The back teeth do most of the hard work when children chew, but they are also the hardest teeth to clean thoroughly. Their deep grooves and narrow pits trap food particles and bacteria that a toothbrush often cannot reach, making them particularly prone to cavities.
Dental sealants for kids offer a layer of protection over these vulnerable surfaces. They are a preventive option worth understanding, especially as children’s first and second permanent molars come through during primary school years. A conversation with your dentist about kids dentistry and preventive care can help you understand whether sealants are a suitable step for your child.
Quick Overview
- Dental sealants for kids are thin coatings applied to the chewing surfaces of back teeth to help block food and bacteria from settling in deep grooves.
- They are most often recommended when the first and second permanent molars come through, typically between ages six and twelve.
- The application is quick and does not involve drilling or injections, though individual suitability varies.
- How long sealants last depends on factors such as wear, diet, and how regularly they are checked.
- Whether sealants are appropriate for your child is best determined at a routine dental assessment.
Below, we explain how dental sealants work, when they are typically applied, what the procedure involves, and what to consider when discussing them with your dentist.
What Are Dental Sealants?
Dental sealants are thin protective coatings applied to the chewing surfaces of the back teeth, usually the molars. The back teeth have deep grooves, known as fissures, that are naturally prone to trapping food and bacteria. Even with careful daily brushing, toothbrush bristles often cannot reach into these narrow grooves to clean them effectively.
Sealants fill these deep grooves, creating a smoother surface that is easier to keep clean. The material used is typically a tooth-coloured resin or glass ionomer cement, both of which bond to the tooth surface and provide a physical barrier against decay. Some sealant materials also contain fluoride, which can offer added protection to the surrounding enamel.
What Does the Application Involve?
The process of applying dental sealants is straightforward and does not require drilling, injections, or anaesthesia. Most children find it comfortable, and applying sealants to protect back teeth typically takes only a few minutes per tooth.
The general steps involved are:
- The tooth is cleaned and dried
- A mild solution is applied briefly to the chewing surface to help the sealant bond
- The tooth is rinsed and dried again
- The sealant material is painted onto the grooves
- A special light is used to set the sealant in place
Once the sealant is set, the tooth surface is smooth, and the deep grooves are no longer exposed. Most children can eat and drink normally straight after the appointment.
How Long Do Sealants Last?
Sealants do not last indefinitely. They can wear down over time with normal chewing, and in some cases, a portion of the sealant may chip or come away. How long a sealant remains intact depends on the material used, the child’s diet, and how thoroughly the teeth are cared for between visits.
Most sealants are checked at each routine dental appointment. If wear or loss is detected, the sealant can be repaired or reapplied. The goal is to maintain coverage during the years when the teeth are most vulnerable to decay, typically from eruption through the mid-teenage years.
Do Sealants Replace Brushing and Fluoride?
Sealants protect the chewing surfaces of the back teeth, but they do not cover all surfaces of the tooth. Decay can still develop between teeth, along the gumline, and on surfaces not covered by the sealant. Daily brushing with fluoride toothpaste, flossing, and regular dental check-ups remain the foundation of good oral health.
Sealants are a preventive addition to an existing routine, not a replacement for it. Children who have sealants still need to brush twice a day, limit sugary foods and drinks, and attend regular appointments so their teeth and sealants can be monitored.
A Considered Approach to Children’s Dental Health
A Considered Approach to Children’s Dental HealthDental sealants for kids are one tool among several in a good preventive care plan. Whether they are appropriate depends on your child’s individual tooth shape, decay risk, and stage of dental development.
At Boutique Dental Care, the team takes a careful, child-centred approach to preventive dentistry. Call (02) 9054 5281 or book an appointment online to discuss your child’s dental health.
Frequently Asked Questions
At what age are dental sealants typically applied?
Sealants are most commonly placed when the first permanent molars come through, at around six or seven years of age, and again when the second permanent molars erupt at around eleven or twelve. The aim is to protect the teeth as soon as possible after they appear, before decay has a chance to develop. Your dentist will assess the timing based on your child’s individual dental development.
Can dental sealants be placed over early tooth decay?
In some cases, a dentist may recommend placing a sealant over a very early, non-cavitated area of decay to slow its progression. This is assessed on a case-by-case basis and depends on the extent and location of the decay. A sealant is not a substitute for a filling if decay has already progressed into the tooth structure.
Will my child be able to feel the sealant on their teeth?
Sealants are very thin and are shaped to sit within the grooves of the tooth. Most children do not notice them once they have been placed. In some cases, your dentist may check and lightly adjust the bite after application to ensure the sealant is not causing any discomfort when the teeth come together.
Do baby teeth ever receive sealants?
In most cases, sealants are recommended for permanent molars rather than baby teeth, as the focus is on protecting teeth that will last a lifetime. In some situations, a dentist may consider sealants for primary molars if a child has particularly deep grooves and a higher risk of decay, but this is not the standard recommendation.
Are dental sealants covered by the Child Dental Benefits Schedule?
Fissure sealants are listed as a covered service under the Australian Government’s Child Dental Benefits Schedule (CDBS), which provides eligible children aged two to seventeen with access to basic dental services. Eligibility depends on family circumstances, including receipt of certain government payments. It is worth checking your child’s CDBS eligibility before their appointment, as this may reduce or eliminate out-of-pocket costs.
References
Healthdirect Australia. (2025). ‘Dental fissure sealants’. Healthdirect Australia. Sydney, NSW: Australian Government. https://www.healthdirect.gov.au/dental-fissure-sealants
Better Health Channel. (n.d.). ‘Dental sealants’. Better Health Channel. Melbourne, VIC: Department of Health, State Government of Victoria. https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/dental-sealants
Teeth.org.au. (n.d.). ‘Fissure sealant’. Teeth.org.au. Australia: Australian Dental Association. https://teeth.org.au/fissure-sealant