Dental amalgam is one of the oldest materials used in oral health care. It is one of the safest, durable and least expensive materials for a restoration. Although there are some concerns about mercury toxicity, it is estimated that more than 1 billion amalgam fillings are placed annually. One of its most common uses is in small-to moderate-sized posterior cavities, where moisture control is problematic and where cost is an overriding patient concern.

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