What You Need to Know About Dental Sealants

sealant on molar

Navigating the world of dental health can often feel like deciphering a complex puzzle, especially when it comes to preventive measures that safeguard our smiles. Among these protective strategies, dental sealants stand out as a highly effective tool in the battle against tooth decay. But what exactly are dental sealants, and why are they so crucial for both children and adults alike? This blog aims to demystify dental sealants, offering a comprehensive guide for dental patients on everything from their purpose and benefits to the application process and aftercare. Whether you’re a parent considering sealants for your child or an adult wondering about the protection sealants can offer your own teeth, this article will provide you with the essential knowledge needed to make informed decisions about your oral health. Join us as we delve into the protective world of dental sealants, a simple yet powerful ally in maintaining a healthy, cavity-free smile.

What Are Dental Sealants?

Dental sealants are a thin, protective coating made from plastic or other dental materials that are applied to the chewing surfaces of the back teeth (premolars and molars). These areas are most prone to decay because they have grooves and depressions that can trap food particles and bacteria. The sealant quickly bonds into the depressions and grooves of the teeth, forming a protective shield over the enamel of each tooth. This effectively seals off the grooves, preventing the accumulation of food particles and the growth of bacteria that can lead to cavities.

There are different types of dental sealants available, each with its own set of characteristics and advantages. The choice between these types typically depends on the patient’s specific needs, the dentist’s preference, and sometimes the cost factor. Here are the main types of dental sealants:

1. Resin-Based Sealants

  • Composition: These are the most common type of sealants, made from a composite resin similar to the material used in some types of dental fillings.
  • Application: They are applied in a liquid form and harden to form a protective layer. A curing light is often used to help the sealant harden.
  • Benefits: Resin-based sealants are durable and can last several years with proper care. They bond well with the tooth surface, providing effective protection against decay.

2. Glass Ionomer Sealants

  • Composition: Made from a type of glass material, these sealants release fluoride over time, which can help strengthen the tooth enamel and further protect against decay.
  • Application: They do not require a curing light to harden as they set chemically with the tooth surface.
  • Benefits: The fluoride release is a significant advantage, offering additional protection against cavities. However, glass ionomer sealants are generally considered less durable than resin-based sealants and may need more frequent replacement.

3. Polyacid-Modified Resin Sealants (Compomers)

  • Composition: These sealants are a hybrid between resin-based and glass ionomer sealants, aiming to combine the benefits of both materials.
  • Application: Like resin-based sealants, they typically require a curing light to harden.
  • Benefits: They offer a good bond with the tooth enamel and release fluoride, though usually to a lesser extent than pure glass ionomer sealants.

4. Fluoride-Releasing Sealants

  • Composition: This category can include various types of sealants that are specifically designed to release fluoride over time.
  • Application and Benefits: While glass ionomer sealants naturally fall into this category, there are also resin-based variants designed to release fluoride. The main benefit is the additional protection against tooth decay provided by the fluoride release.

The choice of which type of dental sealant to use will depend on several factors, including the patient’s risk for tooth decay, the condition of the teeth to be sealed, and personal or professional preference. Each type has its strengths, and the dentist will consider these along with the patient’s specific needs when recommending the best option.

Benefits of Dental Sealants

Dental sealants offer a multitude of benefits, making them a popular preventive treatment in dentistry. These benefits extend beyond just the immediate impact of application, contributing significantly to long-term oral health. Here’s a closer look at the key advantages of dental sealants:

Cavity Prevention

The most notable benefit of dental sealants is their ability to prevent cavities. By filling in the grooves and depressions on the chewing surfaces of molars and premolars, sealants create a smooth surface that’s less likely to harbor food particles and plaque. This significantly reduces the risk of tooth decay. According to the American Dental Association, sealants can reduce the risk of developing cavities in molars by as much as 80%!


Compared to the cost of treating cavities, which may involve fillings, crowns, or even root canals, sealants are relatively inexpensive. They serve as a cost-effective preventive measure that can save money in the long run by avoiding more extensive and expensive dental treatments.

