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Growth and development

Every growing smile has a story. We’re here to guide it.

From the first baby tooth to the arrival of permanent teeth, every child's smile develops at its own pace. Crooked teeth, delayed eruption, crowding, and unusual tooth patterns can leave parents wondering what's normal.

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Is your child’s smile growing the way it should? From delayed teeth to crowding and bite concerns, our pediatric specialists are here to provide answers, reassurance, and expert guidance.

Spotting concerns before they become problemsOur pediatric dentists monitor your child’s teeth and jaw development to identify potential concerns early and guide healthy growth

Every smile grows at its own paceEarly or late, every child’s teeth develop differently. We’re here to help you understand what’s normal

At Children’s Dental Health Centre, our pediatric dentists specialize in monitoring how children’s teeth and jaws grow. We help you understand what’s part of normal development, identify concerns early, and recommend treatment only when it’s truly needed.

Peace of mind for parents. Healthy smiles for growing children.

The short answer

Timing varies far more than parents expect

Baby teeth usually arrive between six and ten months, starting with the lower front two, and all twenty are typically in by age three. Children begin losing them around age six, and the permanent teeth continue arriving until roughly age thirteen. Several months of variation in either direction is normal.

What matters more than the exact month is the pattern. Teeth generally arrive in matching pairs and in a predictable order, and a child who is simply running early or late across the board is usually just running early or late. It tends to run in families.

The things worth acting on are different in kind, not degree, and there are only a handful of them.

Baby with first teeth
Child with a gap in their smile
20 baby teeth
32 adult teeth

The timeline

When teeth arrive, and when they leave

These are ranges, not deadlines. A child sitting outside one of them is usually still fine, but it is a reasonable moment to ask.

Baby teeth coming in

Twenty teeth, birth to about age three

  1. 6 to 10 months Lower front two Almost always the first to arrive.
  2. 8 to 12 months Upper front two The ones in every photograph.
  3. 9 to 16 months The four either side Upper usually before lower.
  4. 13 to 19 months First molars The first back teeth, used for chewing.
  5. 16 to 22 months Canines The pointed ones. Often the sorest.
  6. 23 to 33 months Second molars The last to come in. All twenty by about age three.

Adult teeth coming in

Thirty-two teeth, about age six onwards

  1. Around 6 First molars These arrive behind the baby teeth, so nothing falls out. Most parents never notice them. They are permanent and they are the teeth most worth sealing.
  2. 6 to 8 Front teeth Lower first, then upper. They look enormous at first because they are adult-sized in a child-sized face. That evens out.
  3. 9 to 12 Premolars and canines Replacing the baby molars and canines. This is the stage where crowding usually becomes visible.
  4. 11 to 13 Second molars Further back again. Also worth sealing.
  5. 17 to 21 Wisdom teeth If they come at all. We watch for them on x-rays well before then.

The one most parents miss

The six-year molars arrive without anything falling out

At around age six, four permanent molars come in at the very back of the mouth, behind the last baby teeth. Because no tooth falls out to make room for them, there is no wobble, no tooth under the pillow, and no moment where anyone notices they have appeared.

So they get treated like baby teeth for years, by children and parents alike. They are not. They are permanent, they have to last a lifetime, and they are the teeth most likely to decay, because the grooves across their chewing surface are narrower than a toothbrush bristle can reach into.

This is the single best moment in childhood to put sealants on. It takes minutes, involves no drilling and no freezing, and it protects the teeth at exactly the point they are most vulnerable.

Child around age six, open smile

Worth a call

When late is worth a closer look

None of these are emergencies except the knocked-out tooth. They are the ones where looking sooner leaves your child with more options than looking later.

No teeth at all by 18 months

Late teething is usually just late, and it often runs in families. By eighteen months, though, bring them in instead of waiting it out.

A tooth knocked out or pushed in

A permanent tooth knocked out is a same-day emergency. A baby tooth is different and usually should not be put back. Call either way and we will tell you which.

An adult tooth coming in behind a baby tooth

Usually the lower front. It looks alarming and it is usually fine. Most sort themselves out, but have it checked instead of assumed.

Nothing lost by age seven and a half

Most children lose their first tooth around six. Well past seven with nothing loose is worth an x-ray to see what is underneath.

A white, brown or grey mark on a tooth

A chalky white patch can be early decay, which is reversible at that stage. A dark one usually is not. Both are worth catching early.

A tooth that looks a different shape or colour

Enamel does not always form evenly. Teeth that come in pitted, yellow or unusually shaped need a different care plan, not just more brushing.

A permanent tooth that has been knocked out is a same-day emergency and the first hour matters. What to do right now.

Interceptive orthodontics

Phase One, Phase Two, and why some children need both

Guiding how a bite develops is a different job from straightening teeth, and the two can happen years apart. Here is what each one actually is, so you can tell which one is being suggested for your child.

