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Fissure seals: a simple, painless way to protect back teeth
July 26th, 2026 | by Dr Helen FungIf your child’s clinician has mentioned “fissure seals” or “sealants” at a check-up, you might be wondering what they are and whether your child actually needs them. The good news is that fissure seals are one of the simplest, gentlest things we do at Tooth Town — there’s no drilling, no needles and usually no fuss at all. This guide explains what fissure seals are, how they help protect your child’s back teeth, and what to expect if your child’s clinician recommends one.
What is a fissure seal?
Fissure seals are a thin protective coating applied to the chewing surfaces of back teeth, usually the molars. These teeth naturally have small grooves and dips — called fissures — across their biting surface. A fissure seal flows into those grooves and sets to form a smooth, protective barrier over them.
The seal itself doesn’t change how a tooth looks or feels to your child. It’s simply a preventive layer that sits over an area of the tooth that can be harder to keep clean.
Why the grooves on back teeth need extra help
The deep grooves on molars are a normal part of how these teeth are shaped, but they can make thorough brushing more difficult. Even with careful brushing, a toothbrush bristle may not always reach right into the base of a narrow fissure. Food and plaque can settle into these grooves, which is part of why back teeth are more prone to decay than the smoother, easier-to-clean surfaces of other teeth.
A fissure seal helps by covering these grooves, making the surface smoother and easier to keep clean — reducing the areas where plaque and food can become trapped.
How the seal is applied
Applying a fissure seal is usually quick and can often be done at a routine check-up visit. In general, the process involves:
- Cleaning and preparing the surface of the tooth
- Applying the seal material into the grooves
- Setting the seal, often using a curing light
There’s no drilling and no injection involved, which is part of why fissure seals tend to be so well tolerated — even by children who feel anxious about dental visits. Most children find the whole process comfortable, and it’s often completed in just a few minutes per tooth.
How long do seals last?
Fissure seals are designed to be durable, but like any part of the mouth, they’re checked over time. At your child’s regular check-ups, your child’s clinician will look at the seal and confirm it’s still intact and doing its job. If a seal has worn or chipped in places, it can generally be reapplied or topped up as needed.
This is one of the reasons regular check-ups matter — they give us the chance to keep an eye on seals (and everything else) and address anything early, calmly and simply.
Does every child need fissure seals? Does every tooth need one?
Not necessarily. Whether a fissure seal is recommended depends on the individual tooth — things like how deep its grooves are and how at-risk that particular tooth may be. This is a decision your child’s clinician makes after examining your child, not something that applies the same way to every child or every tooth.
If a seal isn’t recommended for a particular tooth, it doesn’t mean anything is wrong — it simply means your child’s clinician has assessed that tooth and decided a seal isn’t the right fit for it at this time.
Fissure seals are prevention, not treatment
It’s worth understanding that fissure seals are a preventive measure. They’re designed to reduce the risk of decay starting in a tooth’s grooves — they aren’t a treatment for decay that’s already present. If a tooth already has decay, your child’s clinician will talk you through the appropriate treatment options for that tooth instead.
Fissure seals also aren’t a stand-alone solution. They work best as one part of a broader prevention plan that includes regular brushing, a healthy diet that helps limit tooth decay risk, and appropriate fluoride use, alongside regular check-ups.
Frequently asked questions
Does getting a fissure seal hurt?
No. There’s no drilling and no injection involved, which makes it one of the more comfortable things we do at a check-up. Most children tolerate it very well.
Will fissure seals stop my child from ever getting a cavity?
No treatment can guarantee that. Fissure seals reduce the risk of decay starting in the grooves of back teeth, but they work alongside — not instead of — good brushing, a healthy diet and regular check-ups.
Can fissure seals be applied to baby teeth as well as adult teeth?
Your child’s clinician will assess each tooth individually and let you know which teeth, if any, are suitable for a seal.
What if my child already has a filling in that tooth?
Fissure seals are a preventive measure for tooth surfaces that haven’t decayed. If a tooth already needs treatment, your child’s clinician will explain the appropriate options for that specific tooth.
How will I know if my child needs a fissure seal?
Your child’s clinician will assess this at a check-up and let you know if a seal is recommended, and for which teeth.
Do I need to do anything differently at home once a seal is placed?
No special routine is needed — keep up your child’s normal brushing, diet and fluoride habits. Your child’s clinician will let you know if anything specific applies to your child.
