Dental sealants are a preventive treatment that can protect permanent teeth from tooth decay and cavities. According to the American Dental Association (ADA), children between the ages of six to 14 years of age should receive dental sealants. Dental sealants can help protect teeth from decay for up to 10 years, and they prevent 80 percent of cavities in molars. However, not all children need dental sealants, and some may not be suitable for them.