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An amalgam is an alloy of mercury with another metal. It may be a liquid, a soft paste or a solid, depending upon the proportion of mercury.
Amalgam is a mixture of two or more metals (alloy) with mercury which has been purified first by distillation to remove impurities. Major components of the alloy are silver, tin, and copper. The composition of the alloy powder is controlled by ISO standard for dental amalgam alloy (ISO 1559) to control the properties of amalgam. [11]
Sodium amalgam, with the common formula Na(Hg), is an alloy of mercury and sodium. The term amalgam is used for alloys, intermetallic compounds , and solutions (both solid solutions and liquid solutions) involving mercury as a major component.
An alloy of aluminium and gallium was proposed as a method of hydrogen generation, as the gallium renders the aluminium more reactive by preventing it from forming an oxide layer. [4] Mercury has this same effect on aluminium, but also serves additional functions related to electron transfer that make aluminium amalgams useful for some ...
This discussion of the dental amalgam controversy outlines the debate over whether dental amalgam (the mercury alloy in dental fillings) should be used. Supporters claim that it is safe, effective and long-lasting, while critics argue that amalgam is unsafe because it may cause mercury poisoning and other toxicity. [1] [2] [3]
The composition of dental amalgam is controlled by the ISO Standard for dental amalgam alloy (ISO 1559). [12] The major components of amalgam are silver, tin and copper. [12] Other metals and small amounts of minor elements such as zinc, mercury, palladium, platinum and indium are also present. [12]
Fragments of copper alloy unearthed at one of Britain's most important archaeology sites have been revealed to be parts of an incredibly rare Iron Age helmet. The discovery was made by the British ...
Amalgam is a metallic filling material composed from a mixture of mercury (from 43% to 54%) and a powdered alloy made mostly of silver, tin, zinc and copper, commonly called the amalgam alloy. [16] Amalgam does not adhere to tooth structure without the aid of cements or use of techniques which lock in the filling, using the same principles as a ...