Tooth decay is one of the most common concerns for children, and the back teeth are particularly vulnerable. Their deep grooves and pits can trap food and bacteria even after careful brushing, leaving them at higher risk of developing cavities.
At MyHM Dentist in Kellyville, Dr Hiromi Matsuoka takes a preventive approach to children’s dental care and discusses fissure sealants with parents as part of a child’s regular check-up when she considers them appropriate.
Quick Overview
- Dental sealants for kids are thin protective coatings applied to the chewing surfaces of back teeth to reduce the risk of decay
- They may be appropriate for children whose back teeth have deep grooves or pits, though not every child or every tooth requires them
- The procedure does not involve drilling and is typically completed within a single appointment
- How long sealants last and how well they hold up depend on the individual child’s bite, oral habits, and how the sealant is maintained over time
- A dental check-up is the starting point for assessing whether sealants may be a suitable option for your child
The sections below outline what dental sealants are, when they are typically recommended, and what the procedure involves.
What Are Dental Sealants for Kids?
Dental sealants for kids are thin coatings of tooth-coloured material applied to the grooves on the chewing surfaces of back teeth. Fissure sealants fill up the grooves in teeth and help stop food and bacteria from sticking there, which can reduce the risk of tooth decay developing inside those grooves.
The sealant material bonds to the tooth surface and creates a smoother surface that is easier to keep clean. It is usually white or clear and may contain fluoride.
Why Are Back Teeth at Higher Risk of Decay?
The molars at the back of the mouth have naturally narrow grooves and pits on their biting surfaces. These fissures can be difficult to clean thoroughly, even with careful brushing, because toothbrush bristles cannot always reach into the tightest areas.
When food particles and bacteria become trapped in these grooves repeatedly over time, the risk of decay developing inside the tooth increases. Fissures are a common site for decay to start, and sealants are a routine preventive treatment for children and teenagers whose teeth have deep grooves.
Not every child needs sealants. A dentist will assess the depth and shape of the grooves as well as the child’s individual risk of decay before discussing whether sealants may be worth considering.
When Are Dental Sealants Usually Applied?
Sealants are most commonly applied to the first permanent molars, which typically come through around age six or seven. These teeth sit at the back of the mouth and are often missed during brushing while children are still developing their technique.
The second permanent molars usually erupt around age eleven to thirteen and may also be assessed for sealants around this time. Applying sealants soon after the molars emerge means the grooves are protected before decay has a chance to develop.
In some cases, a dentist may discuss sealants for primary (baby) molars as well, particularly where the grooves are especially deep or where a child has a higher risk of decay.
What Does the Procedure Involve?
Applying dental sealants does not require drilling or the removal of any tooth structure. Most children find the process straightforward. The tooth is cleaned and dried thoroughly, then a mild gel is applied briefly to prepare the surface for bonding.
The sealant material is then flowed into the grooves and set with a special light, which hardens it within seconds. The dentist checks that the sealant sits comfortably in the bite before the appointment is complete. The whole process takes only a few minutes per tooth.
How Long Do Dental Sealants Last?
How long a sealant remains intact depends on the individual child. Factors that may affect durability include the child’s bite, their chewing habits, and whether they attend regular check-ups. With proper care and routine dental visits, sealants may provide protection for several years.
It is important to remember that sealants cover only the grooved chewing surfaces of the sealed teeth. Sealants need to be checked regularly and work best alongside consistent brushing, flossing, and dental check-ups. All tooth surfaces and the spaces between teeth still need consistent home care.
A Considered Approach to Children’s Dental Health at MyHM Dentist
Dental sealants for kids are one of several preventive options a dentist may discuss as part of a child’s overall oral health plan. Whether or not they are appropriate depends on each child’s teeth and individual risk factors.
At MyHM Dentist Kellyville, Dr Hiromi Matsuoka takes time to explain each child’s dental situation clearly and answer any questions parents may have before any treatment is considered. If you would like to discuss whether dental sealants may be suitable for your child, we welcome you to get in touch.
Contact MyHM Dentist today on (02) 9158 6379.
Frequently Asked Questions
Can a child eat and drink normally after sealants are applied?
In most cases, children can eat and drink straight away once the sealant has been set and checked by the dentist. There is no extended waiting period after the appointment. Your dentist will let you know if there are any specific things to be mindful of based on the materials used and your child’s individual situation.
Will dental sealants change how my child’s teeth feel when biting?
Once placed, the dentist checks the sealant against the bite and adjusts it if needed so it sits comfortably. Some children notice a slight difference initially as they get used to the smooth surface over the grooves, but this typically settles quickly. If your child mentions persistent discomfort after the appointment, it is worth letting the dentist know so they can check the fit.
References
Healthdirect Australia. (2025). ‘Dental fissure sealants’. Healthdirect Australia, 16 October. Sydney, NSW: Healthdirect Australia. https://www.healthdirect.gov.au/dental-fissure-sealants
Australian Dental Association. (n.d.). ‘Fissure sealant’. Teeth.org.au. Sydney, NSW: Australian Dental Association. https://teeth.org.au/fissure-sealant
Better Health Channel. (n.d.). ‘Dental sealants’. Better Health Channel. Melbourne, VIC: Victorian Government Department of Health. https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/dental-sealants
