What Are Dental Fissures?
Fissures are the natural deep grooves on the chewing surfaces of molar teeth. Their depth varies by individual; in some children they are so narrow and deep that toothbrush bristles cannot reach the bottom.
Fissures help us grind food during chewing, but they also trap plaque and food debris. Acid-producing bacteria thrive in these protected pockets — and this is exactly where most cavities begin.
Roughly 80% of cavities in children start in the fissures of molar teeth. For this reason, fissure protection is a cornerstone of pediatric preventive dentistry.
What Is a Dental Sealant?
A dental sealant is a thin, durable protective resin applied to the fissures of molar teeth. It is also commonly referred to as a "dental vaccine" — although it is not a vaccine, it works as a mechanical barrier against bacteria.
The resin bonds to the floor and walls of the fissure after light-curing, blocking bacteria and food debris from reaching the deepest parts of the tooth's grooves. The result: the high-risk fissure base is protected.
Modern sealants come in two main types: resin-based (the most common, light-cured) and glass ionomer-based (fluoride-releasing, more moisture-tolerant but less retentive). The pediatric dentist selects the appropriate type based on tooth eruption stage and the child's cooperation.
The American Academy of Pediatric Dentistry (AAPD) and the American Dental Association (ADA) recommend dental sealants as standard preventive care for children aged 6–7 and 11–13.
How Is a Dental Sealant Applied?
In modern pediatric practice, sealant placement is completed in a single visit and takes about 10–15 minutes. The procedure is painless, requires no anesthesia and does not involve drilling.
1. Tooth cleaning: The molar is professionally cleaned to remove plaque and debris. This step is critical for proper resin bonding.
2. Isolation: The tooth is isolated from saliva using cotton rolls or a rubber dam. Moisture compromises bonding, so isolation is essential.
3. Acid etch: A 35–37% phosphoric acid gel is applied for 15–30 seconds to create microscopic roughness on the enamel and improve resin retention. The acid is rinsed off and the tooth is dried.
4. Sealant placement: The flowable resin is delivered with a fine applicator into the floor and walls of the fissure. The resin self-flows into the grooves.
5. Light-curing: A blue LED light is applied for 20–30 seconds to harden the resin. The tooth now has a barrier against decay.
6. Bite check: The pediatric dentist verifies the bite and trims any excess. The child can eat and drink immediately.
What Age and Which Teeth?
Sealant timing follows tooth eruption. Application before full eruption complicates bonding; after a cavity has started, sealant loses its preventive role.
Age 6–7 — First permanent molars (6-year molars): These teeth often erupt without a baby tooth being shed, so parents may not notice them. Their fissures are deepest at eruption and the child cannot brush well at this age — making 6–7 the most critical window for sealants.
Age 11–13 — Second permanent molars (12-year molars): Erupting behind the first permanent molars, these teeth also have deep fissures and the child still struggles to clean the back of the mouth. Sealants are recommended again.
Primary molars: For high-caries-risk children (history of decay in baby teeth, enamel hypoplasia, special needs), sealants on primary molars may be considered. They are not routine.
Premolars: Usually not routine because their fissures are shallower; deep grooves may justify selective placement.
Benefits — AAPD Evidence
Sealant effectiveness has been documented in dozens of studies over the past 30 years. The Cochrane Systematic Review (2017) and AAPD policy (2024 update) report the following:
Cavity reduction: Sealed teeth show up to 80% lower cavity development. The effect is strongest during the first two years and persists at meaningful levels for 5+ years.
Long-term protection: Sealants typically remain effective for 5–10 years. Wear or loss detected at annual check-ups can be easily repaired.
Stopping early decay: If an early-stage caries lesion is limited to enamel, sealants can isolate the bacteria underneath and arrest progression.
Cost-effective prevention: A single sealant costs a fraction of the future filling, root canal, or crown that may otherwise be needed. According to AAPD, sealants are among the highest cost/benefit pediatric preventive treatments.
Reduces dental anxiety: Children who never need restorative treatment associate the dentist with positive experiences. Sealant placement is painless and reinforces this confidence.
