Most 18-month-olds have between 8 and 16 teeth, with 12 being a common middle ground. The exact number varies widely from child to child, and a few teeth more or less than that range is rarely a sign of a problem. What matters more than hitting an exact count is understanding which teeth have likely come in, which ones are on deck, and how to care for them.
Which Teeth Are In by 18 Months
Baby teeth follow a fairly predictable sequence, even though the timing shifts from one child to the next. The lower front teeth (central incisors) typically arrive first, between 5 and 9 months. The upper front teeth follow at 8 to 12 months. By around 12 to 15 months, most toddlers also have their upper and lower side teeth (lateral incisors), bringing the total to eight.
The next wave is the first molars, those wider teeth toward the back of the mouth. These usually push through between 10 and 16 months. If all four first molars are in, your toddler now has 12 teeth. Then come the canines, the pointed teeth between the incisors and molars, which emerge between 16 and 20 months. An 18-month-old right in the middle of canine eruption might have anywhere from 12 to 16 teeth, depending on how many canines have broken through.
So if your child has 10 teeth or 14 teeth at 18 months, both are perfectly normal. The sequence matters more than speed. As long as teeth are arriving in roughly the right order, the timeline can stretch or compress without concern.
What Molar and Canine Teething Looks Like
At 18 months, the teeth coming in are bigger than those early incisors, and many parents notice that molar and canine eruption seems more uncomfortable. Your toddler may have red, swollen gums where the tooth is pushing through, along with increased drooling, more chewing on objects, fussiness, and disrupted sleep. A mild temperature below 38°C (100.4°F) is common. Some children get a flushed cheek on the side where the tooth is emerging, or a facial rash from excess drool. Ear rubbing is another frequent sign, since the pressure in the gums can radiate.
These symptoms tend to come and go over a few days as each tooth works its way to the surface. If your child has a fever above 38°C, persistent diarrhea, or seems genuinely unwell, that’s more likely an illness than teething.
Soothing Sore Gums at This Age
Because your child is over 12 months, you have a few more options than you did during early teething. Rubbing the gums firmly with a clean finger or wet gauze for a couple of minutes can relieve pressure. You can also wrap a small piece of ice in a wet cloth and rub it over the sore spot. Chilled (not frozen) teething rings, wet washcloths, or pacifiers work well too. At this age, offering chilled soft fruit like banana slices or berries inside a mesh feeder is another option.
If your toddler is especially miserable, children’s acetaminophen or ibuprofen can help, but limit use to one or two days. Avoid teething gels containing benzocaine or lidocaine, which can be dangerous for young children. Homeopathic teething tablets haven’t been shown to work. And skip teething necklaces, bracelets, or anklets entirely, as they carry real risks of choking, strangulation, and mouth injury.
When Fewer Teeth Could Be a Concern
The normal window for a first tooth is surprisingly wide, stretching from 4 to 15 months. Some toddlers are simply late bloomers. If your child had no teeth at all by 9 months, that’s the point where a pediatric dentist visit is recommended. By 18 months, most late teethers have at least a few teeth, and the rest typically catch up without intervention.
If your 18-month-old has significantly fewer teeth than expected, or if teeth seem to be arriving out of sequence, a dentist can take X-rays to confirm the teeth are developing beneath the gums. In rare cases, delayed eruption points to a genetic, developmental, or nutritional issue that benefits from early identification. But for the vast majority of toddlers on the slower end, the teeth simply arrive on their own schedule.
Caring for New Teeth
Even though these teeth are temporary, they’re vulnerable to decay from the moment they appear. Brush your toddler’s teeth twice a day with a soft-bristled toothbrush and a smear of fluoride toothpaste about the size of a grain of rice. That tiny amount is the recommendation from the American Academy of Pediatrics, the American Dental Association, and the American Academy of Pediatric Dentistry for all children under three.
One of the biggest decay risks at this age is bottle feeding at bedtime. Cow’s milk and formula both contain sugars that pool around the teeth while a child sleeps, when saliva production drops. Children who are bottle-fed to sleep at this stage end up with nearly twice as many teeth affected by early childhood decay compared to those who aren’t. If your toddler still uses a bottle, aim to transition to a cup and avoid sending them to bed with anything other than water.
The First Dental Visit
The American Academy of Pediatric Dentistry, the ADA, and the AAP all recommend a child’s first dental visit during their first year of life. If your 18-month-old hasn’t been yet, it’s not too late, but scheduling a visit soon is a good idea. These early appointments are brief and low-key. The dentist checks for signs of decay, evaluates how the teeth are coming in, and helps you establish what’s called a “dental home,” a consistent place for preventive care as your child grows. It’s also a chance to ask about anything that’s been on your mind, whether that’s the number of teeth, spacing, or brushing technique.