Dental fluorosis is primarily caused by what factor during tooth development?

Dental fluorosis is primarily caused by high concentrations of fluoride intake during the critical period of tooth development. This condition arises when children consume an excessive amount of fluoride while their teeth are still forming, usually from birth to about age six. During this stage, the developing enamel is sensitive to high levels of fluoride, which can disrupt the normal formation of enamel and lead to the characteristic white spots or streaks associated with fluorosis.

High fluoride exposure can come from various sources such as excessive ingestion of fluoride toothpaste, fluoride supplements, or high-fluoride drinking water. In moderation, fluoride is beneficial for dental health, as it helps to strengthen enamel and prevent cavities. However, when intake exceeds safe levels, it can cause the discolored enamel associated with fluorosis, emphasizing the importance of monitoring fluoride exposure in young children.