Lịch sử “gây tranh cãi” xung quanh việc thêm nguyên tố florua vào nước máy

Florua là một nguyên tố tự nhiên đã được thêm vào nước máy ở một số vùng của Mỹ từ những năm 1940. Nguyên tố này được Hiệp hội Nha khoa Mỹ, Viện Hàn lâm Nhi khoa Mỹ và Hiệp hội Nha khoa Canada ủng hộ vì hiệu quả ngăn ngừa sâu răng.

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