Overview: What Parents Need to Know About Baby Teeth
This guide explains when each of the 20 primary teeth typically erupts, what variations are normal, and when a delay should prompt a dental visit. It is written for parents and caregivers of infants and toddlers who want a clear reference for tracking their child's dental development.
Primary teeth, often called baby teeth or milk teeth, start forming before birth. The crowns are already developing inside the gums during the second trimester of pregnancy. Eruption refers to the process of the tooth pushing through the gum and becoming visible in the mouth.
Every child develops on their own schedule. The timeline below reflects typical ranges from the American Academy of Pediatric Dentistry and similar pediatric dental sources.[5] A child who is a few months ahead or behind these averages is usually still within the normal range. Persistent or extreme delays, however, are worth investigating with a specialist.
Baby Tooth Eruption Timeline
Baby teeth typically erupt in a predictable order over the first 2.5 to 3 years of life. Lower teeth usually appear before their upper counterparts, and front teeth come in before molars and canines.
Birth to 12 Months: The First Teeth
Most infants are born without visible teeth, although in rare cases a baby is born with a natal tooth. The first tooth typically appears between 4 and 12 months of age, with 6 months being a common average.[5]
- Lower central incisors (front-bottom): Typically erupt at 6 to 10 months.
- Upper central incisors (front-top): Typically erupt at 8 to 12 months.
- Upper lateral incisors: Often follow at 9 to 13 months.
- Lower lateral incisors: Usually appear at 10 to 16 months.
12 to 24 Months: First Molars and Canines
During the second year, the first molars and canines begin to come in. These teeth tend to cause more discomfort because they are larger and push through more gum tissue than the incisors.
- First molars (upper and lower): Typically erupt at 13 to 19 months.
- Canines (cuspids), upper and lower: Usually appear at 16 to 23 months.
24 to 33 Months: Completing the Primary Set
The second molars are the last primary teeth to come in. Once they erupt, the child has a complete set of 20 primary teeth: 10 on top and 10 on the bottom.[5]
- Lower second molars: Typically erupt at 23 to 31 months.
- Upper second molars: Usually appear at 25 to 33 months.
When Baby Teeth Fall Out
Primary teeth typically begin to loosen and shed around age 6, in roughly the same order they erupted.[6] Lower central incisors are usually the first to fall out, followed by the upper central incisors. The full transition to permanent teeth generally finishes between ages 11 and 13, though third molars (wisdom teeth) emerge much later in the teens or early twenties.
If a permanent tooth comes in behind a baby tooth that has not yet fallen out, sometimes called shark teeth, the baby tooth usually loosens on its own within a few weeks. If it does not, a pediatric dentist can evaluate whether to leave it or remove it.
What to Know About Normal Variation
Variation in baby tooth eruption is common, and most differences in timing are not a cause for concern. Genetics is the single largest factor in when teeth appear. If a parent had early or late teething as a child, the child is likely to follow a similar pattern.
Girls tend to get their teeth slightly earlier than boys, though the difference is typically small.[5] Birth weight, overall health, and nutrition can also influence timing. Babies born preterm often follow eruption timing based on their adjusted age rather than their birth date.
Order can vary too. Some children get their lateral incisors before their upper centrals, or have a canine appear before a first molar. A different sequence is usually not a problem as long as teeth continue to erupt over time.
- Genetics is the strongest predictor of eruption timing.
- Preterm infants often follow adjusted-age timelines.
- Order variation is common and usually not concerning.
- Symmetry matters: Teeth typically erupt in matching pairs (left and right). A wide asymmetry can be worth checking.
What to Expect During Teething
Teething is the process of a tooth pushing through the gum, and it can cause noticeable discomfort for several days before a tooth becomes visible. Common signs include increased drooling, gum tenderness, irritability, mild changes in appetite, and a strong urge to chew on objects.
