Can dental sealants expose your child to BPA?

What's actually in it

Dental sealants are thin plastic coatings applied to children's back teeth to prevent cavities. Most are made from bis-GMA resin, which is derived from BPA. When the sealant is applied and as it wears down over time, BPA is released into the mouth, swallowed with saliva, and absorbed into the bloodstream.

The sealant sits in the mouth 24/7, constantly exposed to saliva, food, and chewing forces that accelerate BPA release.

What the research says

A 2026 prospective cohort study in JDR Clin Trans Res measured BPA levels in schoolchildren before and after dental sealant placement. They tracked blood levels over time to see how much BPA entered the body.

BPA blood levels rose sharply within hours of sealant placement. The spike was highest in the first 24 hours but remained elevated above baseline for at least one week.

The amount of BPA released depended on the type and brand of sealant used. Some brands released more than others, but all caused measurable increases in blood BPA.

Sealants still prevent cavities effectively. But asking your dentist about BPA-free sealant options or glass ionomer alternatives can reduce your child's exposure while still protecting their teeth.