Fissure Sealants for Children: Are They Right for Your Child?
Fissure sealants are one of the most effective preventive dental treatments available for children, yet many parents have never heard of them or are not sure whether their child could benefit. Tooth decay remains one of the most prevalent preventable health conditions affecting children in the UK, and fissure sealants offer a simple, painless way to significantly reduce the risk of cavities in the teeth most vulnerable to it. Our children’s dentistry team at Gorgie Road Dental Practice discusses fissure sealants regularly with parents across Edinburgh and can help you decide whether the treatment is appropriate for your child.
The evidence supporting fissure sealants is compelling. A guide published by the NHS describes fissure sealants as a protective coating placed on the chewing surfaces of the back teeth, where the majority of childhood cavities occur. According to NHS Inform Scotland’s guidance on children’s oral health, dentists can help protect children’s teeth by placing fissure sealants in the grooves of the back teeth — a straightforward preventive measure that can make a meaningful difference to a child’s long-term dental health.
What Are Fissure Sealants?
The chewing surfaces of the back teeth — the molars and premolars — are covered with small grooves and pits known as fissures. These natural features of tooth anatomy are excellent at grinding food but are also highly susceptible to decay. The fissures are often so narrow that toothbrush bristles cannot reach the base of them, meaning that food particles and bacteria can accumulate there even with diligent brushing. Over time, this leads to acid production by bacteria, which breaks down the enamel and eventually causes a cavity.
A fissure sealant is a thin layer of dental material — usually a tooth-coloured resin — that is painted onto these grooves and allowed to harden. Once set, it creates a smooth, sealed surface that is much easier to clean and that physically prevents food and bacteria from reaching the vulnerable areas of the tooth. The sealant essentially fills in the fissures, removing the hiding places where decay tends to begin.
How Effective Are Fissure Sealants?
Fissure sealants are highly effective when applied correctly and allowed to remain intact. Studies have shown that they can reduce the risk of decay in molar teeth by up to 80 percent. This is a substantial reduction, particularly in children whose back teeth are at the highest risk. The effectiveness is greatest in the period immediately after the teeth erupt, when the enamel is still maturing and therefore most vulnerable. This is why timing the application of sealants correctly is important.
It is worth noting that fissure sealants do not replace the need for good brushing habits and a sensible diet. They protect the chewing surfaces of the back teeth but do not cover the sides of teeth or the spaces between teeth, where interdental decay can still occur. They work best as part of a broader preventive approach that includes twice-daily brushing with fluoride toothpaste, limiting sugary food and drink, and attending regular dental check-ups.
At What Age Are Fissure Sealants Applied?
Fissure sealants are most commonly applied in two stages, reflecting the timing of when the back permanent teeth come through:
- Around age 6 to 7: The first permanent molars erupt at the back of the mouth. These are sometimes called the six-year molars because of when they typically appear. They are particularly important teeth — they will be in use for the rest of the child’s life — and they are often sealed shortly after they come through.
- Around age 11 to 14: The second permanent molars erupt and the premolars come through as well. These teeth may also be suitable for fissure sealants, depending on their anatomy and the overall risk profile of the child.
The key consideration is that sealants should ideally be placed as soon as possible after a tooth erupts, while the enamel is new and before any early decay has had the chance to develop. Your dentist will assess each tooth individually and recommend sealants where the anatomy and risk level justify them.
What Does the Treatment Involve?
One of the greatest advantages of fissure sealants is that the procedure is entirely painless and requires no drilling or removal of tooth structure. The process is straightforward and typically takes only a few minutes per tooth:
- The tooth is thoroughly cleaned and dried.
- A mild acidic gel is applied briefly to the tooth surface to create a slightly roughened texture that helps the sealant bond securely. This does not cause any discomfort.
- The gel is rinsed off and the tooth is dried again.
- The sealant material is painted into the fissures using a small brush.
- A special curing light is held over the sealant for a few seconds to harden it.
- The dentist checks that the bite feels comfortable and makes any minor adjustments.
The entire process for a single tooth takes just two to three minutes. Multiple teeth can be treated in a single appointment, making it a very efficient use of appointment time. Many children manage the procedure with ease, particularly if they are already comfortable attending the dentist for regular check-ups.
How Long Do Fissure Sealants Last?
Fissure sealants are durable but not permanent. They typically last between five and ten years with good care, though they do need to be checked at each routine dental appointment to ensure they remain intact. If a sealant chips or partially wears away, it can be topped up or replaced. A compromised sealant that is not repaired may actually trap bacteria beneath it and accelerate decay, which is why monitoring at check-ups is important. This is another reason why keeping up with regular appointments matters even when children’s teeth appear healthy.
Are Fissure Sealants Available on the NHS?
In Scotland, fissure sealants are available as part of NHS dental treatment for children. All children up to the age of 18 are entitled to free NHS dental care, and fissure sealants can be provided as a preventive measure where the dentist determines they are clinically appropriate. Your dentist will assess your child’s teeth and discuss whether sealants are recommended at each check-up.
Fissure Sealants at a Glance
| Feature | Detail |
|---|---|
| What they protect | The chewing surfaces of back permanent teeth (molars and premolars) |
| When they are applied | Shortly after the back teeth erupt, typically ages 6-7 and 11-14 |
| How long they take | Around 2-3 minutes per tooth; multiple teeth treated in one visit |
| Pain involved | None — no drilling, no injections |
| Effectiveness | Can reduce decay risk in treated teeth by up to 80% |
| How long they last | Typically 5-10 years; checked at every routine appointment |
| NHS availability (Scotland) | Available free of charge for anyone under 26 |
Is My Child a Good Candidate for Fissure Sealants?
Not every child will automatically need fissure sealants. The suitability of treatment depends on several factors, including the anatomy of your child’s teeth, their individual risk of decay, and their diet and brushing habits. Children whose teeth have deep, narrow fissures are at higher risk of decay in those areas and are more likely to benefit from sealants. Children with a history of cavities, a high-sugar diet, or difficulty cleaning their back teeth effectively are also good candidates.
By contrast, children whose teeth have naturally shallow grooves, who brush very effectively, and who have a low-sugar diet and no history of decay may not need sealants on every molar. Your dentist will assess each tooth individually and give you a clear, honest recommendation based on what they find during the examination.
Fissure Sealants as Part of a Broader Preventive Strategy
Fissure sealants work best as one part of a comprehensive approach to preventing childhood tooth decay. Combined with twice-daily brushing using an appropriate fluoride toothpaste, regular fluoride varnish applications at dental appointments, a diet low in free sugars, and routine check-ups every six months, sealants provide strong, targeted protection at the points where children’s teeth are most vulnerable.
Prevention is always preferable to treatment, particularly when it comes to children’s teeth. A cavity that requires filling means exposing a child to dental treatment that is more involved than a check-up, which — even when handled sensitively — is a less positive experience than preventive care. Avoiding that outcome is always worth investing in.
At Gorgie Road Dental Practice, our team is committed to helping children in Edinburgh maintain healthy teeth for life. We assess every young patient for the suitability of fissure sealants as part of our routine check-ups and are happy to discuss the treatment in detail with parents. If you would like to find out more or book an appointment, please give us a call on 0131 337 3936 — we would be glad to help.