What to do next
If you’d like to know whether fissure seals may be suitable for your child, our team is happy to talk it through at their next check-up. Book an appointment and we’ll assess your child gently, explain what we find, and let you know if a seal — or anything else — is recommended.
This guide is general information and doesn’t replace an individual assessment. Your child’s clinician will confirm what’s most appropriate for them after examination.
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Hidden sugars: the everyday foods that surprise parents most
July 26th, 2026 | by Dr Helen FungMost parents already know to watch out for the obvious things — lollies, chocolate, soft drink. But some of the biggest surprises for tooth health come from foods that seem perfectly healthy, or are marketed that way. This isn’t about cutting foods out or feeling guilty about what’s in the pantry. It’s simply about knowing where sugar likes to hide, so you can make small, easy adjustments that protect your child’s teeth without turning mealtimes into a battle. A little awareness goes a long way.
Why “healthy-looking” foods can still catch parents out
Food packaging can be genuinely confusing. Words like “natural,” “no added sugar” or “made with real fruit” sound reassuring, but they don’t always tell the full story about how much sugar ends up in your child’s mouth, or how long it stays there. Some of the foods that surprise parents most include:
- Flavoured yoghurts and yoghurt pouches — often marketed as a healthy snack, but many contain more sugar than a plain yoghurt with fresh fruit added at home.
- Muesli bars and cereal bars — frequently positioned as a “better” snack choice, yet many are quite sweet and can be sticky, which matters for teeth (more on that below).
- Breakfast cereals — even some cereals aimed at children can be higher in sugar than expected, especially the more colourful, marketed varieties.
- Fruit juice and fruit drinks — including “100% juice.” Juice can still be high in sugar, and unlike whole fruit, it doesn’t come with the fibre that helps slow sugar absorption. It’s best treated as an occasional drink rather than an everyday one.
- Dried fruit — a concentrated source of natural sugar that’s also sticky, so it tends to cling to the surfaces of teeth rather than being cleared away quickly.
- Flavoured milks — a popular treat, but worth knowing they carry more sugar than plain milk.
- Sauces and condiments — tomato sauce is a common one that parents don’t always think of, and it can add up when used generously and often.
None of these foods need to be banned. It’s about knowing what’s in them so you can decide, as a family, where they fit.
Why frequency and stickiness matter more than the amount
Here’s the part that often surprises parents the most: it’s not just how much sugar your child eats, it’s how often, and how long it lingers on their teeth.
Every time your child eats or drinks something sugary, the bacteria in their mouth produce acid that attacks the tooth surface for a period of time afterwards. Saliva gradually neutralises that acid and helps teeth recover — but this takes time. If sugary foods or drinks are spread across the day through frequent snacking or sipping, teeth are under near-constant acid attack with little chance to recover in between. The same amount of sugar eaten in one sitting, such as with a meal, gives teeth a much better chance to bounce back afterwards.
Stickiness matters too. Sticky foods like dried fruit or chewy muesli bars cling to the grooves and surfaces of teeth, which can extend the amount of time sugar stays in contact with them.
This is why a small treat with lunch is generally kinder to teeth than the same treat grazed on throughout the afternoon.
Small swaps that add up
This isn’t about perfection — it’s about small, sustainable habits that make a real difference over time.
- Get a rough sense of where sugar sits on the ingredients list. Ingredients are listed from most to least by weight, so if sugar (or an alternative name for it) appears near the top, it’s a useful clue.
- Try plain yoghurt with fresh fruit added at home. It’s an easy way to keep the creamy texture kids enjoy while having more control over the sugar content.
- Make water the main between-meal drink. Milk and water are the friendliest everyday options for teeth; save juice and flavoured drinks for occasional treats.
- Keep sugary foods and drinks mainly to mealtimes. Grazing throughout the day gives teeth far less recovery time than the same food enjoyed alongside a meal.
- Rinse with water after something sticky, where practical. It won’t undo everything, but it can help clear some residue between brushes.
These habits work best alongside good brushing routines and appropriate fluoride use — see our guides for more detail. Small, consistent choices matter far more than any single “perfect” day.
Frequently asked questions
Is fruit juice really a problem if it’s 100% juice with no added sugar?
Even 100% fruit juice can be high in natural sugar, and it lacks the fibre found in whole fruit that helps slow things down. It’s fine as an occasional drink, but water and plain milk are better everyday choices for teeth.
