Lateral teeth restorations

Recommended: double-fibre technique

The use of enlaced retraction fibres (e.g.: Ultrapak, Ultradent Products/USA) contributes to the good displaying of preparation borders. Good and reproducible impression results shall be achieved by means of the double-fibre technique.

With this technique the first fibre is applied into sulcus. It remains there during the entire impression-making process. The second thicker fibre is placed on it to be removed immediately before the impression. The function of the first fibre is to prevent bleeding from the sulcus. At the same time it shall prevent re-adhesion of the gingival to the preparation border.

Custom trayWhen applying the two-phase impression technique, it is recommended to use the laboratory fabricated custom trays or at least individualization of stock the trays (Rimlock spoon) by partition of the distal end of the tray by the light hardening composite or thermoplastic material.
Impression materials The impression may be fabricated from all commonly used impression substances for fixed prosthetics (Hydrokoloid, polysiloxane, polyether). It is possible to apply both two-phase impression technique and corrective impression technique when using polysiloxane. With polyether materials only the two-phase impression technique shall be used.
Hint Even with the two-phase impression technique or with corrective impression technique there is recommended to blow the impression material with air after the application of the low-viscose components thus ensuring satisfactory layer on the tooth stump surface.