A recommendation put forth by the United States Preventive Services Task Force (USPSTF) states that fluoride varnishes should be applied to the primary teeth of all infants and children starting at the age of primary tooth eruption (typically around 2 or 3 years old) through the age of 5 years. The recommended frequency for dental fluoride varnishes of children in this age group is every 3 to 6 months, based on the child’s risk of cavities. Fluoride varnish application is easy and fast.