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Why does aluminum foil and other metals hurt when it touches my filling?

April 26, 2017aluminum dental Filling foil Health hurt metals touches

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Why does aluminum foil and other metals hurt when it touches my filling?

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An electrical current is set up between 2 dissimilar metals in your mouth, i.e. the aluminium foil and the silver/tin/mercury in the amalgam fillings. This is called galvanism. The further apart the metals are on the chemical periodic table, then the greater the galvanism.