The simplest cavity prevention for back teeth. Applied once, protective for years.
Dental Sealants: Quick Answer
Dental sealants are thin plastic coatings applied to the deep pits and fissures of back teeth — mainly permanent molars — to prevent cavities. The grooves on molar chewing surfaces are too narrow for toothbrush bristles to clean, making them the most common sites for decay in children. A sealant fills these grooves, creating a smooth surface hostile to bacteria. Applied in a single 15-minute visit with no drilling or anaesthesia, sealants are one of the most evidence-backed preventive interventions in pediatric dentistry.
Key facts
Dental sealants are thin plastic coatings (usually resin or glass ionomer) applied to the deep pits and fissures of back teeth — mainly first and second permanent molars. The pits on these surfaces are too narrow for toothbrush bristles to clean, making them the most common sites for cavities. A sealant fills these grooves, creating a smooth surface that is easy to clean and hostile to acid-producing bacteria. Applied in a single 15-minute visit, a well-placed sealant can prevent up to 80% of cavities in back teeth for 2–4 years, and can be reapplied when it wears down.
Molar fissures are a structural vulnerability, not a hygiene failure. No amount of careful brushing can clean a groove that is narrower than a toothbrush bristle. These fissures trap food and bacteria, creating a low-oxygen environment where Streptococcus mutans — the primary cavity-causing bacterium — thrives. Sealants were developed specifically to eliminate this structural risk. The Cochrane systematic review and the CDC Community Preventive Services Task Force both endorse sealants as one of the most cost-effective preventive interventions available for school-age children.
Sealants are most effective when applied soon after a molar erupts fully into the mouth — before any decay has a chance to begin. The first permanent molars erupt around age 6–7, and the second permanent molars erupt around age 11–13. These are the two ideal windows. Children with deep fissures, a history of decay in other teeth, or dietary habits high in sugar are especially good candidates. Primary (baby) molars can also be sealed in children at high decay risk, though this is less commonly done.
Pits and Fissures
Deep grooves and crevices on the chewing surfaces of back teeth. Naturally narrow — often less than 0.1mm — meaning toothbrush bristles cannot reach the base. These are the sites where the vast majority of childhood cavities originate. The depth and complexity of fissures varies between children and can be assessed visually by a dentist.
Resin Sealant
The most common type. Bonds to etched enamel, flows into pits, and cures under a UV light. Clear or tooth-colored. Lasts 2–5 years with monitoring. Provides the most durable seal and the highest level of fissure penetration when applied correctly. Requires a completely dry tooth surface — moisture contamination is the primary cause of premature failure.
Glass Ionomer Sealant (GIS)
Preferred for newly erupted teeth or children with high decay risk. Releases fluoride continuously, providing an additional layer of protection beyond physical barrier. Easier to apply in a moist field — useful when a child has difficulty cooperating for isolation. Shorter lifespan than resin sealants but highly effective in the critical early post-eruption period.
Acid Etching
The enamel surface is conditioned with dilute phosphoric acid (30–37%) before resin sealant application. This creates a microscopically rough surface for micromechanical bonding — the sealant flows into these micro-porosities and locks in place when cured. Etching is skipped when glass ionomer sealants are used, as GIS bonds chemically to enamel without this step.
First Permanent Molar
Erupts around age 6–7 (commonly called the '6-year molar'). Often the first tooth to receive a sealant. Timing is critical — sealants should be applied as soon as the tooth is fully erupted to prevent early decay. This tooth is frequently missed by parents and children because it erupts behind the baby teeth and may not be noticed until a dentist points it out.
The entire sealant procedure takes 15–30 minutes and requires no injections, no drilling, and no recovery time.
⏱ 15–30 minutes per sealant session; typically 2–4 teeth sealed in one visitThe dentist examines all molar teeth to identify which are candidates for sealing — based on eruption status, fissure depth, and whether any early decay is already present. Eligible tooth surfaces are cleaned with a prophy paste and rinsed thoroughly to remove biofilm and debris from the fissures before any bonding step.
Ask your dentist to check the first permanent molars at every visit starting around your child's 6th birthday. These teeth often erupt without parents noticing, and early sealing gives the best protection.
The tooth is isolated using cotton rolls or a rubber dam, and thoroughly dried with an air syringe. This step is the most critical determinant of sealant longevity. Any moisture contamination — from saliva, breath, or blood — will prevent the resin from bonding properly to the etched enamel, leading to early detachment. A cooperative child and an experienced pediatric dentist make this step much easier.
Moisture contamination is the most common cause of sealant failure. If your child is very young or anxious, discuss whether glass ionomer sealant (which tolerates slight moisture) is more appropriate.
