Small children have either baby teeth, covered in a thin layer of enamel, or permanent teeth that have just emerged. That makes them extremely prone to decay. Through a series of fluoride treatments, their teeth can therefore become more resistant to decay for life.
Children should normally have fluoride varnish applied to their teeth at the age of 3, after all their baby teeth have emerged. The fluoride used in dental offices, as well as in fluorinated toothpaste, is entirely harmless. We should, however, follow our dentist’s orders when it comes to the amount and the type of fluoride we will be using.