Most 9-month-olds have between zero and four teeth, with two being the most common count. The lower front teeth typically appear first, usually between 5 and 8 months, followed by the upper front teeth between 6 and 10 months. If your baby has no teeth yet at 9 months, that’s still within the normal range.
What’s Typical at 9 Months
The two bottom front teeth (lower central incisors) are almost always the first to break through, arriving for most babies between 5 and 8 months. The two upper front teeth come next, typically between 6 and 10 months. So at 9 months, a baby who’s right on schedule might have two bottom teeth and two top teeth just starting to poke through.
The next teeth in line are the upper lateral incisors, the ones flanking the top front teeth. Those begin appearing around 8 to 12 months. The lower lateral incisors follow between 7 and 10 months. This means some 9-month-olds are already working on their third or fourth tooth, while others are still waiting for their first. Both scenarios are perfectly normal. As the American Academy of Pediatric Dentistry notes, “many otherwise normal infants do not conform strictly to the stated schedule.”
Why Some Babies Get Teeth Earlier or Later
Genetics plays the biggest role, but researchers have identified several other factors that influence timing. Babies born at a longer gestational age and with a larger birth size tend to get their first tooth earlier and have more teeth by their first birthday. Premature babies, on the other hand, often see their first tooth later.
Ethnicity matters too. A large study found that children of Asian mothers had their first tooth later and had fewer teeth at age one compared to children of white mothers. Breastfeeding duration also has an effect: babies breastfed for seven months or longer tended to have delayed eruption and fewer teeth at ages one and two. Maternal smoking during pregnancy was linked to earlier eruption, with those children having more teeth at one year.
None of these factors signal a problem. They simply explain why two healthy 9-month-olds can look so different when they smile.
When No Teeth Could Be a Concern
A 9-month-old with zero teeth does not need any special evaluation. The threshold pediatric dentists watch for is the first birthday. If your child hasn’t erupted a single tooth by 12 months, it’s worth scheduling a dental visit to rule out uncommon issues like nutritional deficiencies or conditions affecting tooth development. In most cases, late bloomers simply catch up over the following months with no intervention needed.
Regardless of when teeth appear, the current recommendation is to see a dentist by your child’s first birthday or within six months of the first tooth coming in, whichever happens first.
Recognizing Teething Symptoms
If your 9-month-old is drooling more than usual, gnawing on everything in sight, or fussier than normal, teething is the likely explanation. The gums where a tooth is about to break through often look red and swollen, and your baby may have trouble sleeping or lose interest in food temporarily.
One important distinction: teething can cause a very slight increase in temperature, but it does not cause a true fever. If your baby’s temperature rises above 100.4°F (38°C), something else is going on. Diarrhea, vomiting, and rashes are also not teething symptoms, even though the timing sometimes overlaps with new teeth.
Safe Ways to Ease Teething Pain
The simplest relief is also the safest. Rubbing your baby’s swollen gums with a clean finger applies gentle counterpressure that can soothe the discomfort. A firm rubber teething ring gives your baby something to chew on, which helps too. Avoid frozen teething rings, as a surface that’s too hard can actually bruise tender gums. A chilled (not frozen) ring is a better option.
Skip the over-the-counter teething gels. The FDA has issued direct warnings against products containing benzocaine or lidocaine for teething pain in infants. Benzocaine can cause a rare but serious condition where the blood’s ability to carry oxygen drops dangerously low. Lidocaine solutions can cause seizures, heart problems, and severe brain injury if too much is absorbed or accidentally swallowed. Homeopathic teething tablets have also drawn FDA warnings. None of these products offer meaningful relief, and the risks far outweigh any potential benefit.
Caring for Those First Teeth
Start brushing as soon as the first tooth appears. Use a baby-sized toothbrush with a tiny smear of fluoride toothpaste, about the size of a grain of rice. Brush at least twice a day, with one of those times being right before bed. The easiest position is to sit your baby on your lap with their head resting against your chest, then brush in small circles covering all surfaces of each tooth.
Let your baby spit out the toothpaste afterward, but don’t rinse with water. Skipping the rinse allows the fluoride to stay on the teeth longer, which is the whole point. Even though these teeth will eventually fall out, keeping them healthy matters. They hold space for permanent teeth and play a role in your child’s ability to chew and learn to speak clearly.