Toddlers have up to 20 baby teeth, also called primary teeth. Most children reach that full count by age 3, though the timeline varies. Those 20 teeth break down into 8 incisors (the front teeth), 4 canines (the pointed ones), and 8 molars (the flat chewing teeth in the back).
When Each Tooth Comes In
Baby teeth don’t arrive all at once. They typically start breaking through the gums around 6 months of age, beginning with the lower front teeth. From there, teeth tend to appear in a rough front-to-back order over the next two and a half years. By your child’s first birthday, they’ll usually have a handful of front teeth. By 18 months, you can expect to see some of the first molars. The canines (the pointy teeth between the front teeth and molars) generally fill in between 16 and 22 months.
The last teeth to arrive are the second molars, the big ones in the very back of the mouth. These come in between about 23 and 33 months. Upper second molars tend to appear slightly later than the lower ones. Once those are in, your toddler has their complete set of 20.
What the Two-Year Molars Feel Like
The second molars are often the most uncomfortable teeth for toddlers because they’re large and sit far back in the mouth. Common signs include irritability, extra drooling, chewing on objects or clothing, and visibly red, swollen gums. Some children even complain of headaches. These symptoms overlap with earlier teething, but parents often notice they’re more intense this time around because of the size of the teeth pushing through.
Cold teething rings, gentle gum massage, and age-appropriate pain relief can help. This final stretch of teething is temporary, usually resolving within a few days to a couple of weeks per tooth.
Why Some Toddlers Have Fewer Teeth
If your toddler seems behind the typical timeline, that’s not automatically a concern. There’s a wide range of normal, and some perfectly healthy children simply get their teeth later. However, certain factors can cause genuine delays in tooth eruption. Premature birth or low birth weight is one of the more common causes. Nutritional deficiencies, particularly a lack of vitamin D, can slow things down and affect enamel quality. Thyroid or pituitary conditions can also delay eruption, as can some genetic conditions like Down syndrome.
If your child has no teeth at all by 12 months or seems significantly behind, it’s worth mentioning at their next checkup. A dental X-ray can confirm whether teeth are forming under the gums and simply running late.
Gaps Between Teeth Are Normal
Many parents notice spaces between their toddler’s baby teeth and wonder if something is wrong. Those gaps are actually a good sign. Baby teeth are smaller than the permanent teeth that will eventually replace them, so spacing in the primary set means there’s room for the larger adult teeth to come in straight. Tightly packed baby teeth with no gaps can actually increase the chance of crowding and alignment problems later. A spaced-out smile in a toddler is considered ideal.
Caring for Those First 20 Teeth
Baby teeth matter more than many parents realize. They guide the permanent teeth into the correct position and help with speech development and chewing. Decay in baby teeth can cause pain, infection, and early tooth loss, which may lead to crowding when adult teeth arrive.
Start brushing as soon as the first tooth appears, using a grain-of-rice-sized smear of fluoride toothpaste twice a day until age 3. After that, you can increase to a pea-sized amount. The American Dental Association recommends scheduling your child’s first dental visit between the appearance of their first tooth and their first birthday.
When Baby Teeth Start Falling Out
Your toddler’s full set of 20 teeth will serve them for several years. Around age 6, the first baby teeth start to loosen and fall out as permanent teeth push through underneath. The first permanent molars also appear around this age, emerging behind the existing baby teeth rather than replacing them. It’s perfectly normal for a child to lose their first tooth anywhere from age 4 to age 8. The full transition from baby teeth to the 32 adult teeth continues into the early teen years.