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Referring to a common salt of fluoride, sodium fluoride (NaF), the lethal dose for most adult humans is estimated at 5 to 10 g (which is equivalent to 32 to 64 mg elemental fluoride/kg body weight). [ 2 ] [ 3 ] [ 4 ] Ingestion of fluoride can produce gastrointestinal discomfort at doses at least 15 to 20 times lower (0.2–0.3 mg/kg or 10 to 15 ...
Though using fluoride-free toothpaste isn’t dangerous, Dr. Bonnaig says it does make getting cavities more likely since you’ll be missing out on an ingredient that strengthens and protects teeth.
The fluoride enhances the strength of teeth by the formation of fluorapatite, a naturally occurring component of tooth enamel. [ 9 ] [ 10 ] [ 11 ] Although sodium fluoride is used to fluoridate water and is the standard by which other water-fluoridation compounds are gauged, hexafluorosilicic acid (H 2 SiF 6 ) and its salt sodium ...
By comparison, fluoride toothpaste costs an estimated $11–$22 per person-year, with the incremental cost being zero for people who already brush their teeth for other reasons; and dental cleaning and application of fluoride varnish or gel costs an estimated $121 per person-year.
In 2015, the U.S. Public Health Service, under the Department of Health and Human Services, set the optimal level of fluoride in water at 0.7 milligrams per liter — a level that, after decades ...
This can lower the anti-cavity re-mineralization and antibacterial effects of fluoride. [5] [6] [7] Fluoridated mouthwash may mitigate this effect or in high concentrations increase available fluoride, but is not as cost-effective as leaving the fluoride toothpaste on the teeth after brushing. [5]
In any case, it is only the fluoride that is directly present in the mouth (topical treatment) that prevents cavities; fluoride ions that are swallowed do not benefit the teeth. [ 3 ] Water fluoridation is the controlled addition of fluoride to a public water supply in an effort to reduce tooth decay in people who drink the water. [ 4 ]
Fluoride has been added to public water supplies in the U.S. for decades. No studies in the U.S. have flagged any measurable decreases in children's cognitive development since fluoride was ...