Inlays are indirect fillings applied in back teeth (premolars, molars). After removal of the old, defect filling or caries, an impression is made of the cavity (that is the drilled out defect). A filling is then made in the laboratory from gold or ceramic, which fits the cavity with the utmost precision and restores the original form of the tooth. In the second session, the inlay is cemented into place. Large inlays which cover the cusps are referred to as onlays. For many years, gold inlays have been the tried and tested solution and have a long lifespan. Today, aesthetic awareness has led to a decline in their use.