food or sticky film, which is plaque. Gently run a clean finger over the teeth; they should feel smooth and free of roughness. Healthy gums appear pink and firm, not red, swollen, or bleeding.

Your child’s behavior can also be a clue. Comfortable, calm reactions during brushing often mean the technique is gentle and effective. Persistent fussiness or complaints of tooth pain may signal irritation or incomplete cleaning.

Watch for changes in your child’s breath. Fresh breath usually indicates good oral hygiene, while bad breath may mean plaque buildup. Regular dental checkups can confirm proper cleaning and prevent problems.

If you notice red or swollen gums, bleeding during brushing, or unusual white or brown spots on teeth, consult a pediatric dentist promptly.

What should you do when tooth cleaning doesn’t go as planned?

If your toddler resists brushing or becomes upset, try these practical strategies:

• Change the time. If bedtime brushing is stressful, try right after a bath or before a favorite story.
• Offer control. Let your child hold the toothbrush first or brush their own teeth briefly before you take over.
• Break it into steps. Brush a few teeth, then pause to comfort your child before continuing.
• Use distraction. Sing a brushing song, use a mirror, or let your child watch themselves while brushing.
• Make brushing fun. Use toothbrushes with characters or flavored toddler toothpaste.
• Stay calm and patient. If your child resists, stop and try again later instead of forcing it.
• Ask for help. If brushing remains a challenge or you notice gum bleeding or tooth pain, talk to a pediatric dentist for advice.

Consistency and gentle persistence will help your child gradually accept brushing as part of their daily routine.

How to adapt tooth cleaning for an 18-month-old’s development?

At 18 months, toddlers are exploring independence but still need adult help brushing their teeth well. Tailor your approach to fit their developmental stage:

• Use simple words. Say, “Let’s brush your teeth to keep them happy,” or “Rub-a-dub-dub, clean teeth!”
• Model behavior. Brush your own teeth alongside your child so they see how to do it.
• Offer choices. Let your toddler pick the toothbrush color or toothpaste flavor from a couple of options.
• Allow exploration. Let your child hold the toothbrush and “brush” their lips or cheeks before you brush their teeth.
• Make it a routine. Brushing at the same times each day helps your child know what to expect.
• Add fun. Use timers, songs, or sticker charts to reward good brushing.
• Be flexible. If your child is tired or cranky, try brushing at a different time or in a different place.

This approach encourages cooperation while ensuring teeth are cleaned properly.

Why use fluoride toothpaste for baby teeth?

Fluoride toothpaste helps protect baby teeth by making enamel more resistant to decay. Even the first few teeth benefit from fluoride’s protection against cavity-causing acids. Using a very small amount of fluoride toothpaste—about a grain of rice size—provides this defense safely, even if some toothpaste is swallowed.

If your child dislikes the taste, try toothpaste flavors designed for toddlers or mix a little with water to reduce flavor strength. Always supervise brushing to use only a small amount. If you have concerns about fluoride, ask a pediatric dentist for recommendations tailored to your child.

What if your 18-month-old has no teeth yet?

Some children do not have teeth by 18 months, which is normal. Even without teeth, clean your baby’s mouth twice daily to reduce bacteria and prepare for teeth arrival. Use a clean, damp washcloth or an infant gum brush to gently wipe the gums and tongue, especially after feedings.

This helps remove milk or food residue, keeping the mouth fresh and comfortable. It also helps your child get used to oral cleaning. Once the first tooth appears, start brushing with a toddler toothbrush and fluoride toothpaste following the steps above.

When should you schedule your baby’s next dental checkup?

Dental experts recommend that children visit a dentist by their first birthday or within six months after their first tooth emerges. Early dental visits help detect any issues early, provide professional cleaning guidance, and familiarize your child with the dentist.

During visits, the dentist will check your child’s teeth and gums and offer personalized advice on brushing, fluoride use, and diet to support healthy development. If you notice any concerns such as discoloration, persistent gum redness, or tooth pain before this visit, consult your pediatrician or dentist sooner.

Frequently asked questions

Can I use regular adult toothpaste for my 18-month-old?

It’s better to use toothpaste made for toddlers because it has less fluoride and milder flavors, which are safer if swallowed. Adult toothpaste can be too strong and increase the risk of fluorosis from swallowing.

How often should I brush my 18-month-old’s teeth?

Brush your toddler’s teeth twice a day, ideally once in the morning and once before bedtime, to help keep teeth clean and healthy.

What if my child bites the toothbrush during brushing?

Hold the toothbrush firmly but gently and continue brushing calmly. If biting is frequent, try a softer brush or shorter brushing sessions. Distraction with a favorite song or toy may help.

Is it okay if my child spits toothpaste or swallows it?

Swallowing small amounts of toddler toothpaste is generally safe when using only a smear. Encourage spitting but do not force it to avoid stress.

How do I handle tantrums during toothbrushing?

Stay calm and patient. Offer distractions like singing or a favorite toy. Let your child hold the brush or brush their own teeth briefly to make it fun and cooperative.

When should I start flossing my toddler’s teeth?

Begin flossing when two teeth start to touch each other, which varies by child. Ask your pediatric dentist when to start based on your child’s teeth.