Are Dental Sealants Safe? The BPA Concern
Sealants are recommended by the AAPD and ADA as a safe preventive measure. Parents frequently ask about BPA (bisphenol-A); here is the evidence-based context.
Some resin-based sealants contain BPA derivatives (such as BisGMA) in their formulation. A very small amount of BPA may be released briefly during placement; this amount is well below the safety thresholds set by AAPD and the EPA, and drops quickly to zero after placement.
AAPD 2024 policy: The BPA exposure from dental sealants is not clinically significant; rinsing or wiping the tooth for 30 seconds after placement reduces residual BPA further.
BPA-free options: For families who remain concerned, BPA-free resin formulations and glass ionomer sealants are now widely available. Discuss alternatives with your pediatric dentist.
Risk of sealing a cavitated tooth: If the fissure already has a cavity, decay can progress under the sealant. This is why a thorough exam by the pediatric dentist before placement is essential — a cavitated lesion is filled first, and the sealant is then considered if appropriate.
Bottom line: When properly indicated and placed by an experienced pediatric dentist, dental sealants are safe and among the most effective preventive measures available.
Dental Sealant Cost (2026)
In Turkey, sealant pricing depends on the number of teeth treated, the resin type used (resin / glass ionomer / BPA-free), the clinic's fee schedule and the city. The Turkish Dental Association (TDB) publishes a minimum-fee schedule each year; private clinics charge in line with or above this schedule.
Important note: Under regulation (Law 1219), private dental fees may not be advertised. For sealant pricing, please contact the clinic directly and request a written treatment plan after examination.
Public coverage (SGK): Public hospitals and oral-dental health centres offer sealants for children aged 6–13 under SGK in Turkey. Details should be confirmed with the nearest SGK-affiliated facility.
Private health insurance: Some pediatric policies cover preventive treatments (including sealants) partially or fully — confirm with your insurer.
Frequently Asked Questions
How long does a dental sealant last? When properly placed, sealants typically remain effective for 5–10 years. Annual check-ups detect any wear or loss for easy repair.
What if a sealant falls off? It is not an emergency, but the protected tooth becomes susceptible to decay. Visit the pediatric dentist to have it replaced.
Is sealant placement painful? No. The procedure requires no anesthesia, no drilling, and no discomfort. Children typically eat and drink immediately afterwards.
Are sealants placed on baby teeth? Not routinely. However, in high-caries-risk children (history of decay, enamel hypoplasia, special needs), sealants on primary molars may be considered. The decision is the pediatric dentist's.
When are sealants replaced? Annual check-ups identify wear, loss, or hidden decay underneath. A healthy sealant may last 5–10 years without needing replacement.
Can a sealant be placed on a cavitated tooth? No. If the fissure already has a cavity, the cavity must be filled first, and a sealant may then be considered. A pre-placement exam is essential.
Is a dental sealant the same as a dental vaccine? Colloquially called a "dental vaccine" but it is not a vaccine. Vaccines stimulate the immune system; sealants are mechanical barriers. The goal is the same: preventing cavities.
Are sealants used for infants? No. Sealants are placed on permanent molars, which begin erupting around age 6–7. Infant preventive dentistry uses different methods (fluoride application, nutrition, oral care).
Dental Sealants in Ataşehir
At our clinic in Flora Residence, sealant placement is planned when your child's molar teeth have fully erupted. The first visit assesses the eruption stage of the 6-year and 12-year molars, the fissure depth and overall oral health.
We use a rubber dam for isolation and a modern light-cured resin formulation, with the child's comfort prioritised. Multiple teeth can be sealed in a single visit — typically 4 sealants on the 6-year molars or 4 on the 12-year molars in one session.
Follow-up: First check-up at 6 months; then annual periodic check-ups. Wear or loss can be repaired in the same appointment.
If your child's 6-year molars have begun erupting, or the 12-year molars are due, you can book an appointment for a sealant assessment.
Written by
Dt. Gaye Üstüner
Pediatric Dentistry Specialist · PhD Researcher at Yeditepe University