Medically reviewed by Dr. Dharmanshu Boghara, Heritage Pointe Dental
The most common dental problems in children are cavities (tooth decay), issues linked to thumb sucking or pacifier use, teeth grinding, early gum inflammation, bite alignment problems, and dental injuries from falls or sports. Most of these are preventable with consistent home habits and regular checkups, and several tend to resolve on their own as a child grows.
At a Glance
- Cavities — the most common issue, largely preventable with brushing, diet, and checkups
- Thumb sucking/pacifier habits — usually normal, worth a look if intense and ongoing past age three or four
- Teeth grinding (bruxism) — common, usually outgrown, rarely serious
- Gum inflammation — from plaque buildup, manageable with better home care
- Bite/alignment issues — worth monitoring early, not usually urgent
- Dental injuries — the one category where quick action genuinely matters
None of this is meant to diagnose your child. If something specific is worrying you, a dental exam is the most reliable way to get a clear answer.
Why Kids’ Teeth Need Extra Attention
Children’s teeth are still developing, and baby teeth play a bigger role than most parents expect. They hold space for permanent teeth and guide them into position as they erupt. They also tend to be more vulnerable to decay than adult teeth, partly because young enamel is thinner and partly because good brushing habits take time to build.
That combination — developing teeth, developing habits — is why certain dental problems show up so consistently in childhood. Here’s what to watch for.
Cavities and Tooth Decay
Tooth decay is the dental problem parents encounter most often, and it’s also the most studied. The Canadian Dental Association describes early childhood caries as a common and largely preventable condition, and it happens the same way in every child: sugars from food and drinks interact with bacteria in the mouth, producing acid that wears down enamel over time.
Why it happens: Frequent snacking, sugary drinks, and inconsistent brushing all increase the risk, since teeth get less recovery time between acid exposures.
Signs to watch for: White or brown spots on a tooth, visible pits or holes, or your child avoiding chewing on one side of their mouth.
A related pattern worth knowing: baby bottle tooth decay happens when sugary liquids — including milk, formula, or juice — sit on a child’s teeth for long stretches, often from falling asleep with a bottle or sippy cup. Switching to water for naps and bedtime removes most of that risk.
Prevention: Brushing twice a day with fluoride toothpaste, limiting sugary snacks and drinks between meals, and keeping up with routine children’s dental checkups, which catch early decay before it needs more involved treatment.
When to have it checked: Any visible spot, discoloration, or complaint of tooth pain is worth a dental visit rather than a wait-and-see approach.
Thumb Sucking and Pacifier Habits
Sucking is a natural reflex, and most toddlers use a thumb, finger, or pacifier for comfort at some point. On its own, this usually isn’t something to worry about.
Why it happens: It’s soothing and often helps young children settle down or fall asleep — it’s a normal part of early development, not a behavioural problem.
Signs it may be affecting teeth: The habit becomes more relevant once permanent teeth start coming in, particularly if your child sucks intensely rather than just resting a thumb passively in their mouth. Persistent, vigorous sucking can gradually push teeth out of alignment.
Prevention and timing: Most children stop on their own between ages two and four. The American Academy of Pediatric Dentistry generally recommends a dental conversation if the habit is still frequent and intense by around age three, or sooner if you notice teeth shifting. Gentle encouragement — praising your child for stretches without the habit, rather than scolding them for it — tends to work better than pressure.
When to have it checked: If the habit continues past age four, or if you notice your child’s front teeth aren’t meeting normally.
Teeth Grinding (Bruxism)
Many parents are surprised to learn how common this is. A lot of kids grind or clench their teeth at night without being aware of it at all.
Why it happens: It can be related to how a child’s bite is developing, jaw growth, or general nighttime restlessness. It’s rarely a sign of anything serious.
Signs parents may notice: A grinding sound at night, or your child mentioning jaw soreness or tightness in the morning.
What usually happens next: Most children outgrow the habit as their bite develops. Grinding tends to ease off between ages six and nine and often stops entirely by nine to twelve.
When to have it checked: If grinding is frequent, if you can see visible wear on the teeth, or if your child regularly complains of jaw discomfort, it’s worth mentioning at a checkup so a dentist can keep an eye on it.
Gum Inflammation
Gum disease isn’t just an adult concern. Children can develop early gum inflammation, usually from plaque buildup along the gumline.
Why it happens: Missed spots during brushing let plaque accumulate, which irritates the gum tissue.
Signs to watch for: Gums that look red or puffy, or that bleed a little during brushing or flossing.
Prevention: Consistent brushing and flossing, along with regular professional cleanings, are usually enough to keep this from progressing.
When to have it checked: If bleeding happens regularly, not just occasionally, it’s a reasonable thing to bring up at your child’s next visit.
Bite and Alignment Issues
Sometimes teeth come in crowded, crooked, or misaligned — what dentists call malocclusion.
