"Analysis of data 2013-2016 shows that more than 38 per cent of three to six-year-olds use more toothpaste than recommended by the CDC and other professional organizations," said the report published on Friday.
The recommended recommended toothpaste for children aged three to six years old, while the under three should use smear of grain grain, according to the report.
Meanwhile, the CDC noted that almost 80 per cent of 3 to 15-year-olds started to brush later than the recommended six-month age.
Fluoride use could help to avoid tooth decay, but the CDC recommended that children begin to use fluoride toothpaste in two years, to prevent excessive fluoride too much and the potential risk of dental fluorosis.
The CDC suggested that parents and carers ensure that children brush their teeth quite often with the recommended amount of toothpaste. Healthcare professionals and organizations could also help by providing enough education.