2026-07-29

Do Baby Teeth Really Matter? Why Cavities in Baby Teeth Still Need Treating

"They're just going to fall out anyway" is one of the most common things we hear, and it's also one of the most costly myths in children's dentistry.

It's a completely understandable thought. Baby teeth are temporary, so why go to the trouble and expense of filling a cavity in a tooth that's destined to wobble out in a few years? The problem is that decay in baby teeth doesn't sit quietly and wait its turn, and those little teeth are doing far more important jobs than most people realise.

What baby teeth are actually for

Primary teeth aren't just placeholders. Between roughly six months and age six, they're helping your child chew properly through a normal, varied diet, and they help form the sounds needed for clear speech as your child learns to talk. Most importantly, they hold space and act as guides for the permanent teeth coming up underneath. If a baby tooth is lost too early to decay, the neighbouring teeth can drift into the gap, and the adult tooth can come through crowded or out of position, a problem you could have avoided becomes an orthodontic one later. And on top of all that, kids notice their smiles, and so do their friends, so painful or missing front teeth can knock a child's confidence at exactly the age it's forming.

An untreated cavity can be simply painful, too. Toothache disrupts sleep, eating and concentration at school, and decay left alone can progress to infection and an abscess. Decay is the single biggest reason Australian children lose teeth before those teeth are ready to go.

This is more common than parents expect

If your child has a cavity, you're far from alone. In the most recent national child oral health study, around 2 in 5 Australian children aged 5 to 10 had experienced decay in their baby teeth, and more than 1 in 4 had decay that was still untreated. Tooth decay is the most common chronic disease of childhood, more common than asthma. And it isn't always minor. There were around 88,600 hospital admissions in 2023 to 2024 for dental problems that could potentially have been prevented with earlier care, with the highest rate in children aged 5 to 9, many involving decayed teeth removed under general anaesthetic. Catching decay early genuinely keeps kids out of hospital.

The one to watch for in little ones: baby bottle decay

There's a specific, fast-moving type of early decay worth knowing about. It happens when babies and toddlers are put to bed with a bottle of milk, formula or sweet drink. As they sleep, the liquid pools around the upper front teeth, the sugars feed decay-causing bacteria, and saliva slows right down overnight, so the upper four front teeth are usually hit first, and it can progress surprisingly quickly. The good news is it's very preventable. Don't settle a baby to sleep with a bottle, never put sweet drinks or juice in one, and don't dip dummies in anything sugary. From around six months, start moving towards a feeding cup, and plain tap water is the best everyday drink from age one.

Why "they'll fall out anyway" backfires

Early childhood decay is often not noticed until the later, more serious stages, by which point it can't be reversed and the child needs more significant treatment. Leaving it alone risks pain, infection, early tooth loss and the crowding that follows, and in the worst cases a hospital trip for extractions. A small filling done early is quicker, cheaper, and much gentler on your child than any of those outcomes. Treating a baby tooth isn't over-servicing. It's avoiding a bigger problem.

How to keep your child's teeth healthy

Start visits early, the recommendation is a first check-up when the first tooth appears, or by your child's second birthday, so we can spot problems while they're easy to manage. Brush with the right toothpaste for their age (just water under 18 months, a pea-sized smear of low-fluoride toothpaste to age six, then standard fluoride toothpaste after that), spit rather than rinse, and help them brush until they can do a proper job themselves. Keep water as the main drink, minimise sugary foods between meals, and ask us about fissure sealants and fluoride.

Many families are also eligible for the Child Dental Benefits Schedule, covering up to $1,158 (2026) over two years towards a child's basic dental care. Cost should never be the reason a child's cavity goes untreated.

Baby teeth matter because the child attached to them matters. If it's time for your little one's first visit or a check-up, we see a lot of children in Kew and we keep it gentle and unhurried. Book any time at stradbrokedental.com.au.