Dental Sealants in Kitchener

Run your tongue over your back teeth and you’ll feel the bumps and dips on the chewing surfaces. Those dips are grooves, and in many teeth they’re narrower than a single toothbrush bristle. Food and bacteria settle into them and stay there, which is why the chewing surfaces of molars are where so many childhood cavities start. Dental sealants are a simple way to close those grooves off. At Highland Kitchener Dentist in Kitchener, we apply sealants for children, teens and the occasional adult whose teeth have deep, sticky grooves. Here’s what they are, who they help and what the appointment is like.

Why back teeth need extra protection

Front teeth have smooth surfaces that saliva and a toothbrush can keep fairly clean. Molars and premolars are different. Their chewing surfaces have pits and fissures, the natural folds left over from how the tooth formed. Some are shallow and easy to clean. Others are deep and narrow, and plaque tucks right down into them.

Fluoride does an excellent job of protecting smooth enamel, but it’s less effective deep in those grooves. That’s why a child can have a fluoride toothpaste habit, regular cleanings and fluoride treatments and still develop cavities on the tops of the back teeth. A sealant adds a physical barrier where fluoride doesn’t reach as well.

The timing matters

The first permanent molars usually come in around age six, and the second molars around age twelve. Newly erupted enamel is a bit softer and more vulnerable than mature enamel, and kids at those ages aren’t exactly expert brushers. Sealing the molars soon after they’ve fully come in protects them during the years when decay risk is highest.

Who is a good candidate for sealants?

We don’t recommend sealants for every tooth on every patient. We look at the shape of the grooves, the patient’s history of cavities and how well they can keep their back teeth clean. Sealants often make sense for:

• Children whose permanent molars have recently erupted
• Teens getting their second molars in
• Kids with a history of cavities in their baby teeth
• Patients with braces or other appliances that make brushing harder
• Adults with deep grooves and no fillings yet on those surfaces
• Patients with conditions or medications that cause dry mouth

A sealant can only go on a tooth surface that’s healthy or has the very earliest sign of enamel softening. If a groove already has a cavity, it needs a filling instead. Sometimes we’ll do a small conservative filling in one groove and seal the rest of the tooth in the same visit.

How sealants go on

This is one of the easiest appointments we do. There’s no needle, no drilling into healthy tooth and no numbing. For most kids, the hardest part is keeping their mouth open for a few minutes. The steps look like this:

1. Cleaning the groove. We clean the chewing surface thoroughly so nothing is trapped under the sealant.
2. Preparing the enamel. A mild conditioning gel goes on for a short time. It roughens the enamel at a microscopic level so the sealant can grip.
3. Rinsing and drying. The tooth is rinsed and dried, and we keep it dry with cotton or a small isolation device. Moisture is the main enemy of a good seal.
4. Painting on the sealant. The liquid resin flows into the grooves.
5. Hardening. A curing light sets the material in seconds.
6. Checking the bite. We make sure nothing feels high, and adjust if needed.

Each tooth takes only a few minutes. Your child can eat normally right after the appointment.

Caring for sealed teeth

A sealant protects the chewing surface, not the sides of the tooth or the spaces between teeth. Brushing and flossing are still just as important. Sealed teeth need the same care as any others, plus a few extra things to keep in mind:

• Avoid chewing ice and hard candy. They can chip a sealant (and teeth too).
• Keep up with regular checkups. We check sealants at every visit to make sure they’re intact.
• Tell us if something feels different. A rough spot on a back tooth can mean a sealant has worn or partly come away.

How long do sealants last?

Sealants can last for many years, but they do wear with chewing. Some last well into adulthood. Others need a touch-up after a few years. Repairing a sealant is quick and easy, usually just a matter of adding a bit more material where it’s worn. We’d rather patch a sealant than fill a cavity.

Sealants for Kitchener families: fitting them into checkups

We usually look at sealants during a regular checkup once the molars are fully in. If the grooves look deep, we’ll mention it and explain what we see. Sealants can often be placed at the same visit as a cleaning, or booked as a short separate appointment.

Many dental plans cover sealants for children, though coverage and age limits vary by plan. We can check with your insurer before the appointment if you’d like to know what’s covered.

Sealants compared with other ways to protect molars

Parents sometimes ask whether fluoride alone is enough, or whether a sealant replaces the need for good brushing. The honest answer is that each tool does a different job, and they work best together.

• Fluoride toothpaste and varnish strengthen enamel across the whole mouth, especially smooth surfaces and the early weak spots that can still harden again.
• Brushing and flossing physically remove plaque from every surface, including the sides of teeth and the gaps between them, which sealants don’t cover.
• Diet controls how often teeth are exposed to acid. A child who sips juice all day is at higher risk no matter what else is done.
• Sealants block off the grooves on chewing surfaces, the one spot where the other tools struggle most.

Think of a sealant as a raincoat for the top of the tooth. It’s very good at its one job, but it doesn’t cover the rest of you.

What we check before recommending them

Before suggesting a sealant, we look closely at the grooves, dry the tooth to see any chalky white spots that suggest early softening, and check recent x-rays for any decay hiding inside. A tooth that looks perfect on the surface can sometimes have a small cavity starting underneath the groove. Sealing over active decay isn’t something we’d do, so this step matters.

Sealant questions we hear often

Are sealants safe?

Dental sealants have been used for decades and are considered safe and effective by dental organizations. The amount of material involved is tiny. If you have questions about the specific material, ask us and we’ll explain.

Can you see a sealant?

Not really. Some sealants are clear, some are tooth-coloured and some are slightly white. They sit in the grooves of back teeth, so nobody will notice them when your child smiles.

Do baby teeth get sealants?

Occasionally. Baby molars stay in the mouth until around age ten to twelve, so if a child has deep grooves and a high risk of cavities, sealing them can be worthwhile. We’ll recommend it case by case.

Does my teenager still need them?

If the second molars have come in and there’s no decay on them yet, it’s worth considering. Teens often eat and drink more sugar and brush less carefully, so protection on those back teeth can be well timed.

A few minutes now can save a filling later. If you’d like us to check whether your child’s molars would benefit from sealants, call Highland Kitchener Dentist in Kitchener at 519-885-1598 and we’ll book a visit.

Related treatments

• Fluoride treatment
• Dental exams and cleanings
• Composite fillings

Questions or ready to book? Contact our Kitchener office or call 519-885-1598.