Why do baby teeth get cavities so easily?
Primary teeth have thinner enamel and larger nerves relative to their size than adult teeth. Once decay breaks through the enamel, it can reach the nerve surprisingly fast. Common contributing factors include:
- Frequent snacking and sweet drinks, including juice and flavoured milk
- Falling asleep with a bottle or while breastfeeding after teeth have erupted
- Sticky foods that cling to the grooves of back teeth
- Brushing that misses the gumline and the spaces between molars
- Cavity-causing bacteria passed on through shared spoons and cups
Early childhood decay often starts on the upper front teeth near the gums and between the back molars, places parents rarely see.
Do cavities in baby teeth need treatment?
Baby teeth are not just temporary placeholders. The back molars usually stay until around ages 10 to 12. They help children chew, speak clearly and hold space for adult teeth. An untreated cavity can lead to toothache, infection, swelling, early tooth loss and crowding of the adult teeth.
That said, not every cavity needs drilling. A very early lesion that has not broken the enamel surface can sometimes be reversed with fluoride and better brushing. A small cavity in a tooth that is already loose and due to fall out soon may simply be watched. Our role is to tell you clearly which situation your child is in.
How we find cavities early
During a children's dental visit we examine each tooth and use our Q-ray intraoral camera, which highlights plaque biofilm and early decay as coloured areas on screen. Small X-rays may be taken to check between molars, where cavities hide. Showing children and parents the images makes brushing advice much more concrete.
Treatment options, step by step
- Remineralising early spots. White chalky patches without a hole may be treated with professional fluoride and a home-care plan, then rechecked. Our page on sealants and fluoride explains these preventive tools.
- Tooth-coloured fillings. For small to moderate cavities, decay is removed and the tooth restored with a composite or similar tooth-coloured material, much like adult tooth-coloured fillings.
- Nerve treatment. When decay reaches the nerve of a baby tooth, a pulpotomy or pulpectomy removes the infected nerve tissue to keep the tooth until it is ready to fall out.
- Crowns for baby molars. Heavily damaged molars may need a crown so they last until the adult tooth comes in.
- Extraction and space maintenance. If a baby tooth cannot be saved, it is removed. Where losing it early could let neighbouring teeth drift, a space maintainer may be suggested.
Keeping treatment comfortable
When numbing is needed, we follow our 3-step painless anesthesia system, which many children tolerate well: a flavoured topical gel, cold numbing of the injection point, and a computer-controlled device that delivers anesthetic slowly. We explain each step in child-friendly words, use short sessions, and let your child signal when they need a pause.
After treatment
- Watch that your child does not bite their numb lip or cheek for a few hours
- Offer soft food once the numbness wears off
- Continue brushing the treated tooth normally from the same evening
- Book the recommended recall visit; children who have had one cavity are more likely to develop another
Preventing the next cavity
Treatment fixes damage, but prevention stops the cycle. Twice-daily brushing with fluoride toothpaste, parental help with brushing, flossing between touching molars, limiting sugary drinks to mealtimes, and regular fluoride applications all lower risk. Sealants protect the deep grooves of permanent molars as they erupt.
A note on night-time feeding
Parents often ask when to stop night feeds for the sake of their child's teeth. We will not judge your family's choices. Instead, we look at the teeth together, explain the risk we see and suggest practical changes, such as wiping the teeth after the last feed.
Risks and limitations
Fillings in baby teeth can wear or come loose, and new decay can form at their edges if habits do not change. Nerve treatment in baby teeth is not always successful, and an infected tooth may still need removal. Young children may need several short visits rather than one long one. Children with widespread decay who cannot cooperate may be better treated in a specialist setting under sedation; we will advise you honestly if that applies.
Why Gunpo parents trust us with baby teeth
We combine early detection with clear, unhurried explanations, so parents understand exactly what is happening and why. Weekend morning and weekday evening appointments make visits easier for working families near Sanbon and Daeyami. To have a suspected cavity checked, book your child's visit or read our guide to a child's first dental appointment.