Amalgam fillings are also known as silver fillings. Amalgam is formed with silver tin and mixing of mercury with copper alloy. Amalgam fillings have been used almost in for 150 years
These fillings have some disadvantages. They are not aesthetic and sometimes it causes allergies.There are some discussions concerned about mercury in amalgam fillings. However, mercury combine with other materials in amalgam fillings, so the chemical structure changes and becomes harmless.
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