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.

amalgam

[ə′mal·gəm]
(metallurgy)
An alloy of mercury.
(mineralogy)
A silver mercury alloy occurring in nature.

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
References in periodicals archive ?
Other nations look to the amalgam issue as a litmus test," says Dr.
Minnesota presented a bill in the 2007-2008 legislative session requiring the removal of amalgam restorations prior to the cremation process.
Though mercury is a potent neurotoxin, amalgam fillings are considered safe by most dentists.
If you're a grinder and have any amalgam fillings, talk with your dentist about getting a night guard to prevent leakage.
If you refer to the video of The Smoking Tooth (see sidebar for link), it is apparent that mercury present in amalgam fillings releases its metal for years and is not stable (as claimed by dental trade companies).
Amalgam has long been recognized as a durable, safe and effective filling material.
In a five-year randomized trial, researchers at Children's Hospital in Boston tested kidney function, IQ, memory, and visual skills in 534 children with amalgam or tooth-colored composite fillings.
Bender adds that five states have mandated that dentist offices install amalgam separators that keep dental mercury waste out of the environment.
Originally developed for Lotus's parent, Malaysian carmaker Proton, this car is an amalgam of the Lotus Elise and the Elise-based Opel Speedster.
The study shows that efficient dental providers produce longer lasting restorations regardless of material, and there is no difference in survival rate between amalgam and composite restorations when the restoration is performed by an efficient provider.
Last July, CIT took 130,000 s/f at 505 Fifth Avenue, an eye-catching glass-sheathed amalgam of competing shapes and angles that just finished construction.
By the early 19th century, English and French dentists began using an amalgam of mercury and silver to fill cracks in teeth.