I’ve read multiple journals on this subject, and I can’t seem to find a logical explanation as to why they substitute calcium fluoride for sodium fluoride. Matter of fact, all the research i’ve read highlights dangers with the use of the sodium fluoride version including reductions in intelligence (in mice ).
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So, tooth decay happens when bacteria in your mouth eat sugars and excrete acids. Those acids break down the enamel that protects our teeth. While our mouths have a natural process to help remineralize our teeth, our high sugar/carb diets provide extra sugars in the mouth, leading to extra bacteria, leading to more acid. That is why tooth decay is problem in our society and not a problem in societies not as reliant on grains as a staple food.
Sodium fluoride helps produce a compound – fluorapatite – that is more resistant to acids than what we would normally produce. When this compound is used in remineralization, the result is stronger, more resistant enamel than we would otherwise make.
The dangers of sodium fluoride are basically non-existent in the quantities present in municiple water supplies. The studies you have seen are when mice are exposed to fluoride levels hundreds or thousands of times higher than what you are exposed to. As is always the case with poisons, it isn’t the substance – it is the dose.
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