Phase One

Guiding growth, while the jaw is still growing

An early, limited course of treatment while your child still has a mix of baby and adult teeth. It is not about straightening teeth. It is about making room, correcting a crossbite or a severe overbite, or steering a tooth that is coming in the wrong direction, at the age when the jaw will still respond. Usually a small appliance or a short course of partial braces, and usually far shorter than full treatment.

Phase Two

Aligning the teeth, once they are all in

The familiar full course, once all the adult teeth have arrived. Its job is alignment and the final bite. A child who has had Phase One may still need it, and that is not a sign the first phase failed: the two do different jobs. Many children never need an early phase at all and go straight to this one.

Neither, for now

Watching is a real plan

The most common outcome of an early assessment is that nothing needs doing yet, and we tell you that plainly. Watching how the jaw and the adult teeth develop is a decision, not a delay. We will say what we are watching for and when we want to look again.

No early phase gets started here if it would not change the outcome. More about early orthodontics.

What is normal at six is not normal at twelve

We track how your child’s teeth and jaw are developing at every visit, so changes are caught while they are still easy to handle.

Watch

A minute on cheek biting

Is cheek biting normal?

Why children do it, and when it is worth mentioning at an appointment.

Questions

What parents ask about teething and losing teeth

When do babies start teething?

Usually between six and ten months, starting with the two lower front teeth, though anywhere in that range is normal and some babies start earlier or later. All twenty baby teeth are typically in by around age three. Teething can cause sore gums, drooling, irritability and disturbed sleep. It does not cause a high fever, diarrhoea or a rash, and if your baby has those, something else is going on and they should be seen by a doctor.

What order do baby teeth come in?

Lower front two first, then the upper front two, then the four teeth either side of those, then the first molars at the back, then the canines, then the second molars last. The pattern is usually symmetrical, so teeth tend to arrive in matching pairs. Order matters more than exact timing: a tooth arriving a few months early or late is rarely a concern, but teeth arriving in an unusual sequence is worth mentioning at a visit.

When do children start losing their baby teeth?

Around age six, usually the lower front two, and in roughly the order they arrived. The process runs until about age twelve. Children who got their first teeth early tend to lose them early. If your child is well past seven and nothing has loosened, it is worth an x-ray to see whether the adult teeth are there and where they are.

My child has an adult tooth growing behind a baby tooth. Is that a problem?

Usually not. It is common enough to have a nickname, shark teeth, and it nearly always involves the lower front two. The adult tooth surfaces behind because the root of the baby tooth in front has not dissolved away yet. In most cases that baby tooth works loose within a few weeks and the one behind drifts forward on its own. Bring it in rather than assuming, because now and then the baby tooth needs a hand out of the way.

Why do my child’s new front teeth look so big or have gaps?

This is often a completely normal part of growing up. Permanent front teeth are naturally larger and wider than the baby teeth they replace. Because your child’s face and jaws are still developing, these new teeth may initially look oversized or out of proportion.

Children also go through a normal developmental phase known as the “Ugly Duckling Stage”, typically between ages 7 and 12. During this time, the upper front teeth may appear spaced apart, tilted, or slightly crooked as the permanent canines develop and erupt. As these teeth settle into position, many of these gaps and irregularities naturally improve without orthodontic treatment.

You may also notice small bumps along the edges of newly erupted adult teeth, called mamelons. These are normal and often wear down naturally over time.

Many of these changes are simply part of your child’s growing smile. Our pediatric dentists monitor dental development at regular checkups to help distinguish normal growth from concerns that may benefit from early orthodontic guidance.

What are six-year molars and why do they matter?

They are the first permanent molars, and they arrive around age six at the very back, behind the baby teeth. Because no tooth falls out to make room, most parents never realise they have appeared and assume they are still baby teeth. They are not, and they have to last a lifetime. They are also the teeth most likely to develop cavities, because the deep grooves on their chewing surface are narrower than a toothbrush bristle. This is the single best moment to seal a tooth.

Is spacing between my child’s baby teeth something to worry about?

Usually the opposite. Gaps between baby teeth are a good sign, because they mean there is likely to be room for the much larger adult teeth arriving behind them. It is crowded baby teeth, not spaced ones, that more often point to a shortage of room later. Either way we measure it rather than guess, and tell you what we see.

Should I pull a loose tooth out?

Let your child wiggle it themselves and it will come out when it is ready, usually with very little blood and no drama. Pulling a tooth that is not ready hurts and can leave part of the root behind. If a tooth has been hanging on for weeks, is sore, or is stopping your child eating, we can take it out properly.

If your question is about how the bite and jaw are developing, not when teeth arrive, it is answered on early orthodontics.

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