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90% Reduction: Scientists Discover Natural Molecule That Eradicates Plaques and Cavities
(scitechdaily.com)
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My wife works in dental insurance so I asked her. She said for the general public, the effectiveness of the sealant decreases as the client ages, because an adult's tooth is more smooth than a child's. So there's a critical age where the cons outweighs the pros.
If you think that the entire dental industry is fully prepared and willing to negate billions of dollars in profit per year but the porosity of adult teeth has simply tied their hands... I've got a couple bridges to sell you.
I am 38 and have so far had no cavity. Turns out adults have a very easy handle on dental hygiene, brushing your teeth, flossing and avoiding candy and sweet drinks