amalgam

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amalgam

(əmăl`gəm), alloyalloy
[O. Fr.,=combine], substance with metallic properties that consists of a metal fused with one or more metals or nonmetals. Alloys may be a homogeneous solid solution, a heterogeneous mixture of tiny crystals, a true chemical compound, or a mixture of these.
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 containing mercurymercury
or quicksilver
[from the Roman god Mercury], metallic chemical element; symbol Hg [Lat. hydrargyrum=liquid silver]; at. no. 80; at. wt. 200.59; m.p. −38.842°C;; b.p. 356.58°C;; sp. gr. 13.55 at 20°C;; valence +1 or +2.
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. The alloy may be liquid or solid, depending on the proportion of mercury, although all naturally occurring amalgams, i.e., those of gold and silver, are solid. Amalgams are widely used. Silver, gold, and copper amalgams are used in dentistry, and tin amalgam is used in making mirrors.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/

amalgam

[ə′mal·gəm]
(metallurgy)
An alloy of mercury.
(mineralogy)
A silver mercury alloy occurring in nature.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

amalgam

1. an alloy of mercury with another metal, esp with silver
2. a rare white metallic mineral that consists of silver and mercury and occurs in deposits of silver and cinnabar
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Expense - gold cast fillings cost more than other materials; up to 10 times higher than cost of silver amalgam fillings.
The number of amalgam fillings, dental restorative materials historical and/ or present were noted from medical documentation and dental examination.
The decision followed research and advocacy campaigns to ban the use of the mercury dental amalgam in the country.
He added: "Many people who have amalgam fillings may be wondering about their safety.
While practically more durable and more aesthetically pleasing than silver-coloured mercury amalgams, composites are usually slightly more expensive but are health-friendly.
Or, have materials and methods changed so much that composites can now be used interchangeably with amalgam in most if not all clinical situations?
Regarding restorative materials, 46.5% participants considered the use of amalgam as safe during pregnancy, 36.3% did not and 17.2% did not know.
Alloy Ag wt% Sn wt% Cu wt% Zn wt % Amalgam alloy 40.31 29.26 19.79 0.74 Table 2: the mean values and improvement percentage% of the compressive strength and hardness of all amalgams used.
found that symptoms associated with amalgam toxicity match those that characterize chronic fatigue syndrome (CFS) and fibromyalgia (FM) including abnormal fatigue after physical exertion, muscular discomfort and pain, impaired memory and concentration, impaired sleep, depression, and GI problems.
On July 28, 2009, FDA issued its final rule on encapsulated dental amalgam and reaffirmed the agency's position that the material is a safe and effective restorative option for patients.
The studies on amalgam show good rates of survival compared with most of the other materials.
The research found the dentists' urine contained a mix of mercury from both the consumption of fish containing inorganic mercury as well as inorganic mercury vapor from the amalgam fillings.