Dental Sealants: Cavity Prevention for Groovy Teeth One of the dental treatments that prevent tooth decay is Dental Sealant. Sealants are a low cost non-invasive technique for preventing cavities in children's teeth. Dental sealants are usually placed on the surface of the back teeth (molars) because they are the ones that suffer the most damage. For more information, visit www.toothtowngreeley.com. in Public bookmarkswith dental-sealantsby 2 users