Synedent FLX has all of the benefits of Synedent, but includes Prisyna’s gentle fluoride delivery technology to help prevent cavities. In the mouth, fluoride at low levels in saliva reduces the rate at which tooth enamel demineralizes and increases the rate at which it remineralizes in the early stages of cavities, thus benefiting tooth surfaces (enamel and cementum). Synedent FLX can help protect teeth against acids produced by plaque bacteria with regular use following brushing and flossing.