Sealants

Sealants have gotten some bad press lately with a link to BPA. BPA, or bisphenol A, is a chemical in some plastics. Human and animal studies have linked BPA to an estrogen like chemical that can increase the risk of diabetes and heart disease in adults.
Minute BPA levels rise in the saliva in the first three hours after sealent placement and then quickly drop off. The benefits of sealants outweigh the potential risk of BPA exposure.
Sealants are a thin plastic covering placed on the grooves of the posterior chewing teeth or molars. Sealants prevent decay on the chewing surfaces by covering the skinny, narrow, cracks and crevices referred to in dentistry as "pits and fissures". This lessens the hiding places for the bacteria that cause cavities or "caries" and makes the back teeth more cleansible.
Dental materials cause far less BPA exposure then normal, daily, used consumer products such as plastic bottles and the linings of metal cans.