Part of the HiGoodHealth oral health series. Our Complete Oral Hygiene Guide for Every Age covers the whole family; this article is about the years when a child is losing baby teeth.
At a glance
- Most children start losing milk teeth at around six, and finish somewhere between eleven and thirteen. The lower front teeth usually go first. Children have 20 primary teeth, and they are shed a few at a time over six or seven years, not all at once.
- A milk tooth does not get pushed out. Its root dissolves from underneath. As the permanent tooth develops beneath it, the baby root is gradually resorbed until too little is left to hold the tooth in place, which is why a genuinely ready tooth comes out with almost no fuss.
- Timing varies more than parents expect, and the age chart is a range rather than a deadline. What is worth watching is the sequence and the symmetry: whether teeth are going in roughly the usual order, and whether one side is keeping pace with the other.
- One thing alarms parents more than it should: shark teeth in kids. That is a permanent tooth coming through behind a baby tooth that has not fallen out yet, briefly giving a child two rows. In the lower front, at this age, it usually sorts itself out on its own.
- The exception is a tooth lost early to decay or a knock. That tooth had not finished the process, and the gap it leaves can start closing before the adult tooth is ready. That is the one situation where a dentist should look sooner rather than later.
What are milk teeth?
Milk teeth are the first set of teeth, also called baby teeth, primary teeth, or deciduous teeth. Children normally have 20: ten upper and ten lower, and the first usually appears at around six months.
They are not placeholders in a trivial sense. They are used for chewing and speech; they shape jaw development, and they hold the space each permanent tooth will eventually need.
Why do milk teeth fall out?
As the permanent successor develops and moves upward, the root of the primary tooth above it undergoes resorption; it is gradually broken down and absorbed. The crown loosens, comes away, and the permanent tooth erupts into the space.
The clinical name for the process is exfoliation of the primary dentition. It explains the two things parents most often ask about: why a ready tooth comes out easily, and why forcing one that is not ready hurts.
When do milk teeth start falling out?
Most children begin at around six to seven years. There is no exact age for any individual tooth, and pediatric dentistry guidance gives approximate ranges precisely because many healthy children do not follow the schedule closely.
The age chart
| Primary tooth | Upper jaw | Lower jaw |
|---|---|---|
| Central incisor | 7–8 years | 6–7 years |
| Lateral incisor | 8–9 years | 7–8 years |
| Canine | 11–12 years | 9–11 years |
| First molar | 9–11 years | 10–12 years |
| Second molar | 9–12 years | 11–13 years |
These are approximate ranges, not strict deadlines.
Chart: the twenty baby teeth — ten in the upper jaw and ten in the lower, colour-coded by type. The age at which each one is shed is in the table above.
Which milk tooth falls out first?
Usually the lower central incisors, at around six to seven. After that, roughly: upper central incisors at seven to eight, lateral incisors at seven to nine, then the first molars, canines and second molars between nine and thirteen.
The order varies, particularly between the upper and lower jaws, and a child who does one pair out of sequence is usually not doing anything unusual.
A year-by-year picture
Around 6–7 years
The lower front baby teeth commonly loosen and come out. The first permanent molars also arrive around now, and they catch parents out: they erupt behind the primary molars and do not replace a baby tooth, so nothing falls out to announce them.
Because nothing falls out, the discomfort gets blamed on something else. Sore gums at the very back, a child chewing on things again, one-sided jaw ache, and broken sleep at around six are often just a molar coming through.
A fever is not. The American Academy of Pediatrics states plainly that teething does not cause fever, and warns that blaming teeth for one delays care for real infections. A child with a temperature needs assessing for the temperature, whatever their teeth are doing. These first permanent molars are covered in the FAQs below.
Around 7–9 years
The upper and lower front teeth are progressively replaced. Expect loose teeth, small gaps, permanent teeth that look large against a child’s face, and a smile that changes month to month.
Around 9–12 years
Primary molars and canines exfoliate, and their permanent successors move into position.
Around 11–13 years
The second primary molars are among the last to go. By the early teens, most children have largely transitioned to permanent teeth.
What happens when a tooth becomes loose
It moves slightly, becomes steadily more mobile, gets wiggled by a tongue or a finger, and eventually comes away, after which the permanent tooth begins to appear.
A naturally loose tooth does not need forceful removal. Let it go on its own. What warrants a call is significant pain, swelling, pus, bleeding that will not settle, or a permanent tooth erupting while the baby tooth is still firmly in place.
