Experts say that dental cleaning practices do not comply with the recommendations.
Centers for Disease Control published a study on Friday with data on about 5,000 children aged 3 to 15 years.
They found that almost 80 percent of the parents did not have enough teeth for their teeth in time.
Healthcare professionals say that cleaning should begin when the child receives the first tooth.
The CDC also found that about one-third of the children only coagulate their teeth once a day, rather than twice a day.
According to the study, almost 40 percent also used too much toothpaste.
To prevent children from accidentally swallowing too much toothpaste, it is recommended to use a pea size.
Experts say no later than their first birthday when children first go to the dentist.