How Many Teeth Should a Child Have?
Children get two sets of teeth in their lifetime, and the first set — the 20 primary or baby teeth — follows a remarkably predictable schedule. The first tooth typically appears around 6 months, the count hits about 8 by the first birthday (the number the checker above returns for age 1), and the full set of 20 is usually complete by age 3. Then around age 6, the first permanent molars arrive behind the baby teeth — pushing the total to 24 — and the great tooth-losing era begins.
These are averages with wide healthy variation. Some babies are born with a tooth; others do not get their first until 14 months, and both can be perfectly fine. Pediatric dentists worry less about the exact month and more about the pattern: teeth arriving roughly in mirrored pairs, steady progress over time, and no signs of pain, swelling, or discoloration. If your child is far off the typical timeline or you notice anything unusual, your pediatric dentist is the right person to ask — this guide is orientation, not diagnosis.
The Eruption Order, Tooth by Tooth
Baby teeth arrive in a sequence so consistent it has its own nickname among dentists: the 6-4-2 pattern is not quite it, but the real order is nearly as tidy. Here is the typical parade:
- Lower central incisors (6–10 months): the two bottom front teeth, almost always first.
- Upper central incisors (8–12 months): the top front teeth, completing the classic baby smile.
- Upper lateral incisors (9–13 months): the teeth flanking the top front pair.
- Lower lateral incisors (10–16 months): completing the set of eight front teeth — the age-1 milestone.
- First molars (13–19 months): upper and lower chewing teeth, arriving with little fanfare.
- Canines (16–23 months): the pointed eye teeth, filling the gaps between incisors and molars.
- Second molars (23–33 months): the back grinders that complete the set of 20.
Notice the symmetry: teeth erupt in pairs, left and right together, uppers and lowers in sequence. If one side is dramatically ahead of the other for many months, mention it at the next dental visit. The interactive chart above maps all 20 so you can tap each tooth as it arrives.
Surviving Teething
Teething gets blamed for everything from runny noses to bad moods, but the evidence supports a narrower list: drooling, gum discomfort, fussiness, and a mild temperature elevation. High fever, diarrhea, and rashes are not teething — they are illness coincidentally timed with teething, and they deserve their usual response.
What helps: chilled (not frozen) teething rings, gentle gum massage with a clean finger, and for older babies, cold washcloths to chew. What does not help or is unsafe: teething gels with benzocaine (not recommended for young children), amber necklaces (a strangulation and choking hazard), and frozen objects that can bruise delicate gums. Most teething discomfort passes in a few days per tooth — the whole process feels endless because there are 20 of them, not because any single one is severe.
When Baby Teeth Start Falling Out
Around age 6, the roots of the front baby teeth begin to dissolve — resorb is the technical term — as permanent teeth push up from below. The tooth wiggles for days or weeks, then pops out, often at the dinner table or on the playground. Girls tend to lose teeth slightly earlier than boys, and the order roughly mirrors eruption: front teeth first, molars last, with the whole exchange typically complete by 12 or 13.
Let wiggly teeth fall out on their own. Twisting or yanking a tooth that is not ready can break the root tip off in the gum or damage the permanent tooth developing beneath. The classic string-on-the-doorknob is theater — fun theater, but unnecessary. If a baby tooth is very loose and barely hanging on, a clean twist with gauze is fine; if it resists, it is not ready.
One thing to watch: shark teeth, where the permanent tooth erupts behind a baby tooth that refuses to leave. This is common with lower front teeth and usually resolves on its own as the tongue pushes the permanent tooth forward. If the baby tooth is still firmly in place after a few weeks with the adult tooth fully erupted behind it, a dentist can remove it in seconds.
Taking Care of Teeth That Will Fall Out Anyway
Baby teeth are placeholders with a job: they hold space for permanent teeth, guide jaw development, and let children chew and speak properly for a decade. A baby molar lost early to decay lets neighboring teeth drift into the gap, potentially blocking the permanent tooth and creating orthodontic problems that cost thousands to fix later. Baby teeth deserve real dental care.
- Start brushing with the first tooth: a smear of fluoride toothpaste (rice-grain size) under age 3, pea-size after.
- First dental visit by age 1: the standard recommendation — it establishes a dental home before problems start.
- Limit constant sipping: juice and milk pooling around teeth all day is the top cause of early decay; water between meals.
- Floss where teeth touch: once any two teeth touch, usually the molars, they need flossing.
- Do not share spoons: cavity-causing bacteria transfer through saliva — a genuinely underappreciated fact.
The Tooth Fairy: Traditions and Going Rates
The tooth fairy is a relatively modern invention — the character as we know her took shape in mid-20th-century America — but the tradition of marking lost teeth with a gift is ancient, spanning Viking tooth fees to European mice (Ratoncito Pérez still collects teeth in Spain and Latin America). Whatever the mythology in your house, the ritual does real work: it turns a slightly scary bodily event into a celebration.
Going rates vary enormously, which is why the log above includes presets rather than prescriptions. Recent US surveys put the average around $5 per tooth, with first teeth commanding a premium. The practical advice from parents who have run this operation for years: pick a rate you can sustain across 20 teeth, keep it consistent between siblings, and consider making the first and last teeth special rather than inflating every payout. A handwritten fairy note on fancy paper is remembered far longer than an extra dollar.
| Tradition | Where | What happens |
|---|---|---|
| Tooth fairy | US, UK, Australia | Tooth under pillow exchanged for money |
| Ratoncito Pérez | Spain, Latin America | A mouse collects the tooth, leaves a gift |
| Throwing teeth | Parts of Asia, Africa | Lower teeth thrown up, upper teeth thrown down, for straight growth |
| Tooth fee | Viking history | Payment for a child's first tooth — the original fairy payout |
When to Call the Dentist
Most tooth development needs no intervention, but a few situations warrant a call: no teeth at all by 18 months; teeth erupting discolored, misshapen, or in clearly wrong positions; a knocked-out or badly chipped tooth (save the tooth in milk and call immediately); persistent pain or swelling; or baby teeth that have not loosened by the time permanent teeth are well erupted behind them. Early visits are quick and cheap; late ones rarely are.
Track the journey with the tools above — the age checker for expectations, the chart for the satisfying tap-as-they-arrive ritual, and the fairy log for the payouts. Twenty teeth, twenty small celebrations, and a dental foundation that lasts a lifetime.
What to Do With the Teeth Themselves
Most families toss the tooth after the fairy visits, but keepsake options abound if you are sentimental: a small labeled box or a baby book with dated slots turns the collection into a timeline of growing up. Dentists get asked whether lost teeth are useful — a few research programs have collected them for environmental studies, but for most families the tooth's job is done once it is out. One practical tip: rinse the tooth and let it dry before storing, and keep it out of reach of younger siblings, for whom a tiny tooth is a choking hazard. Whatever you keep, photograph the gappy grin — it is the keepsake you will actually look at.
A final note on timing: the ages in the checker are medians, and healthy variation of six months in either direction is completely normal. Premature babies often follow their adjusted age for tooth eruption, and late teethers usually catch up by age three without any intervention. Track the pattern, celebrate each arrival, and let your dentist worry about the calendar.
Making the tradition magical
The going rate matters less than the ritual around it. A tiny note from the fairy, a sprinkle of glitter on the pillow, or a special tooth box turns a wobbly milestone into a core memory. Keep expectations consistent between siblings to avoid midnight negotiations.