Fluoride varnish
It is applied to the teeth in less than a minute, quietly and without anaesthesia. Systematic reviews attribute a reduction in cavities of around 40 % to it—with wide intervals: it is a useful measure, not a shield. It is applied from two to four times a year depending on the risk of each child, and then neither eating nor drinking for half an hour. A safety note that almost nobody mentions: fluorinated gels and mouthwashes are not used in children under six due to the risk of swallowing them — the varnish is.


