Tooth Eruption Delay In Infants: What Parents Need To Know In 2026

Written By: Logan Grover, Health Content Writer

Reviewed By: Dr. Alison Grover, Board-Certified Diplomate Pediatric Dentist

Last Reviewed: May 19, 2026

Most babies cut their first tooth between 6 and 10 months. But if your child hits their first birthday with bare gums, you're probably wondering whether something's wrong. Tooth eruption delay in infants is more common than most parents realize, affecting roughly 9.1% of babies according to a 2025 cohort study published in PubMed. And in the majority of cases, it's a normal variation, not a medical problem.

That doesn't mean you should ignore it. The line between "late bloomer" and "needs evaluation" sits around 18 months. If no teeth have appeared by then, a pediatric dentist should take a look. But before you spiral through parenting forums at 2 a.m., here's what the evidence actually says.

What Is Tooth Eruption Delay in Infants?

Tooth eruption delay in infants means a baby's primary teeth appear later than the typical timeline. The average first tooth (usually a lower central incisor) shows up between 5 and 8 months, with the full set of 20 baby teeth arriving by age 2.5 to 3 years. A delay becomes clinically relevant when no teeth have appeared by 12 to 18 months, or when eruption patterns are significantly asymmetric.

Most pediatric dental guidelines, including those from the American Academy of Pediatric Dentistry, treat 18 months with zero teeth as the threshold for a specialist referral. Before that point, variation is expected and common.

Common Causes of Delayed Teething in Babies

Genetics top the list. If you or your partner didn't get teeth until after your first birthday, your baby will likely follow the same pattern. Ask your parents. Seriously. This one question answers the concern for a large number of families we see at our infant dental visits.

Premature birth is the second biggest factor. One study found that 60% of premature infants didn't cut their first tooth until after 40 weeks chronological age. Low birth weight compounds the effect. These babies aren't behind; their bodies are working on a corrected timeline.

Nutritional gaps play a role too, especially low vitamin D and calcium. If your baby isn't getting enough through breast milk, formula, or (later) solid foods, tooth and bone development slows down. Hypothyroidism and rarer conditions like cleidocranial dysplasia can also interfere, but these affect a very small percentage of kids.

One thing I want to push back on: the idea that delayed teething signals lower intelligence. I've seen this myth circulate on every parenting forum imaginable. There is zero clinical evidence linking eruption timing to cognitive development. None.

When Should You Talk to a Pediatric Dentist?

The AAPD recommends every child see a dentist by age 1 or when the first tooth appears, whichever comes first. If your baby has no teeth at 12 months, that first visit becomes even more important.

Here's the practical timeline:

1. 6-12 months with no teeth: Monitor. This falls within normal range.

2. 12-18 months with no teeth: Schedule an evaluation. A pediatric dentist can take X-rays and check for underlying teeth beneath the gumline.

3. 18+ months with no teeth: Specialist referral recommended. The dentist will look for congenital absence of teeth, impacted buds, or systemic conditions.

The goal of early evaluation isn't to rush anything. It's to catch the small percentage of cases where something like early dental issues or structural problems need attention before they affect chewing, speech, or alignment down the road.

Inside the Pediatric Dental Evaluation

A pediatric dentist evaluating delayed eruption will start with a visual exam and family history. If no teeth are visible and the child is past 12 months, they'll typically order a panoramic X-ray. This shows whether tooth buds are present beneath the gums, whether they're positioned correctly, and whether the jaw bone structure looks normal.

In most cases, the X-ray reveals teeth that are simply taking their time. The dentist sends you home with a "check back in three months" plan. That's the boring, reassuring outcome, and it happens far more often than the dramatic scenarios parents imagine.

When something does show up (missing tooth buds, ectopic positioning, signs of impaction) the dentist coordinates with your pediatrician. Conditions like hypothyroidism are treatable, and catching them through a dental evaluation is actually one of the less-discussed benefits of bringing your baby to a pediatric dentist early.

Does Late Teething Affect Permanent Teeth?

Short answer: usually not. Baby teeth and permanent teeth develop on separate timelines. A child who cuts their first tooth at 14 months might lose their first baby tooth at 7 instead of 6, but the permanent teeth underneath aren't damaged or delayed in a meaningful way.

Actually, some pediatric dentists (myself included) consider late baby teeth a minor advantage. Teeth that arrive later spend less time exposed to sugar, bacteria, and the risk of trauma during toddler tumbles. A 2025 AAPD best practice document on developing dentition management emphasizes that eruption variability alone doesn't predict orthodontic problems.

The exception: if delayed eruption leads to crowding when permanent teeth start coming in around age 6, early Phase 1 orthodontic treatment might be needed. That runs $1,500-$3,500 on average. But that's a "bridge we cross when we get there" situation, not something to lose sleep over with a 10-month-old.

