The guidance most parents have heard is "around age three". The current recommendation is considerably earlier: first visit by the first birthday, or within six months of the first tooth appearing, whichever comes first.
Why age one
Early childhood caries can begin as soon as teeth are present, and it moves fast in primary teeth because the enamel is thinner. A first visit at twelve months is mostly about risk assessment and coaching the parent: feeding habits, bottle use at night, fluoride exposure, brushing technique for a wriggling toddler. It also builds familiarity before there is ever a problem to fix, which matters enormously for how a child handles later appointments. Both the American Academy of Pediatric Dentistry and the American Academy of Pediatrics make the same age-one recommendation.
What actually happens
For a one-year-old, often a knee-to-knee exam: the child sits facing the parent, then reclines with their head in the dentist's lap. It takes a few minutes. Expect a look at the teeth and tissues, a fluoride varnish application, and a conversation. No X-rays at this age unless there is a specific reason. Crying is common and not a problem; nobody in a pediatric practice is bothered by it.
Baby tooth eruption
| Tooth | Upper erupts | Lower erupts | Shed |
|---|---|---|---|
| Central incisor | 8 to 12 mo | 6 to 10 mo | 6 to 7 yr |
| Lateral incisor | 9 to 13 mo | 10 to 16 mo | 7 to 8 yr |
| Canine | 16 to 22 mo | 17 to 23 mo | 9 to 12 yr |
| First molar | 13 to 19 mo | 14 to 18 mo | 9 to 11 yr |
| Second molar | 25 to 33 mo | 23 to 31 mo | 10 to 12 yr |
Twenty primary teeth in total, usually complete by age three. The ranges are wide on purpose. A tooth arriving three months either side of the window is normal variation, not a finding. Our eruption timeline tool takes a birth date and shows what should be present now and what is next.
The first permanent molars arrive around age six, behind the baby molars, without anything falling out first. Plenty of parents miss them entirely. They are the most cavity-prone teeth in the mouth and the main target for sealants.
Fluoride, sensibly
Use a smear the size of a grain of rice from the first tooth, moving to a pea-sized amount at age three. Supervise brushing until about age eight, because manual dexterity, not willingness, is the limiting factor. Community water fluoridation remains the background protection for most US children, and the CDC's fluoridation pages cover the current dosing and safety position. If you are on well water, ask the dentist whether a supplement is warranted; it depends on measured fluoride content, so get the water tested rather than guessing.
Things worth mentioning at the appointment
- Bottle or sippy cup with anything but water at bedtime
- Thumb sucking or pacifier use past age three
- Snoring or mouth breathing during sleep
- Grinding at night, which is common and usually harmless in children
- Any family history of early orthodontic treatment
When to see an orthodontist
The standard recommendation is an orthodontic screening by age seven, not because most seven-year-olds need braces, but because that is when the first permanent molars and incisors are in and a developing crossbite, severe crowding, or jaw discrepancy can be spotted while growth can still be used to fix it. Most children screened at seven are simply monitored. Our directory lists pediatric dentists and orthodontists by city.