[Precise mucostatic primary impression taking in the edentulous mandible. Hemi-arch method]

The author has shown that any impression material and its support in the mouth must be more malleable than the material used for the object to be reproduced. From a fall mandibular arch the impression of both sides, left and right, are taken successively by hemi-impressions without impression trays. Two individual half impression trays are made, placed in the mouth and are joined together using an auto-polymerizing resin. The resulting individual tray permits to make a perfect mucostatic impression. This method, far from taking more time, is a time saver, since the touch-ups to the individual tray and then to the finished prosthesis are practically non-existent or considerably reduced.