Dental dam

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Science and technology

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What Wikipedia says

A dental dam or rubber dam is a thin, 6-inch (150 mm) square sheet, usually latex or nitrile, used in dentistry to isolate the operative site (one or more teeth) from the rest of the mouth. Sometimes termed "Kofferdam" (from German), it was designed in the United States in 1864 by Sanford Christie Barnum.

Excerpt from the Wikipedia article “Dental dam”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: inga, CC BY 2.0, via Wikimedia Commons.