In most instances the regular use of a fluoride-containing toothpaste is the only topical application that children need up to 3 years of age.
Because children under 4 years of age cannot effectively expectorate,
care must be taken to minimize the amount of toothpaste that is used and swallowed.
Generally children under 2 years of age should not use toothpaste
or use only a scant smear on the brush.
Children over 2 years of age should have a pea-size amount placed on the brush,
and parents should supervise the brushing session so that the dentifrice and saliva are expectorated.