What is the primary function of a dental dam?

The primary function of a dental dam is to isolate the tooth being treated and maintain a dry working area. This isolation is crucial during various dental procedures, particularly for endodontic treatments or restorations, where moisture control is imperative for the success of the treatment. The dam creates a barrier that prevents saliva from interfering with the procedures, ensuring the area remains free from contamination and allowing for better visibility and accessibility for the dental professional.

In addition to moisture control, using a dental dam helps protect surrounding soft tissues—such as gums and cheeks—from potential injuries caused by dental instruments. It also improves the patient's comfort and minimizes their anxiety about the procedure, as they do not have to worry about the various instruments or the dentist's actions in their mouth. The isolation provided by the dental dam allows for effective treatment and helps in achieving a successful outcome.