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Amalgam filling on first molar. In dentistry, amalgam is an alloy of mercury used to fill teeth cavities. [1] It is made by mixing a combination of liquid mercury and particles of solid metals such as silver, copper or tin.
Oral galvanism, amalgam disease, or Galvanic shock was a term for the association of oral or systemic symptoms to either: electric currents between metal in dental restorations and electrolytes in saliva or dental pulp. [45] [46] [47] Any existence of galvanic pain or association of either currents or mercury to presence of symptoms has been ...
Zinc amalgam finds use in organic synthesis (e.g., for the Clemmensen reduction). [3] It is the reducing agent in the Jones reductor, used in analytical chemistry.Formerly the zinc plates of dry batteries were amalgamated with a small amount of mercury to prevent deterioration in storage.
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 ...
Auguste Taveau (Louis Augustin Onésiphore Taveau) was a French dentist born in Le Havre, the 28th of August 1792. [1] Date and place of his death are still unknown. In 1826, he was among the first to use amalgam as a dental restorative material, [2] although he had originally developed it as early as 1816.
Amalgams should be avoided if the patient has a history of sensitivity to mercury or other amalgam components. Besides that, amalgam is avoided if there is extensive loss of tooth substance such that a retentive cavity cannot be produced, or if excessive removal of health tooth substance would be required to produce a retentive cavity.
Hal Alan Huggins (1937 – November 29, 2014) was an American alternative dentistry advocate and campaigner against the use of dental amalgam fillings and other dental therapies that he believed to be unsafe. [1] [2] Huggins began to promote his ideas in the 1970s and played a major role in generating controversy over the use of amalgam. [3]
Sodium amalgam is a by-product of chlorine made by mercury cell electrolysis. In this cell, brine (concentrated sodium chloride solution) is electrolysed between a liquid mercury cathode and a titanium or graphite anode. Chlorine is formed at the anode, while sodium formed at the cathode dissolves into the mercury, making sodium amalgam.