Clinically oriented evaluation of the accuracy of commonly used impression materials.

The elastomeric impression materials used in this study exhibited comparable clinical accuracy when properly handled. In general, they were significantly more accurate than reversible hydrocolloid. In fact, because of their excellent dimensional stability, impressions made with addition curing silicone-base or polyether rubber impression materials remained accurate even after 1 week. Elastomeric impression materials have established themselves with reversible hydrocolloids as elastic impression materials that are capable of producing clinically accurate dies with an excellent replication of surface detail.