A rubber dam is a dental tool used to create a dry and isolated working area during various dental procedures. It consists of a thin, flexible sheet made from latex or latex-free materials, which is stretched over a frame and anchored in place with clamps. By placing the rubber dam around the tooth or teeth being treated, it prevents saliva, blood, and other contaminants from interfering with the procedure. This isolation enhances visibility, infection control, and patient comfort. Rubber dams are particularly useful in tasks like cavity fillings, root canals, and dental crown placements, ensuring precision and efficiency in modern dentistry.