Amalgam (dentistry)
In dentistry, amalgam is an alloy of mercury with various metals used for dental fillings. It commonly consists of mercury (50%), silver (~22-32% ), tin (~14%), copper (~8%), and other trace metals. In the 1800s, amalgam became the dental restorative material of choice due to its low cost, ease of application, strength, and durability.
Recently however, its popularity has diminished somewhat. Concern for aesthetics, environmental pollution, health, and the availability of improved, reliable, composite materials have all contributed. In particular, concerns about the toxicity of mercury have made its use increasingly controversial. Due to a worldwide plan to phase out the use of mercury, Norway and Denmark have deliberated in 2009 a ban of mercury dental amalgam.Sweden announced a similar ban and dentists in Sweden will no longer be allowed to use mercury in fillings after April 1, 2008. The Swedish amalgam ban is for both environmental and health issues, according to the Swedish authorities.
Read more about Amalgam (dentistry): History of Use, Dental Amalgam Toxicity Controversy