For resin sealants: a phosphoric acid gel (30–37%) is applied to the chewing surface for 15–30 seconds, then rinsed off thoroughly with water for at least 10 seconds. The tooth is dried again. When adequately etched, the surface appears chalky or frosty white — this indicates the enamel has been microscopically roughened for bonding. This step is skipped entirely when glass ionomer sealant is used.
Resin sealant is flowed into the pits and fissures using a small brush applicator, taking care to cover all grooves without creating excess bulk on the cusps. A curing light (wavelength approximately 470nm) is held over the sealant for 20–40 seconds to polymerize the resin. Glass ionomer sealants do not require a curing light — they self-harden on contact with moisture. The sealant should penetrate deep into the fissure, not just coat the surface.
The child bites on articulating paper to check for any high spots created by the sealant. Any excess material is polished down with a finishing bur to ensure the sealant does not alter the bite. The sealant is inspected visually and with a dental explorer to confirm complete coverage of all fissures and good marginal integrity. The child can eat and drink normally immediately after.
Sealants should be checked at every routine visit. They can partially detach or wear down — especially over the first year. Re-sealing a partially lost sealant is quick and inexpensive, and far cheaper than treating a cavity.
Most children need sealants on 4 teeth (first and second permanent molars on both sides), so total cost is typically ₹2,000–₹6,000. Some clinics offer packages for sealing all four molars at a reduced per-tooth rate.
Based on Capcane's 2026 review of pediatric dental clinic pricing across Bangalore.
How much do dental sealants cost per tooth in Bangalore by material type?
| Sealant type | Fluoride release | Lifespan | Cost per tooth |
|---|---|---|---|
| Resin Sealant | No | 3–5 years (with monitoring) | ₹500–₹1,000 |
| Glass Ionomer Sealant | Yes — continuous | 1–3 years | ₹600–₹1,200 |
| Resin-Modified GIS | Yes — sustained | 2–4 years | ₹800–₹1,500 |
Dentist qualification and clinic type
A pediatric dental specialist (MDS Pedodontics) typically charges more than a general dentist. For young or anxious children, a pediatric specialist's experience with behaviour management is often worth the premium — a well-applied sealant on a cooperative child lasts significantly longer.
Material used
Resin sealants use higher-cost materials and require a curing light, slightly increasing cost. Resin-modified glass ionomer sealants combine fluoride release with better durability, and tend to cost the most. Standard GIS is the most affordable option.
Number of teeth sealed
Most clinics charge per tooth. When sealing all four molars in a single visit, ask whether a package price is available — this is common in pediatric dental practices and can reduce total cost by 10–20%.
Inclusions and follow-up
Confirm whether the quoted price includes the initial check-up, the sealant material, curing, and a follow-up check at 6 months. Some clinics charge for each component separately.
Red flags — watch out for these
Sealants are one of the most evidence-backed preventive treatments in pediatric dentistry — but like any treatment, they are sometimes recommended when unnecessary, and sometimes not recommended when they would be genuinely beneficial. Here is what parents need to know.
Signs you genuinely need it
Signs you might not need it
Capcane's position
We assess your child's specific fissure anatomy and cavity risk profile before recommending sealants. We do not recommend sealants for every child automatically. Share your child's dental photographs and history — we will tell you honestly which teeth genuinely need sealing and which do not.
Share your child's dental photos and history
WhatsApp us photographs of your child's back teeth (chewing surfaces) and tell us their age, cavity history, and brushing habits. If you have any recent dental X-rays, include those as well.
Pediatric dentist review within 24 hours
A pediatric dental specialist reviews your child's risk profile — fissure depth, eruption status, decay history — and advises whether sealants are genuinely indicated and for which specific teeth. We do not recommend sealants as a blanket recommendation.
Matched with a verified pediatric dentist
We connect you with an MDS-qualified pediatric dentist with experience in child behaviour management. A child who is well-managed during the procedure cooperates better, allowing proper isolation and a sealant that lasts significantly longer.
Real outcomes from real patients.
Kavitha R.
“My son had already gotten two cavities in his baby teeth, so I was worried about his permanent molars. Capcane's pediatric dentist checked his first molars — they had very deep grooves — and recommended sealing all four. Two years later, zero cavities on those teeth. His classmates who didn't get sealants have had fillings. The ₹3,200 was absolutely worth it.”
Anand S.
“Our local dentist wanted to seal all 8 molars including the baby teeth for our 5-year-old. I came to Capcane for a second opinion. Their pediatric dentist looked at the photos and explained that our daughter's fissures were actually quite shallow and she was low risk — sealing primary teeth was not necessary for her. Saved us ₹4,000 and unnecessary intervention. I trust them because they told me not to spend money.”
Get a free, honest second opinion — no commitment, no hidden fees.