[Theory and practice of the application of rubber dam]

The application of Kofferdam offers a series of advantages for patients and medical personnel which especially speak well for an application in the preserving stomatology. Among other things, these advantages are: protection from aspiration, protection from infections, provision of an aseptic working place, keeping the soft tissues away, which results in an improved sight and easy access. Moreover, the application of Kofferdam enables by absolute drainage a material application in nearly due form. Besides the description of the application of Kofferdam, the article comprises practice-related recommendations facilitating the application of technique.