Shark teeth in kids: do they fix themselves?
Sometimes a permanent tooth starts coming through behind a baby tooth that has not fallen out yet, briefly giving a child two rows of teeth. Parents call this shark teeth, and it happens most often with the lower front teeth.
Most of the time, yes, they fix themselves. The baby tooth in front is usually already loosening, and once it comes out, the permanent tooth drifts forward into the space over the following weeks. The tongue does a surprising amount of that work without anyone helping it.
What decides whether to wait or call is the baby tooth in front, not the second row itself. If it is wobbly, waiting is reasonable.
If it is still firm after several weeks, if the new tooth is coming in noticeably out of position, or if only one side is doing this while the other is well behind, a dentist should look.
Shark teeth in kids are common in the lower front around six to eight, and much less usual elsewhere in the mouth; a second row further back is worth an earlier appointment.
When a milk tooth is lost too early
Early loss usually has a cause: severe decay, infection, a knock, or a permanent tooth erupting in the wrong place. Severe untreated decay is the most common of these, and it is preventable; see our guide to bottle rot and early childhood caries.
The problem is not the gap itself but what happens to it. Neighboring teeth can drift into the space, leaving less room than the permanent successor needs. That can lead to crowding, rotation, or a tooth erupting off its intended path.
This is what a space maintainer is for. It is a small appliance that holds the gap open until the permanent tooth is ready. Whether one is needed depends on which tooth was lost, how old the child is, and how far the permanent successor has developed — a judgement for the dentist, not a default.
When a baby tooth has not fallen out
A retained primary tooth is not automatically a problem, and plenty of children simply run late.
A dental examination is sensible if a permanent tooth has erupted while the baby tooth remains firmly in place, if eruption is markedly asymmetric or delayed, if there is pain or swelling, or if a tooth appears to be coming through in an abnormal position.
Does it hurt?
Natural exfoliation usually causes little discomfort, some gum tenderness, and a small amount of bleeding at most.
Significant pain before a tooth is loose is a different signal. That points to decay, infection, trauma, or abnormal eruption rather than the normal process, and it is worth having looked at.
What to do when a tooth comes out
Do: reassure the child, keep the area clean, carry on brushing normally, use clean gauze with gentle pressure for minor bleeding, and keep regular dental visits.
Avoid: pulling teeth that are not ready, ignoring pain or swelling, stopping brushing around a tender area, and assuming that early tooth loss is harmless.
Looking after teeth during the mixed dentition
The period when a child has both baby and permanent teeth is called the mixed dentition, and it is the point at which brushing quality matters most because the teeth arriving now are the ones they keep.
Brush twice daily with fluoride toothpaste and keep supervising: most children cannot clean every surface reliably until around seven or eight. Our guide to brushing technique covers the mechanics.
Pay particular attention to the newly erupted permanent molars. They sit right at the back; they have deep grooves, and they are the teeth most often missed. Once teeth are touching, clean between them; see our step-by-step flossing guide. Keep sugary food and drink to mealtimes, and keep up regular dental examinations.
When to see a dentist
Do not wait until all the milk teeth have gone. Regular visits through these years let a dentist watch eruption, exfoliation, decay, oral hygiene, crowding, space loss and the developing bite while there is still time to influence any of it.
Warning signs worth an appointment: a tooth lost much earlier than expected · severe pain · swelling or pus · a permanent tooth erupting while the baby tooth is still firm · a tooth retained unusually long · a marked difference between the two sides · a tooth lost after a significant knock · difficulty eating because of dental pain.
Key takeaways
Most children start losing milk teeth around six and finish in the early teens, beginning with the lower front teeth. All 20 primary teeth do not go at once — they are shed a few at a time across six or seven years, and small variations in timing are usually normal.
Shark teeth in kids — a second row coming through behind a baby tooth — usually fix themselves once the tooth in front comes out. What decides whether to wait is the baby tooth: wobbly means wait; still firm after several weeks means see a dentist.
The chart is a range, not a schedule. What is worth watching is the sequence and the symmetry rather than any individual birthday. A naturally loose tooth needs no help; a tooth that is not ready should not be pulled.
Loss caused by decay or trauma is a different thing from normal exfoliation. The space a baby tooth was holding can close before the permanent tooth is ready, which is why early loss deserves a dental assessment and sometimes a space maintainer.
