Final answer:
Naccache's research indicates that the ingestion of fluoride from dentifrices in children primarily depends on the amount of dentifrice on the toothbrush, the child's age, and post-brushing rinsing habits. Understanding these factors is crucial as fluoride is important for dental health but can pose risks if ingested in excessive amounts.
Step-by-step explanation:
The statement points towards factors affecting the ingestion of fluoride from dentifrices in children. According to Naccache's findings, the most significant factors determining the amount of fluoride ingested are the amount of dentifrices applied to the toothbrush, the age of the child, and the post-brushing rinsing habits. All these factors contribute to the exposure a child has to fluoride, which, while important for dental health, can be detrimental at excessive levels. Dentifrices in various forms, like toothpaste, contain fluoride which aids in the remission of tooth decay and strengthening of the enamel. However, care must be taken in administering the correct quantity to avoid the adverse effects of swallowing too much fluoride, especially in younger children who have not yet fully developed their swallowing reflexes to efficiently spit out toothpaste.
Fluoride has a significant role in dental health by forming fluorapatite, which is more resistant to acid attack and thus protects the teeth. While fluoride is an active ingredient in the toothpaste to prevent cavities, its concentration needs to be monitored, especially in young children.