Key takeaways
- Baby teeth hold space for the adult teeth, so cavities in them affect the permanent smile too
- Never put a child to bed with a bottle of milk or juice; night feeding is a leading cause of toddler decay
- Brush twice daily with the age-appropriate amount of fluoride toothpaste, and keep helping until well into primary school
- Sealants and fluoride varnish are quick, gentle and help stop many cavities before they start
- Swelling, fever or pain that wakes your child at night warrants a same-day call to the clinic
Cavities in baby teeth are worth taking seriously, even though those teeth eventually fall out. Baby teeth hold space for the adult teeth forming underneath, and untreated decay can cause pain, infection and alignment problems that follow a child into their permanent smile. The good news is that childhood cavities are largely preventable with the right brushing routine, sensible feeding habits, fluoride and sealants. And when a cavity does appear, early, gentle treatment usually keeps it a small problem rather than a big one.
Why cavities in baby teeth matter
A child's 20 baby teeth are not just placeholders that conveniently fall out. Each one holds space for the permanent tooth developing underneath, guides it into position and helps the jaws grow evenly. When decay destroys a baby tooth early, neighbouring teeth drift into the gap, and the adult tooth can come through crooked, crowded or blocked. Deep decay can also reach the nerve and cause an abscess, and because that infection sits close to the developing permanent tooth bud, it can affect the new tooth as well.
There is also the simple matter of comfort. A child with toothache eats poorly, sleeps badly and struggles to concentrate at school, and very young children often cannot explain what hurts. That is why we recommend a first dental visit by the first birthday and regular check-ups through our paediatric dentistry service, so small problems can be caught while they are still quick and easy to fix.
Bottle and night-time feeding decay
One of the most common patterns we see in toddlers is decay of the upper front teeth, often called bottle decay or early childhood caries. It happens when a baby falls asleep with a bottle of milk, formula or juice and the liquid pools around the teeth for hours. Saliva flow drops during sleep, so nothing washes the sugars away, and the bacteria that cause decay feed all night. The earliest sign is a chalky white line along the gum edge of the front teeth, which later turns yellow or brown.
- Never put a child to bed with a bottle containing anything other than plain water
- Finish the last milk feed before the bedtime brush, not after it
- Do not dip dummies or pacifiers in honey, sugar or sweet syrups
- Start moving from bottle to an open cup around the first birthday
- Keep juice and sweetened drinks to mealtimes, in small amounts, if at all
Prevention at home: brushing, fluoride and diet
Twice-daily brushing with a fluoride toothpaste is the single most protective habit, and the bedtime brush matters most because saliva flow drops overnight. Use the right amount of toothpaste for your child's age, teach them to spit out the excess rather than rinsing with water, and keep brushing for them or checking their effort well into primary school. A useful rule of thumb: a child who cannot yet tie their own shoelaces does not yet have the hand control to brush thoroughly on their own.
Diet works alongside brushing. How often a child has sugar matters more than how much, because every sugary snack or sip starts an acid attack on the enamel that takes time to settle. Keep sweets, biscuits and juice to mealtimes, offer water or plain milk between meals, and be wary of sticky foods such as toffees, dried fruit and gummy vitamins that cling to the grooves of the teeth. Cheese, fruit and vegetables make far kinder snacks for teeth.
| Age | Toothpaste amount | Who brushes |
|---|---|---|
| Before the first tooth | None: wipe gums with a clean, damp cloth after feeds | Parent |
| First tooth to age 3 | A smear of fluoride toothpaste, the size of a grain of rice | Parent brushes |
| Ages 3 to 6 | A pea-sized amount of fluoride toothpaste | Parent brushes or closely supervises |
| School age onwards | A pea-sized amount of fluoride toothpaste | Child brushes, parent checks the result |
Extra protection at the clinic: sealants and fluoride varnish
The chewing surfaces of back teeth have deep grooves that toothbrush bristles cannot fully reach, which is why so many childhood cavities start there. Dental sealants solve this by flowing a thin protective coating into those grooves and sealing them off from food and bacteria. Placing a sealant is quick and gentle, involves no drilling or injections, and is usually done soon after the permanent molars come through. We check sealants at every visit and top them up if they wear.
Professional fluoride treatment adds another layer of defence. A fluoride varnish painted onto the teeth strengthens enamel and can help early chalky white spots repair themselves before they ever become true cavities. The application takes only a few minutes, tastes pleasant and needs no numbing, so even toddlers usually manage it well. For children who are prone to decay, we often recommend varnish at regular intervals alongside routine check-ups.
How cavities in children are treated
Treatment depends on how deep the decay has gone. A very early lesion can sometimes be halted with fluoride varnish and a tightened home routine, with no drilling at all. A small cavity is usually restored with a tooth-coloured filling in a single short visit. If decay has reached the nerve, the tooth can often still be saved with a gentle pulp treatment followed by a small crown to protect what remains. Only when a tooth truly cannot be saved do we remove it, and a space maintainer can then hold the gap open for the adult tooth.
Just as important as the dentistry is how it is delivered. Children's treatment at our clinic is guided by our consultant paediatric dentist Dr. Vanessa Lobo, who holds an MDS in Paedodontics and Preventive Dentistry and has nine years of experience helping anxious young patients feel at ease, with Dr. Puja Bansal overseeing every case. Appointments are kept short, each step is explained in child-friendly language before it happens, and nothing is forced. After the examination, parents receive a written, itemised estimate, so there are no surprises.
When to see a dentist urgently
Most childhood cavities grumble quietly, but some situations need same-day attention rather than a wait-and-see approach. Because infection can spread quickly in small children, it is always better to call than to hope a symptom settles on its own. Our Viman Nagar clinic is open seven days a week, and you can reach us on +91 70287 22200 for urgent advice about any of the signs below.
- Swelling of the gum, cheek or face, with or without pain
- Fever alongside a toothache
- Pain that wakes the child at night or stops them eating
- A pimple-like bump or pus on the gum near a tooth
- A tooth broken or knocked out in a fall
Cavities in kids FAQs
Sources & further reading: NHS, Dental Health; American Dental Association (MouthHealthy); World Health Organization, Oral Health; Indian Dental Association.
Questions about your own teeth? Call +91 70287 22200.
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