Easy and Pain-Free Application

The process of applying dental sealants is quick, easy, and painless. It doesn’t require drilling or removing tooth structure, making it a non-invasive treatment. This aspect is particularly beneficial for children and those who may feel anxious about dental procedures.

Long-Lasting Protection

Once applied, dental sealants can protect the teeth from decay for many years. With proper care, they can last up to 10 years, although they do need to be checked for wear and tear at regular dental visits and can be reapplied if necessary.

Promotes Oral Health in Children and Teens

Children and teenagers are often at higher risk for cavities because of inconsistent oral hygiene habits. Sealants are especially beneficial for this age group by providing additional protection during these crucial years.

Benefits for Adults

Although commonly recommended for children and teens, adults can also benefit from dental sealants, particularly if they have deep grooves in their molars and no existing decay or fillings in those teeth.

Fluoride Release (Specific Types)

Some types of dental sealants, such as glass ionomer sealants, have the added benefit of releasing fluoride over time, which can help strengthen tooth enamel and further protect against decay.

Supports Overall Health

By preventing tooth decay and oral diseases, dental sealants contribute to maintaining overall health. Poor oral health is linked to various systemic conditions, including heart disease and diabetes, so keeping the mouth healthy is beneficial for the body as a whole.

In summary, dental sealants are a proactive measure to protect oral health, offering a simple yet effective way to prevent cavities, save money on future dental treatments, and ensure a healthier mouth for both children and adults. Their easy application and long-lasting protection make them an excellent investment in dental health.

Drawbacks of Dental Sealants

While dental sealants are widely recognized for their benefits in preventing tooth decay, there are some drawbacks and considerations that patients should be aware of before opting for this preventive treatment. Here are the main drawbacks associated with dental sealants:

  • Potential for sealant failure
  • Incomplete coverage can expose teeth to decay
  • Not all dental insurance plans cover sealants
  • Not a substitute for good oral hygiene
  • Potential allergic reactions (rare)

Additionally, some sealants contain small amounts of Bisphenol A (BPA), a chemical that has raised health concerns. However, the American Dental Association (ADA) and other health organizations have stated that the low levels of BPA found in dental sealants are safe and pose no significant health risks. Nonetheless, some patients may prefer to seek BPA-free options due to personal or health concerns.

The Procedure for Applying Dental Sealants

The process of applying dental sealants is simple, quick, and painless. It involves the following steps:

  1. Cleaning the Tooth: The tooth is thoroughly cleaned to remove any food particles or plaque.
  2. Drying the Tooth: The tooth is then dried, and a cotton or another absorbent material is placed around it to keep it dry.
  3. Applying an Acid Solution: An acid solution is applied to the chewing surfaces of the tooth to roughen them up, which helps the sealant bond to the tooth.
  4. Rinsing and Drying: The acid is rinsed off, and the tooth is dried again.
  5. Applying the Sealant: The sealant is then applied to the tooth enamel, where it bonds directly to the tooth and hardens. Sometimes a special curing light is used to help the sealant harden.

Caring for Dental Sealants

Caring for dental sealants is relatively straightforward and does not require any special maintenance beyond good oral hygiene practices. Proper care can help ensure that the sealants last as long as possible and continue to protect the teeth from decay. Here are some essential tips for caring for dental sealants:

  • Maintain good oral hygiene practices, including brushing twice a day and flossing daily.
  • Avoid chewing on hard objects that could chip the sealants.
  • Visit your dentist regularly for check-ups and cleanings.
  • Eat a balanced diet and minimize sugary and acidic foods. 
  • Attend regular dental checkups so your dentist can monitor the sealant for signs of wear. 
  • Stay hydrated by drinking plenty of water
  • Avoid excessively sticky and chewy foods. 

By following these simple care instructions, dental sealants can effectively protect teeth from decay for many years.


In conclusion, dental sealants are a highly effective preventive measure against tooth decay. They are suitable for both children and adults and can provide long-lasting protection for the teeth. If you think dental sealants might be right for you or your child, consult with your dentist to discuss your options.

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