Fissure sealants are not strictly “necessary” for every single person, but they are one of the most effective and highly recommended preventive treatments in modern dentistry. The decision to get them is based on an individual’s specific risk of developing cavities.
For many people, especially children, they are a simple, painless, and highly effective way to prevent a lifetime of fillings and dental work.
The Problem: Why Back Teeth Are a Target for Decay
To understand why sealants are so beneficial, it helps to look at the teeth they protect: the molars and premolars.
Your back teeth are not smooth; their chewing surfaces are covered in deep grooves, pits, and fissures. These intricate “valleys” are essential for grinding food, but they are also a perfect trap for food particles and plaque bacteria.
Even with excellent brushing, toothbrush bristles are often too wide to reach the bottom of these narrow grooves. This creates an ideal environment for bacteria to sit and multiply, eventually causing decay. In fact, studies show that the vast majority of cavities in children and teens—some estimates say up to 90%—occur in these pits and fissures.
The Solution: How a Fissure Sealant Works
A fissure sealant is a protective plastic coating that acts as a physical barrier, “sealing off” the deep grooves.
The process is quick, painless, and non-invasive, with no drilling or anaesthetic required.
- Clean: The tooth is thoroughly cleaned.
- Prepare: A special solution is applied to gently roughen the tooth surface so the sealant will bond.
- Paint: The liquid sealant material is painted onto the tooth, flowing into all the pits and fissures.
- Set: A blue light is used to harden the sealant, creating a durable, protective shield.
This new, smooth surface is now easy to clean with a toothbrush and, most importantly, is completely sealed off from food and bacteria.
Who Needs Sealants? (It’s All About Risk)
The need for sealants is determined by your dentist based on your individual caries risk, not just your age.
- Children and Teenagers (Primary Candidates): This is the most common and effective time to apply sealants. The first permanent molars erupt around age 6-7, and the second molars follow around age 11-14. Applying sealants as soon as these teeth appear provides immediate protection during the most cavity-prone years. Studies have shown that children with sealants experience significantly less decay than those without.
- Adults: Sealants are not just for kids. Adults can be excellent candidates, especially if they have deep fissures that have not yet decayed, or if they have a history of cavities.
- Who Might Not Need Them? If you have naturally shallow, “self-cleaning” grooves and a low risk of decay, your dentist may decide that sealants are not necessary.
The Most Important Thing to Remember
A fissure sealant is a powerful tool, but it is not a replacement for good oral hygiene.
Sealants only protect the biting surface of the tooth. They do not prevent decay on the smooth sides of a tooth or in between the teeth. You must continue to practice a consistent dental care routine, including proper brushing, flossing, and maintaining a healthy diet.
A sealant is like a custom-fit raincoat for your tooth—it provides excellent protection, but you still need to take care of the rest of your health.
The Verdict
So, are fissure sealants necessary? If you or your child has deep grooves in your back teeth, they are one of the most effective, painless, and affordable ways to prevent tooth decay.
The decision is best made after an examination. At your next check-up, ask our team at Kennett Road Dental Practice to assess your teeth and discuss whether sealants are a good choice for you or your family.
