Fluoride is a naturally occurring element, which has shown to prevent tooth decay by as much as 50-70%, Despite the advantages, too little or too much fluoride can be detrimental to the teeth. With little or no fluoride, the teeth aren’t strengthened to help them resist cavities. Excessive fluoride ingestion by young children can lead to dental fluorosis, which is typically a chalky white discoloration (brown in advanced cases) of the permanent teeth. Be sure to follow your dentist’s instructions on suggested fluoride use and possible supplements, if needed.
You can help by using a fluoride toothpaste and only a smear of toothpaste (the size of a grain of rice) to brush the teeth of a child less than 3 years of age. For children 3 to 6 years old, use a "pea-size" amount of toothpaste and perform or assist your child’s toothbrushing. Remember that young children do not have the ability to brush their teeth effectively on their own. Children should spit out and not swallow excess toothpaste after brushing, in order to avoid fluorosis.