Nutritional Support for Healthy Tooth Eruption

You can't force teeth through the gums faster. But you can make sure your baby's body has what it needs to follow its natural schedule.

• Vitamin D drives calcium absorption and directly supports tooth mineralization. The first three years are the window where enamel mineralization happens, according to research from UF Health's pediatric dental resources.

• Calcium builds the hard tissue. Milk, yogurt, cheese, and beans are the go-to sources once solid foods start. Phosphorus and magnesium support dental tissue formation alongside calcium.

If you suspect a deficiency, talk to your pediatrician before supplementing. A blood test for vitamin D levels gives you a real answer instead of a guess.

Why Teething Charts Aren't Deadlines

Teething charts show averages. The word "average" means roughly half of all babies fall on either side of that number. The mean age for first tooth eruption in a 2025 cohort was 6.9 months, with a standard deviation of 2.6 months. That's a normal range stretching from about 4 months to nearly 10 months, and outliers beyond that aren't automatically concerning.

I've worked with parents who brought printed teething charts to appointments with specific dates circled in red marker. That level of tracking creates more anxiety than it solves. If your baby is gaining weight, hitting motor milestones, and otherwise developing normally, the teeth will come. Watching for signs of actual dental problems matters far more than matching a chart.

One practical exception: if your baby is also delayed in sitting, crawling, or babbling, mention the teething delay to your pediatrician. When multiple developmental milestones lag together, it's worth a broader evaluation. But teething delay by itself, in an otherwise thriving kid, rarely means anything.

Dealing With the Anxiety of Late Teeth

Social media makes this worse. You see a friend's baby grinning with six teeth at 8 months while yours is still gumming everything in sight at 13 months. The comparison trap is real, and it hits harder than most parents admit.

Here's what helps: ask your own parents when you got your first tooth. Genetics explain the majority of variation, and hearing "oh, you didn't get teeth until you were 14 months old" tends to settle nerves faster than any article can.

If you're still worried, schedule the visit. A five-minute conversation with a pediatric dentist who understands your family's dental history beats a hundred Google searches. At Mini Miners, tooth eruption concerns are one of the most common reasons parents bring babies in. You won't be the first.

Tooth eruption delay in infants resolves on its own in the vast majority of cases. Focus on the 18-month threshold, keep up with nutrition, and get that first dental visit on the calendar. The teeth will show up.

FAQs

Is it normal for a baby to have no teeth at 12 months? 

Yes. While the average first tooth appears around 6-7 months, many healthy babies don't cut teeth until 12-14 months. Genetics and prematurity are the two most common reasons. The clinical threshold for concern is 18 months with no teeth, at which point a pediatric dentist should evaluate.

Does delayed teething mean my baby has a developmental problem? 

In most cases, no. Tooth eruption delay in infants is a standalone variation roughly 91% of the time. If your child is also delayed in sitting, crawling, or speech, mention the teething delay to your pediatrician for a broader assessment. Late teeth by themselves don't indicate cognitive or physical delays.

What causes tooth eruption delay in infants? 

The most common cause is genetics. Family history of late teething is the strongest predictor. Premature birth, low birth weight, vitamin D deficiency, and low calcium intake are other documented factors. Rare systemic conditions like hypothyroidism account for a small percentage of cases. A 2025 cohort study found roughly 9.1% of infants experienced clinically delayed eruption.

Can I make my baby's teeth come in faster? 

No intervention speeds up eruption. But proper nutrition (adequate vitamin D, calcium, and phosphorus) supports normal development. Gum massage with a clean finger can soothe discomfort but won't accelerate the process. Focus on overall nutrition rather than searching for shortcuts.

Will late baby teeth cause problems with permanent teeth? 

Usually not. Baby teeth and permanent teeth form on separate timelines. Late primary teeth may mean slightly later loss of baby teeth, but permanent tooth health and alignment aren't typically affected. Early orthodontic evaluation (Phase 1) runs $1,500-$3,500 if crowding develops later, but most late teethers don't need it.

Are dental X-rays safe for babies with delayed teething? 

Yes. Modern pediatric dental X-rays use very low radiation doses. The AAPD supports diagnostic imaging when clinically indicated, such as evaluating a baby past 12-18 months with no visible teeth. The benefit of identifying issues like impacted teeth or missing tooth buds outweighs the minimal exposure.

When should I schedule my baby's first dental visit if no teeth have appeared? 

The AAPD recommends a first dental visit by age 1 regardless of whether teeth have erupted. If no teeth are present at 12 months, that visit serves as both a wellness check and an opportunity to evaluate eruption patterns. Don't wait for teeth to appear before booking.