Nobody looks forward to having a cavity drilled and filled by a dentist. Now there’s an alternative solution: an antimicrobial liquid that may be brushed on cavities to prevent tooth decay – painlessly. The liquid is named silver diamine fluoride, or S.D.F. It’s been useful for decades in Japan, but it’s been for sale in the us, beneath the brand Advantage Arrest, for just about annually. The meals and Drug Administration cleared silver diamine fluoride…
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