Are dried fruit and muesli bars bad snacks?
Not “bad” — but worth knowing about. They’re sticky and can cling to teeth, so they’re best enjoyed with a meal rather than as a between-meal grazing snack, and followed by a drink of water where possible.
My child eats yoghurt every day — should I be worried?
Yoghurt can be a great everyday food. The main thing to check is whether it’s a flavoured variety with a lot of added sugar. Plain yoghurt with fresh fruit stirred in is a simple way to keep the benefits while reducing sugar.
Is it really about how often, not just how much?
Yes — frequency and stickiness are just as important as the total amount. Teeth need time to recover between sugar exposures, so spacing sugary foods around mealtimes rather than grazing all day is one of the most protective habits you can build.
Do I need to cut sugar out completely to protect my child’s teeth?
No. The goal isn’t elimination, it’s awareness and balance. Enjoying sugary foods occasionally, mainly at mealtimes, alongside good brushing habits, is a realistic and effective approach for most families.
How can I tell if these hidden sugars have already caused a problem?
It’s not something you can always tell just by looking. Regular check-ups let your child’s clinician assess their teeth properly and pick up on early signs of decay before they become bigger issues.
What to do next
If you’re wondering how your family’s everyday eating and drinking habits are affecting your child’s teeth, our team is always happy to talk it through — no judgement, just practical guidance. Regular check-ups are also the best way to catch any early signs of decay while they’re still easy to manage. Book an appointment and we’ll take a look at your child’s teeth and offer guidance tailored to them.
This guide is general information and doesn’t replace an individual assessment. Your child’s clinician will confirm what’s most appropriate for them after examination.
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Tooth decay in children: why it happens and how to prevent it
July 26th, 2026 | by Dr Helen FungTooth decay is one of the most common health issues in childhood — and one of the most preventable. If your child has a cavity, it doesn’t mean you’ve done anything wrong; lots of things affect a child’s teeth, and small everyday changes can make a big difference. This guide explains, in plain terms, why decay happens and the simple habits that help protect your child’s smile.
What is tooth decay?
Our mouths are home to lots of bacteria. When we eat or drink things containing sugars, those bacteria produce acid. Over time, repeated acid attacks can weaken the hard outer surface of the tooth (the enamel) and create a cavity — a hole that usually needs a dentist’s help to fix.
The key word is repeated. It’s not just how much sugar a child has, but how often — because every sip or snack starts a new acid attack. That’s why grazing through the day, or sipping sweet drinks slowly, can be harder on teeth than the same treat eaten in one sitting.
Why do baby teeth matter if they fall out anyway?
It’s a fair question. Baby teeth do more than fill the gap until adult teeth arrive — they help your child eat, speak and smile with confidence, and they hold space for the adult teeth developing underneath. Decay in baby teeth can be uncomfortable for your child and can affect the teeth that follow, so looking after them is well worth it.
Signs to watch for
Early decay often has no symptoms at all, which is why regular check-ups matter. As it progresses, you might notice white, brown or dark spots on a tooth, sensitivity to hot, cold or sweet things, or your child mentioning a sore tooth. If you ever notice a spot you’re unsure about, or your child has tooth pain, it’s worth booking a check — early problems are usually simpler to manage.
Everyday habits that help prevent decay
The good news is that prevention comes down to a handful of simple, achievable habits.
Brush twice a day. Help or supervise brushing morning and night — young children don’t yet have the coordination to clean their teeth thoroughly on their own, and a hand from you makes all the difference. Ask us which toothpaste and how much is right for your child’s age — see our fluoride guide for more detail; the right choice changes as they grow.
Watch the frequency of sugary food and drinks. Keeping sweets and sweet drinks to mealtimes, rather than spread across the day, gives teeth time to recover between acid attacks.
Make water the everyday drink. Water (especially tap water) is the best drink for teeth. Juice, cordial, soft drink and flavoured milk are much higher in sugar than many parents expect, even the “natural” ones.
Be mindful of hidden sugars and sticky snacks. Dried fruit, muesli bars, crackers and many “healthy” snacks can cling to teeth. It’s not about banning anything — just being aware helps.
Avoid sending your child to bed with a bottle of anything other than water, as pooling liquid overnight is tough on little teeth.
Keep up regular dental check-ups. Seeing us regularly means we can spot small issues early, apply preventive treatments where helpful, and give you tailored advice for your child.
