Most cavities in school-age children form in the same place. The chewing surface of the permanent molars. These teeth come in around age 6 (the “6-year molars”) and again around age 12 (the “12-year molars”). They have deep grooves and pits on their biting surface that no toothbrush can fully reach. Food gets stuck. Plaque builds up. Cavities form, often quietly, and often deep into the tooth before they become visible.
Dental sealants are a thin protective coating placed in those grooves to physically block food and bacteria from settling. The procedure takes about 10 minutes per tooth. It is painless. It involves no drilling and no anaesthesia. Studies consistently show that sealants reduce cavities on the treated surface by up to 80 percent, and the benefit holds for several years per application.
Sealants have been a standard preventive intervention in most developed countries for decades. In India, they are still under-used. Many of the parents we see have never had sealants offered to them before. This article explains what they are, who should consider them, and why this conversation often does not happen at a routine check-up.
What dental sealants are
A sealant is a tooth-coloured (or sometimes clear) resin material that is bonded to the chewing surface of a back tooth. It flows into the deep grooves, fills them, and hardens into a smooth surface that is easy to clean.
There are two main types:
Resin-based sealants. The most common type. Excellent retention, very durable. Requires a dry working field, which can be challenging for young or uncooperative children.
Glass-ionomer sealants. More forgiving of moisture, slightly less durable. Often used as an intermediate option when full isolation is difficult, with a plan to replace with resin later.
Both are biocompatible, well-tolerated, and have an excellent safety profile. Sealant materials have been studied extensively over decades. The trace BPA concerns that circulated 10 years ago have been thoroughly investigated and current materials are considered safe.
When sealants should be done
The ideal timing tracks the eruption of the permanent molars:
Age 6 to 7: As soon as the first permanent molars (6-year molars) are fully erupted and the chewing surface is fully visible above the gum line. Best done within 6 to 12 months of eruption, before the first cavity has a chance to form.
Age 12 to 13: When the second permanent molars (12-year molars) erupt. Same protocol, same timing.
Premolars (around age 10 to 12): Sometimes sealed if the grooves are particularly deep or if the child has a history of cavities.
The window matters. A sealant placed on a fresh tooth with no decay is a clean, simple procedure. A sealant placed on a tooth that already has an early cavity becomes more complex. The cavity must be addressed first, often by a small filling, before the sealant goes on.
Catching the right window means a check-up at age 6 to 7 and again at age 12 to 13 specifically for sealant assessment. We flag this for parents at the relevant visit.
Who benefits most from sealants
All children with permanent molars benefit. The benefit is largest for:
Children with deep grooves on their molars. Some kids have anatomically deeper pits and fissures. We can see this clinically. The risk of cavities in these teeth is significantly higher.
Children with a history of cavities in baby teeth. If your child had multiple cavities in their milk teeth, they are at higher risk for cavities in their permanent teeth. Sealants reduce that risk meaningfully.
Children with brace appliances or planning to start orthodontic treatment. Sealants protect the molars during the harder-to-clean orthodontic phase.
Children with special needs. Where brushing thoroughness is limited and cavity risk is higher.
Children with high-sugar diets, which is many Indian children. No judgement. Sweets are part of celebrations, festivals, family routines. The dietary risk is real and sealants help offset it.
A child with low-risk teeth (shallow grooves, no prior decay, careful brushing) may not need sealants. We assess this on a per-tooth basis. Sometimes we recommend sealants on the lower molars but not the uppers, depending on the anatomy.
What the procedure looks like
The procedure is straightforward and child-friendly.
- The tooth is cleaned with a small brush and paste, then rinsed.
- The tooth is isolated with cotton rolls to keep it dry. (For more challenging cases, a rubber dam is used.)
- A mild conditioning gel is applied for 15 seconds to roughen the enamel slightly, then rinsed.
- The sealant material is brushed onto the chewing surface and into the grooves.
- A small blue light hardens the material in about 20 seconds.
- The bite is checked to make sure the sealant is not too thick.
Per tooth: about 5 to 10 minutes. For all four 6-year molars: about 30 to 40 minutes in one visit. The child is awake, comfortable, no needles, no drill. Most children find it the easiest procedure they have ever had.
How long sealants last
A well-placed sealant typically lasts 3 to 7 years before needing to be checked or touched up. Some sealants last over 10 years. The retention rate at 5 years is high, but not 100 percent. Small chips or partial loss can happen, especially in children who eat sticky foods or chew ice.
We check sealants at every routine 6-monthly visit and touch up or replace as needed. A repair is usually quicker than the original placement.
Why most Indian parents have not been offered sealants
A few honest reasons:
Many general dentists do not focus on preventive pediatric care. The training emphasis in India is still skewed toward treating disease rather than preventing it. Sealants are a preventive intervention. The clinical case for them has grown stronger over time but the practice habits have not fully caught up.
The economic model. A sealant is a small, fixed-cost procedure. A filling six months later is a larger fee. There is a quiet incentive in fee-for-service dentistry to not catch cavities early. We do not work that way. We recommend sealants when they are indicated, and we say so when they are not.
Lack of awareness among parents. Most parents have never heard of sealants. The procedure is not in the cultural conversation about kids’ dental care the way fluoride or braces are. We see educating parents as part of our job.
Common questions Hyderabad parents ask
“My child has no cavities. Does she need sealants?” That is exactly when sealants work best. The aim is to seal the grooves before any decay starts. Waiting for the first cavity defeats the purpose.
“Does it hurt?” No. There is no drilling, no needles, no removal of tooth structure. The cleaning gel may taste slightly sour. That is all.
“How much does it cost?” Please contact our reception for current pricing. Sealants are charged per tooth. The combined cost for all four 6-year molars is meaningfully less than the cost of treating one cavity in the same tooth a year later.
“Will my child’s teeth still feel normal?” Yes. The sealant is very thin and the bite is checked before the visit ends. Most kids do not notice it after a few hours.
“My pediatrician said sealants are not necessary. Who is right?” This is a respectful disagreement we see sometimes. The evidence base for sealants in cavity prevention is strong (multiple Cochrane reviews, large meta-analyses, decades of clinical data). Pediatricians often see oral health as outside their primary scope. The recommendation for sealants is a dental decision based on the specific child’s risk profile.
Booking a sealant assessment at ToothMatters Jr.
If your child is between 6 and 13 and has had a check-up in the past year, you can ask specifically about sealant suitability at your next visit. If you have not had a check-up recently, book one. We will assess the molars and recommend sealants only if they will genuinely benefit your child. WhatsApp the clinic with your child’s age and any history of cavities.
This article is for general information and is not a substitute for personalised medical advice. Every child is different. Please consult Dr. Sravanthi or your pediatric dentist for guidance specific to your child.