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dental amalgam
dental amalgam
An amalgam is an alloy of mercury with other metals. Most metals except iron and platinum will form amalgams; those with high mercury content are liquids, but most are solid. Amalgams of some noble metals occur naturally: silver and gold are extracted from their ores by forming amalgams. Dental amalgam, containing silver, copper, zinc, and tin, is used to fill teeth. Various amalgams may be used as electrodes.

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