Common Teething Signs
Symptoms typically appear 3 to 5 days before a tooth erupts and ease once the tooth breaks through. Teething does not cause high fever, diarrhea, or rashes on the body. If a child has these symptoms, an illness unrelated to teething is more likely, and a pediatrician should evaluate them.
- Increased drooling.
- Chewing on fingers, toys, or other objects.
- Swollen, tender gums in the area where a tooth is coming in.
- Mild irritability or disrupted sleep.
- Slightly reduced appetite, especially for warm or hard foods.
Safe Ways to Soothe Teething Discomfort
Many simple, low-risk measures can ease teething pain. The American Academy of Pediatric Dentistry recommends straightforward, non-medicated options first.[5]
- Chilled (not frozen) teething rings made of solid rubber.
- A clean, cold washcloth the baby can chew on.
- Gentle gum massage with a clean finger.
- Cool foods such as chilled applesauce or yogurt for older infants.
- Avoid amber teething necklaces, which carry choking and strangulation risks.
- Avoid benzocaine gels in children under 2 unless directed by a clinician, due to FDA safety warnings.
The First Dental Visit
Both the American Academy of Pediatric Dentistry and the American Dental Association recommend that a child have their first dental visit by age 1, or within 6 months after the first tooth erupts.[5][6] Early visits focus on parent education, cavity risk assessment, and getting the child comfortable with the dental setting. Research has noted that online information for parents about first dental visits varies in quality, which is one reason a face-to-face exam early on is helpful.[2]
Cost Factors for Pediatric Dental Care
Costs for infant and toddler dental visits vary based on geography, the provider, insurance coverage, and the child's specific needs. A first dental visit is typically an exam and parent counseling rather than a treatment, so costs are usually modest compared to procedures performed later.
Most dental insurance plans cover preventive visits for children at little or no out-of-pocket cost. Medicaid covers dental care for children in every state in the United States as part of the Early and Periodic Screening, Diagnostic, and Treatment benefit. Costs vary by location, provider, and case complexity, so it is worth confirming coverage and fees with the office before the visit.
- Routine exam and counseling visit: Often fully covered by dental insurance or Medicaid for children.
- Fluoride varnish application: Commonly covered as a preventive service.
- Sedation or specialized care: May incur additional fees and require pre-authorization.
- Costs vary by location, provider, and case complexity.
When to See a Pediatric Dentist
Schedule a pediatric dental visit if no teeth have erupted by 12 to 15 months, if teeth are erupting in an unusual position, or if a child shows signs of decay on existing teeth. A pediatric dentist has additional training in infant and toddler oral development and can evaluate concerns that a general dentist may refer out.
Delayed or Ectopic Eruption
Significantly delayed eruption can sometimes be linked to nutritional deficiencies, low birth weight, or genetic conditions. Certain syndromes, such as Hallermann-Streiff syndrome, are associated with abnormal dental development, including delayed or absent teeth.[3] Severe early periodontal disease in baby teeth has also been described in rare conditions such as Papillon-Lefèvre syndrome, where early specialist evaluation is important.[4]
Ectopic eruption, where a tooth comes in out of position, is another reason for early evaluation. Research has documented ectopic eruption of permanent first molars and the dentoskeletal features that often accompany it, which is one reason a specialist may want imaging before primary teeth shed.[1]
Red Flags Worth a Specialist Visit
Most teething concerns resolve on their own, but certain signs warrant a pediatric dental evaluation.
- No teeth by 12 to 15 months.
- Teeth erupting in an unusual position or order with visible crowding.
- White or brown spots on baby teeth, which can signal early decay.
- Discolored, fractured, or loose teeth from a fall or injury.
- Persistent swelling, abscess, or bleeding gums.
- A family history of genetic conditions affecting tooth development.
Find a Pediatric Dentist
If you are tracking your child's teething and want a specialist's perspective, browse the pediatric-dentistry page to find pediatric dentists in your area. A board-certified pediatric dentist can evaluate eruption timing, screen for early decay, and answer questions about your child's specific developmental pattern.
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