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A dental dam or rubber dam is a thin, 6-inch square sheet, usually latex or nitrile, used in dentistry to isolate the operative site from the rest of the mouth. Sometimes termed "Kofferdam" , it was designed in the United States in 1864 by Sanford Christie Barnum . It is used mainly in endodontic, fixed prosthodontic and general restorative treatments. Its purpose is both to prevent saliva interfering with the dental work , and to prevent instruments and materials from being inhaled, swallowed or damaging the mouth. In dentistry, use of a rubber dam is sometimes referred to as isolation or moisture control.
Dental dams are also used for safer oral sex.
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