The AAP now recommends fluoride varnish treatments to help prevent tooth decay or to slow down the progression of existing decay. Fluoride varnish cannot completely prevent cavities. Brushing regularly, getting regular dental care, and eating a healthy diet will also reduce tooth decay. We will be applying fluoride varnish to your child's teeth at your 12 month, 18 month and 2 year well visits. If your child is already seeing a dentist, fluoride varnish can be applied in a dental office instead.