Why it happens: Genetics plays a role, but so do factors like early loss of a baby tooth or prolonged oral habits such as thumb sucking.
Signs to watch for: Visibly crowded or overlapping teeth, a bite that doesn’t quite line up, or your child breathing through their mouth more than usual.
Why early monitoring helps: Catching alignment concerns while a child’s jaw is still developing gives a dentist more options and more time to plan ahead, rather than addressing it later.
When to have it checked: If you notice any of the signs above, mention it at a routine checkup — this isn’t usually urgent, but it’s worth tracking.
Dental Injuries: What Actually Counts as an Emergency
This is the one area where timing genuinely matters, so it’s worth knowing the difference between “watch it” and “call now.”
Call right away for: a knocked-out tooth, a badly chipped or cracked tooth, a toothache that doesn’t ease up, swelling in the face or gums, or any mouth injury from a fall or sports impact.
For a permanent tooth that’s been knocked out, handle it by the crown (not the root), rinse it gently with water if it’s dirty, and if you’re able to, place it back in the socket and hold it in place on the way to the dentist. If that’s not possible, keep it moist — in milk, if you have it — and get to a dentist as quickly as you can. A baby tooth is different: don’t try to reinsert it. Have your child seen so the dentist can check that nothing else was affected.
A simple prevention step: if your child plays organized sports, a properly fitted mouthguard can meaningfully lower the risk of a dental injury during play.
If your child is dealing with dental pain, swelling, or an injury, call your dentist’s office directly — emergency dental care shouldn’t wait for the next scheduled visit.
Fluoride and Prevention: What’s Changed in Calgary
Fluoride strengthens enamel and makes it more resistant to the acid that causes decay, which is why it’s a consistent part of dental prevention advice. For over a decade, Calgary’s drinking water didn’t include added fluoride — the city discontinued the practice in 2011. Research comparing children in Calgary and Edmonton, where water has remained fluoridated since 1967, found a noticeably higher rate of cavities in baby teeth among Calgary children during that period.
That changed on June 30, 2025, when the City of Calgary reintroduced fluoride to its drinking water, following a 2021 municipal vote in favour of the change. It’s a meaningful shift for families here, since community water fluoridation is one of the most consistent, low-effort ways to support kids’ dental health at a population level — on top of the toothpaste and dental-visit fluoride most families already rely on.
Practical Prevention Tips for Parents
- Brush twice daily with a fluoride toothpaste appropriate for your child’s age
- Encourage water instead of sugary drinks between meals, and avoid bottles of milk or juice at bedtime
- Build a simple, calm bedtime brushing routine rather than rushing through it
- Keep up with six-month checkups, even when nothing seems wrong — many of these issues are easiest to manage when caught early
- If your child plays contact sports, ask about a properly fitted mouthguard
When Should My Child See a Dentist?
Beyond routine six-month checkups, it’s worth booking a visit sooner if you notice: a spot or discoloration on a tooth, gums that bleed regularly, a bite that looks off, a habit like thumb sucking that’s still intense past age four, or any injury to the mouth or teeth. When in doubt, a short assessment is a low-stress way to get a clear answer rather than waiting to see if something resolves on its own.
Frequently Asked Questions
Why do kids get cavities so easily?
Children’s enamel is thinner than adult enamel, and habits like consistent brushing are still developing — that combination makes decay more likely without regular prevention.
Is thumb sucking bad for a child’s teeth?
Not usually, especially in toddlers. It becomes more relevant if the habit is intense and continues past the point where permanent teeth are erupting.
Do kids really grind their teeth in their sleep?
Yes, it’s common and usually not a cause for concern. Most children outgrow it on their own as their bite develops.
Does gum disease happen in children?
Early gum inflammation can occur from plaque buildup, but it’s generally preventable with consistent brushing, flossing, and cleanings.
What counts as a dental emergency for a child?
A knocked-out or badly chipped tooth, a toothache that won’t ease up, facial or gum swelling, or any injury from a fall or sports impact — these are worth calling the dentist about right away rather than waiting.
What should I do if my child’s tooth gets knocked out?
For a permanent tooth, time matters — handle it by the crown, try to keep it moist, and call your dentist immediately. For a baby tooth, don’t try to reinsert it; have it checked instead.
Is there fluoride in Calgary’s water again?
Yes. The City of Calgary reintroduced fluoride to the drinking water supply on June 30, 2025, after not fluoridating for over a decade.
How can I help prevent cavities at home?
Consistent brushing with fluoride toothpaste, limiting sugary snacks and drinks, and keeping up with regular dental checkups are the most effective everyday steps.
Getting Your Child’s Teeth Checked
Most of what’s covered here is manageable with steady home habits and routine visits — the goal isn’t to worry, just to know what’s typical and what’s worth a closer look. If you’re due for a checkup or have a concern about your child’s teeth, children’s dental care in South Calgary is a good next step, and our team is happy to answer questions along the way.
Sources:
American Academy of Pediatric Dentistry,
