Cavities are one of the most common dental issues, affecting people of all ages. To prevent tooth decay, dentists often recommend dental sealants—a protective coating applied to the chewing surfaces of molars. But what are dental sealants made of, and how do they work? Understanding their composition helps patients make informed decisions about their oral health. In this blog, we’ll explore the materials used in sealants, their effectiveness, and their safety.

Read More: Dental Sealants Pros and Cons: What You Should Know

I. What Are Dental Sealants Made Of?

Dental sealant material is specifically designed to create a protective barrier against plaque and bacteria. There are two primary types of sealant material used in modern dentistry:

Resin-Based Sealants – Made from a plastic-based composite resin, these are the most commonly used.

Glass Ionomer Sealants – A fluoride-releasing alternative often recommended for high-risk patients.

Each type offers unique benefits, and your dentist can help determine the best option based on your needs.

II. Types of Dental Sealant Materials

a. Resin-Based Sealants

Resin-based sealants are widely used due to their durability and strong adhesion. They are typically made of:

• Bisphenol A-Glycidyl Methacrylate (Bis-GMA) or Urethane Dimethacrylate (UDMA) – These compounds create a durable plastic that bonds effectively to the enamel.
• Filler Particles – Strengthen the sealant and improve wear resistance.
• Photoinitiators – Activate the hardening process when exposed to light.

Many patients express concerns about BPA exposure from sealant material, but studies confirm that BPA levels in dental sealants are minimal and well within safe limits set by health authorities.

Read More: How Long Do Sealants Last & What Affects Their Durability?

b. Glass Ionomer Sealants

Glass ionomer sealants differ from resin-based alternatives in composition and function:

• Fluoroaluminosilicate Glass – A combination of glass powder and polyacrylic acid.
• Fluoride Release – Strengthens the enamel and reduces the risk of decay.
• Chemical Bonding – Unlike resin sealants, they chemically bond to the tooth structure without requiring light curing.

While glass ionomer sealants are not as long-lasting as resin-based options, their ability to release fluoride makes them ideal for patients at a higher risk of cavities.

Read More: Dental Sealant Basics: A Preventive Measure Against Cavities

III. Safety and Effectiveness of Dental Sealants

Research supports the safety and effectiveness of dental sealant material. The American Dental Association (ADA) and the U.S. Centers for Disease Control and Prevention (CDC) endorse dental sealants as a preventive measure against cavities. Studies show that sealants can reduce the risk of tooth decay by up to 80% in molars.

Concerns about BPA in resin-based sealants are often raised, but the actual exposure from sealants is minimal—far lower than BPA exposure from everyday items like food containers. Glass ionomer sealants, on the other hand, contain no BPA at all.

Read More: Cavity vs Filling – What Your Teeth Are Trying to Tell You!

IV. Who Should Get Dental Sealants?

Dental sealants are beneficial for:

1. Children and Teenagers – Since cavities often develop in newly erupted permanent molars, applying sealants early can prevent decay.

2. High-Risk Adults – Those prone to cavities due to deep grooves in their teeth or poor oral hygiene habits.

3. Patients with Orthodontic Braces – Helps protect hard-to-reach areas from plaque buildup.

If you’re unsure whether sealants are right for you or your child, a consultation with a trusted dentist can help determine the best approach.

Read More: Post-Sealant Care: How Long After Sealants Can You Eat

Start Your Journey to a Radiant Smile with SmileStudio!

Dental sealants are an effective way to prevent cavities, especially in children and teenagers. By understanding what are dental sealants made of, you can make informed choices for better oral health. Whether you opt for resin-based or glass ionomer sealant material, both provide strong protection against decay.

At SmileStudio, we prioritize your smile with high-quality dental sealant material and expert care. Don’t wait—book your appointment today and take the first step toward a healthier, brighter smile! 

Call us at +1 (617) 265-5606 or visit SmileStudioBoston.com to schedule your visit.

FAQs

1. What are dental sealants made of?

Dental sealants are made of either resin-based composite materials (like Bis-GMA or UDMA) or glass ionomer cement, both of which provide a protective barrier against cavities.

2. Are dental sealants safe?

Yes, dental sealants are FDA-approved and widely recommended by dentists. BPA exposure from resin-based sealants is extremely low and considered safe.

3. How long do dental sealants last?

Resin-based sealants can last up to 10 years with proper care, while glass ionomer sealants may require more frequent reapplication.

4. Can adults get dental sealants?

Yes, adults who are prone to cavities or have deep grooves in their molars can benefit from dental sealants.

5. Do sealants replace the need for fluoride?

No, sealants work alongside fluoride treatments to provide maximum protection against tooth decay.