An impression technique for cast restorations

A technique has been described for making impressions for cast restorations. It can be used for a single preparation or for multiple preparations in a single arch. The most unique feature of the teachnique is that the tray is formed over the prepared teeth, either directly or indirectly. The impression material is confined to a relatively small area and is forced by positive pressure into the gingival sulci around the prepared teeth. The result is an impression that is dense and void free and which records marginal and coronal surfaces with accurate detail. A dentist who is trained and experienced in the use of tray techniques can easily make the transition to this method.