What Are Dental Sealants?
Dental sealants are a thin plastic resin applied to the chewing surfaces of the back teeth (molars). Molars have tiny grooves where bacteria can hide, even with good brushing.
Sealants fill in those grooves so bacteria cannot get trapped and cause cavities. They are a simple, preventive step that can protect teeth for years.
Who Should Get Sealants?
Sealants are most common for children because cavities often start in the grooves of the back teeth. The key age is around 6, when the first permanent molars come in and are meant to last a lifetime.
Many insurance plans cover sealants from about age 6 through the teen years (sometimes up to 21, depending on the plan). Adults can also choose sealants if they’re at higher cavity risk, though coverage may vary.
How Long Do Sealants Last?
Sealants usually last 3 to 8 years, and sometimes longer. If a sealant wears down or comes off (sticky foods can do this), it can often be touched up easily.
Routine dental visits matter because a dental professional can check sealants and repair them if needed.
What Happens During a Sealant Visit?
Sealants may be done at the same visit as a cleaning, depending on time. The process is quick and comfortable. During the application, the dental team will:
- Clean the tooth thoroughly with a small brush and a mildly gritty cleaner
- Apply the sealant material to the grooves
- Use a curing light to harden it so it bonds to the tooth
The process takes about 15 minutes and can seal four to eight teeth.
Caring for Teeth After Sealants
Sealants protect the grooves in molars, but they don’t replace daily brushing and flossing. Keeping up with good home care helps prevent cavities on other tooth surfaces.
Are Sealants Safe?
Yes. Dental sealants are considered very safe and can be applied as many times as needed.
Sealants vs. Fluoride
Sealants and fluoride both prevent cavities, but they work differently:
- Fluoride strengthens the tooth surface
- Sealants act like a protective coating that blocks bacteria from the grooves
For many patients, using both offers stronger protection.
What If a Tooth Already Has a Cavity?
If decay is already present, that tooth usually needs a filling first. Even if one tooth cannot be sealed, other healthy molars may still benefit from sealants.
Dental sealants are a simple, effective way to prevent cavities—especially for children as their permanent molars come in. Valley Health dental teams can help you decide when sealants make sense and monitor them over time during routine visits.