How we help at Tooth Town
Prevention is at the heart of what we do. At a check-up we assess your child’s teeth, talk through their individual risk, and suggest preventive steps — which may include professional cleaning, advice on brushing and diet, or protective treatments such as fissure sealants where appropriate. If a tooth does need treatment, we’ll explain the options clearly and make the experience as calm and child-friendly as possible. What’s right for your child is always confirmed after we’ve examined them.
Frequently asked questions
What causes cavities in children?
Cavities form when bacteria in the mouth turn sugars into acid that gradually weakens the enamel. How often a child eats or drinks sugary things matters as much as how much.
Are cavities in baby teeth a problem if they’ll fall out?
Yes, they can be. Baby teeth help your child eat and speak, and hold space for the adult teeth. Decay can cause discomfort and affect the teeth developing underneath, so it’s worth treating.
How can I prevent my child getting tooth decay?
Brush twice a day with help, keep sugary foods and drinks to mealtimes, make water the everyday drink, be mindful of sticky snacks, and keep up regular check-ups.
Is juice bad for my child’s teeth?
Juice and other sweet drinks are much higher in sugar than many people realise and, sipped often, can contribute to decay. Water and plain milk are the friendliest choices for teeth.
How often should my child see a dentist?
Regular check-ups let us catch small issues early and keep prevention on track. We’ll recommend a schedule that suits your child at their visit.
What toothpaste should my child use?
The right toothpaste and amount depends on your child’s age. Ask us or your child health nurse and we’ll guide you — it changes as they grow.
What to do next
The simplest, most powerful thing you can do for your child’s teeth is keep up regular check-ups alongside good habits at home. If it’s time for a visit, or you’ve noticed something you’d like checked, book an appointment with our friendly team — we’re here to help, without judgement and at your child’s pace.
This guide is general information and doesn’t replace an individual assessment. Your child’s clinician will confirm what’s most appropriate for them.
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Toothbrushing by age: what changes as your child grows
July 26th, 2026 | by Dr Helen Fung“Am I still meant to be brushing his teeth for him?” is a question we hear often — and a really useful one to ask, because the honest answer is that toothbrushing genuinely looks different at every age and stage. What’s needed for a one-year-old is not what’s needed for a seven-year-old, and there’s no need to guess your way through it. This guide walks through how brushing changes as your child grows, some tips for the trickier moments, and when it’s reasonable to start handing over more independence. Good brushing habits are also one of the simplest everyday ways to help protect against tooth decay.
From the very first tooth
Brushing starts as soon as that first tooth appears, usually somewhere in the first year. At this stage, it’s entirely a parent or carer’s job — a soft, small brush wiped or brushed gently over the tooth (or teeth) twice a day, ideally as part of the morning and bedtime routine. It doesn’t need to take long, and a squirmy, unimpressed baby is completely normal. The goal at this age is simply building the habit and getting your child used to having their mouth cared for, rather than achieving a perfect clean.
The toddler and preschool years
As more teeth come through, brushing becomes a bit more involved — but the responsibility still sits with you. Most young children don’t yet have the fine motor skills to brush their own teeth effectively, even if they’re keen to hold the brush and “have a go.” A great approach many families use is letting your toddler brush first (this is where their enthusiasm and independence get to shine), and then a parent or carer finishes the job to make sure all the surfaces are properly cleaned. Twice a day, for about two minutes each time, is the general aim — a timer, a favourite two-minute song, or a fun brushing app can help make this easier for everyone.
The primary school years: building toward independence
This is the stage where children genuinely start developing the coordination needed to brush well on their own — but it doesn’t happen overnight, and it’s different for every child. Many children still need a parent or carer to brush for them, or to check and finish the job afterwards, well into the primary school years. Rather than working to a fixed age, it’s more useful to watch for your child’s actual dexterity and thoroughness — can they reach the back teeth, the inner surfaces, and the gumline consistently well on their own? Until you’re confident they can, staying involved (even just supervising and doing a “top up” clean) makes a real difference.
If you’re ever unsure whether your child is ready to brush unsupervised, or how much involvement is right for their age and stage, that’s exactly the kind of question our team is happy to talk through with you at a check-up. All of the general dentists consulting at Tooth Town are well versed in hands-on brushing technique guidance, and can show your child directly how to brush well in a way that’s encouraging and easy for them to follow.
