amalgam

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Related to Amalgams: dental amalgam alloy

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 ?
Although they have not totally banned mercury amalgams, Germany and Canada forbid their use in pregnant women and children--a path that US Food and Drug Administration (FDA) was prepared to follow in January 2012.
Dental amalgam may cause mercury poisoning in genetically susceptible children, according to a report published February 1 in the peer-reviewed journal, Biometals.
Maternal amalgam dental fillings as the source of mercury exposure in developing fetus and newborn.
Though mercury is a potent neurotoxin, amalgam fillings are considered safe by most dentists.
When a gold crown or filling touches an amalgam filling, these two metals create a mild electrical current that erodes amalgams and releases even more mercury.
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).
This second part of our review series on dental materials and techniques for the restoration of primary teeth, deals with amalgam, glass ionomer cements and the appropriate polishing and finishing techniques.
The final patient sample size included 279,999 restorations, of which 194,484 were amalgams and 85,515 were composites.
Later, in 1991, support groups for people who claimed to have problems resulting from mercury amalgams began forming in the United States.
Estimates of the amount of mercury released from dental amalgams range from three to 17 micrograms per day.
Dental amalgams also lead to another source of mercury in the environment-that from crematorium emissions when the bodies of the departed with less-than-perfect teeth are burned, according to Phil Bobel, environmental compliance manager for the Palo Alto plant.