A dental dam is a thin, flexible sheet made of latex or polyurethane. The main purpose of a dental dam is to protect against sexually transmitted diseases (STDs) during oral sex, but it does not protect you from pregnancy.
Dental dam is a small, flexible piece of polyurethane or latex that you can use to protect yourself during oral intercourse. It cannot be used as a contraceptive, but it can help decrease the transfer of body fluids that carry Sexually transmitted infections or Sexually transmitted diseases.
Dental dams are rectangular sheets that were designed for dental procedures but today are drastically used in sexual health for safeguarding one from oral sex.