A dental dam is a thin, flexible square of latex or similar material used as a barrier, either in dental procedures or during oral sex to reduce infection risk.

Basic definition

  • In dentistry, a dental dam (also called a rubber dam) is a small sheet used to isolate one or more teeth from the rest of the mouth so the area stays dry and protected during treatments like root canals or fillings.
  • In sexual health, the same type of thin sheet is placed between the mouth and the vulva or anus during oral sex to help block bodily fluids that can carry sexually transmitted infections (STIs).

How it is used in dentistry

  • The dam is stretched over a frame and a small hole is punched where the treated tooth will come through, while the rest of the mouth stays covered.
  • This helps keep saliva away from the treatment area and also stops small instruments or materials from accidentally being swallowed or inhaled.

How it is used for safer sex

  • For oral-vaginal or oral-anal sex, the dam is laid flat over the vulva or anus, and the mouth goes on the side facing the person giving oral sex, acting as a protective barrier.
  • It reduces the chance of spreading STIs like gonorrhea, chlamydia, herpes, or HPV through contact with genital or anal secretions, though it is not a form of birth control.

Materials and variations

  • Most dental dams are made from latex, but latex-free versions (such as polyurethane or nitrile) are available for people with latex allergies.
  • They’re typically small square sheets, and for sexual use they may come in different flavors or colors to make oral sex more comfortable or appealing.

Why people might use one

  • Dentists use dams to improve the quality and safety of dental procedures by keeping the area clean, visible, and protected.
  • Sexually active people may use dental dams as part of a safer sex strategy, especially for oral sex involving the vulva or anus, to lower infection risk while still maintaining physical intimacy.

Information gathered from public forums or data available on the internet and portrayed here.