Making brushing a habit that sticks
A few things tend to help, whatever your child’s age:
- Keep it to twice a day, about two minutes each time. Morning and bedtime are usually easiest to build into the routine, and bedtime brushing matters most since saliva flow slows down overnight.
- Use a timer, song or brushing app. Two minutes can feel like a long time to a young child — a favourite song or a visual timer takes the pressure off having to “just know” when it’s done.
- Let them have a go first. Especially for toddlers and young children, starting with their own attempt (before you finish the job) builds confidence and a sense of ownership over the routine.
- Choose a toothbrush they’re excited about. A favourite colour or character, and a brush head sized appropriately for their mouth, can make a surprising difference to cooperation.
- Make it part of a predictable routine, ideally alongside another wind-down activity like a bedtime story, so it becomes automatic rather than a battle each time.
When brushing turns into a tantrum
Brushing resistance is extremely common, especially in toddlers, and it doesn’t mean you’re doing anything wrong. A few things that often help:
- Stay calm and matter-of-fact. Children often pick up on tension, so a relaxed, “this is just what we do” tone tends to work better than pleading or frustration.
- Offer small, genuine choices. Which toothbrush, which flavour toothpaste, or “teeth first or pyjamas first” can give your child a sense of control without turning brushing itself into a negotiation.
- Try songs, stories or a mirror. Letting your toddler watch themselves brush, or turning it into a short game, can shift the mood without much effort.
- Avoid shaming or punishing. Resistance to brushing is a normal developmental phase for many children, not defiance to be corrected. A calm, consistent approach over time works far better than pressure.
- Get it done gently, even if it’s brief. On the hardest days, a quick, calm clean is better than skipping altogether — it doesn’t need to be perfect every time.
If brushing resistance is a persistent, significant struggle in your family — particularly for a child with sensory sensitivities or additional needs — please let us know. We can talk through some practical strategies suited to your child.
When to introduce flossing
Flossing becomes relevant once your child has two teeth that touch each other, which usually happens somewhere in the early years as the back baby teeth come in. Like brushing, flossing is a parent or carer job at first — most children won’t have the coordination to floss effectively on their own for quite some time. Floss picks (the small handled ones) are often easier for parents to manage than traditional floss, especially for wriggly children. If you’re not sure whether it’s time to start, or want to be shown the technique, just ask us at your child’s next check-up.
Frequently asked questions
At what age can my child start brushing their own teeth?
There’s no single age that applies to every child — it depends on their individual coordination and dexterity, which develops at different rates. Many children still need a parent or carer to brush for them, or to check and finish the clean, well into the primary school years. If you’re unsure where your child is at, we’re happy to guide you at a check-up.
How much toothpaste should I be using, and does it change with age?
Yes, the appropriate amount and toothpaste strength does change as your child grows. Rather than a single blanket rule, we tailor this advice to your child — ask our team or your child health nurse, who can talk you through what’s right for your child’s current age and stage. Our full guide to fluoride for children covers this in more detail.
My toddler screams every time we try to brush their teeth. What can I do?
This is very common and not a sign you’re doing anything wrong. Staying calm, offering small choices, using songs or a timer, and keeping the process brief but consistent all tend to help. If it’s a persistent struggle, we’re happy to talk through some strategies with you.
Is it okay to let my child “practise” brushing on their own even if I still finish the job?
Yes — letting a toddler or young child have a go first, before a parent or carer finishes the clean, is a great way to build their confidence and independence over time without compromising on a thorough clean.
When should I start flossing my child’s teeth?
Generally once two of your child’s teeth are touching, which often happens as the back baby teeth come through. Flossing is usually a parent or carer job at first — ask us to show you the technique if you’re unsure.
Who can help if I want hands-on guidance about brushing technique?
All of the general dentists consulting at Tooth Town provide personalised, practical guidance on brushing technique for children of all ages, and can show your child directly how to brush well. Just ask at your next check-up.
What to do next
Brushing habits change a lot over the years, and it’s completely normal to wonder whether you should still be involved or whether your child is ready to take over. If you’d like some hands-on guidance, or it’s time for your child’s next check-up, book an appointment with our friendly team — we’re always happy to talk through what’s right for your child’s age and stage.
This guide is general information and doesn’t replace an individual assessment. Your child’s clinician will confirm what’s most appropriate for your child.
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