“Silver” dental fillings for years have been scientifically confirmed to release elemental mercury vapor, which of course has a huge range of toxic neurological effects. Still being used in pediatric and standard dentist offices across the USA.
via alagard2: It’s true that elemental mercury is very poorly absorbed through the gastrointestinal tract (1: World Health Organization; International Program on Chemical Safety. Inorganic mercury: environmental health criteria 118. Geneva: World Health Organization; 1991, http://www.inchem.org/documents/ehc/ehc/ehc118.htm) and this is sometimes used as …