Answer: (e)
Majority (87%) of mercury released to the environment comes from combustion of fuel and waste. Dentistry contributes less than 1%.
Mercury is present in numerous chemical forms. Methylated mercury compounds and Elemental mercury are toxic. Elemental or inorganic forms can be transformed into organic forms by biological systems.
Some mercury released into the air eventually collects in waterways and then enters the food chain. Amalgam in environment is bioaccumulative, which means that it can build up in fish and cause health problems in any animals that eat fish.
Dental Amalgam is a solid intermetallic compound, quite different from elemental, cationic and organic mercury. Dental amalgam is very stable.
REF: ADA BMP, 2003.
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