Retained baby teeth and permanent teeth erupting out of position are also worth a look, and the newly erupted permanent molars need the best brushing of a child’s life so far.
Frequently asked questions
At what age do milk teeth fall out?
Most children begin at around six to seven years, with the last primary teeth shed at roughly eleven to thirteen. Individual timing varies, and standard charts are approximate.
Which baby tooth falls out first, and is my child late?
Usually a lower central incisor, at around six to seven. Some variation either way is normal. What is worth checking is the sequence and whether both sides are keeping pace, rather than the exact age.
Do shark teeth in kids fix themselves?
Usually, yes. Once the baby tooth in front comes out, the permanent tooth behind it generally moves forward into the space over the following weeks. Ask a dentist if the baby tooth is still firm after several weeks, or if the new tooth is noticeably out of position.
What causes shark teeth, and is it my child’s fault?
Neither. The permanent tooth erupted slightly behind its predecessor rather than directly underneath, so the baby root did not resorb as it usually would. Nothing a parent did or did not do causes it. It is most common in the lower front teeth at around six to eight.
Should I pull my child’s loose tooth?
A naturally loose tooth does not need forceful removal and is best left to come out on its own. A tooth that is not ready still has root attached, so pulling it early means pain and bleeding.
What if a baby tooth falls out too early?
Early loss usually has a cause: decay, infection, or a knock, and the gap can start closing before the permanent tooth is ready. A dentist can assess whether the space needs to be held open with a space maintainer.
What are six-year molars?
The first permanent molars, erupting at around six behind the primary molars. Nothing falls out to announce them, so they are easily missed, and they are often the first permanent teeth to decay. Sore gums and chewing at that age are commonly a molar arriving; a fever is not.
When should I worry about delayed eruption?
A dentist should assess significant asymmetry between the two sides, a primary tooth retained unusually long, an abnormal eruption position, or a permanent tooth that seems to be missing.
Glossary
- Primary teeth: the first set of 20 teeth, also called milk, baby, or deciduous teeth.
- Exfoliation: the natural shedding of a primary tooth once its root has resorbed.
- Resorption: the gradual breaking down and absorption of a baby tooth’s root as the permanent tooth develops beneath it.
- Mixed dentition: the stage when a child has both primary and permanent teeth, roughly six to twelve.
- Shark teeth: the everyday name parents give a permanent tooth erupting behind a baby tooth that has not yet been shed, briefly creating two rows. Most common in the lower front teeth.
- Space maintainer: a small dental appliance that holds a gap open when a primary tooth is lost early, so the permanent successor has room.
- Six-year molars: the first permanent molars, which erupt at around six behind the primary molars without replacing a baby tooth. Because nothing falls out, parents often do not realize they are coming.
References
All reference links checked on 11 September 2026.
- American Academy of Pediatric Dentistry — Dental Growth and Development, The Reference Manual of Pediatric Dentistry: https://www.aapd.org/globalassets/media/policies_guidelines/r_dentalgrowth.pdf
- American Academy of Pediatric Dentistry — Management of the Developing Dentition and Occlusion in Pediatric Dentistry: https://www.aapd.org/research/oral-health-policies–recommendations/management-of-the-developing-dentition-and-occlusion-in-pediatric-dentistry/
- American Academy of Pediatric Dentistry — Periodicity of Examination, Preventive Dental Services, Anticipatory Guidance and Oral Treatment for Infants, Children and Adolescents: https://www.aapd.org/research/oral-health-policies–recommendations/periodicity-of-examination-preventive-dental-services-anticipatory-guidance-counseling-and-oral-treatment-for-infants-children-and-adolescents/
- American Dental Association — Baby Teeth Eruption Charts, MouthHealthy: https://www.mouthhealthy.org/all-topics-a-z/eruption-charts/
- American Dental Association — Baby Teeth, MouthHealthy: https://www.mouthhealthy.org/all-topics-a-z/baby-teeth/
- American Academy of Pediatrics — Teething symptoms, HealthyChildren.org (teething does not cause fever): https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Teething
- Logan WHG, Kronfeld R. Development of the human jaws and surrounding structures from birth to the age of fifteen years. J Am Dent Assoc. 1933;20(3):379–427.
Disclaimer
This article is for general education and is not medical or dental advice. Eruption and exfoliation ages vary between children, and the ranges given are approximate. Speak to a dentist about your own child, and seek prompt care for significant pain, swelling, pus, or a tooth lost after a knock.
