Scientifically Proven Facts About Mercury & Dental Amalgam Dental Amalgam contains about 50% Mercury. Mercury has been scientifically demonstrated to be more toxic than Lead, Cadmium, or even Arsenic. Mercury leaves dental amalgam continuously throughout the lifetime of the filing.(7) Mercury vapour is the main way that mercury comes out of amalgam.(31) Mercury vapour is … Continue reading Scientifically Proven Facts About Mercury and Dental Amalgam