What is the primary purpose of a dental dam?

The primary purpose of a dental dam is to keep teeth dry during dental procedures. By isolating the area being treated, a dental dam prevents saliva and moisture from interfering with the work being done, such as filling cavities or placing restorations. This isolation is crucial because moisture can adversely affect the adhesion of dental materials, leading to compromised outcomes.

Using a dental dam also enhances efficiency for the dentist, as it provides a clear working field without the need for frequent suctioning of saliva. While other benefits exist, such as improving visibility and providing some protection against infection, the main function remains the maintenance of a dry and clean operating area, which is vital for successful dental procedures.