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 ?
Amalgam - Resurrection and redemption, Part 2: The medical mythology of anti-amalgam.
The amalgam with 3% from zirconium oxide was analyzed separately using x-ray diffraction techniques to determine the existing phases in the amalgam alloy.
The Spearman's correlation was used to examine the relationship between Hg levels in urine and air as well as between biological Hg levels and gender, age, time of exposure to Hg and number of amalgam fillings per week.
Amalgam Collection of England is recognised worldwide as makers of hand-made large-scale models that capture the style and spirit of each car.
SCENIHR is expected to publish its preliminary report on the safety of dental amalgam and alternatives for patients and users in the coming weeks.
Its two scientific committees - the Scientific Committee on Health and Environmental Risks (SCHER) and the Scientific Committee on Emerging and Newly Identified Health Risks (SCENIHR) - both backed this approach in 2008, finding that the use of dental amalgam containing mercury did not pose serious or long-term threats to health, apart from allergies.
Composite shows lower wear resistance than amalgam and not the material of choice for patients with heavy occlusion, bruxism and large occlusal coverage (24,25).
This is an important consideration for studies seeking to determine the health risks of mercury vapor inhalation from dental amalgams.
Cumulative and incident failure of restorations at 12 and 24 months was calculated for dentists who placed ART or amalgam restorations, while the same was generated for auxiliaries who placed ART restorations only at 12 months as no follow-up was possible after 2 years in this group.
Dental amalgam apparently was first used by the Chinese.
0]) released during preparation of mercury amalgam in dental offices (Guzzi and Pigatto 2007; Wannag and Skjaerasen 1975).
So, since I already have some old amalgam fillings in my back chompers, I asked if I could just have the cheaper fillings from now on.