Elastic Recovery after Elongation of VPS Impression Materials
Oct 4th, 2006
Good elastic recovery after deformation is a prerequisite for the clinical success of any precision impression material. Due to the high clinical relevance of this parameter, elastic recovery and compression set are part of ISO and ADA Standards for Elastomeric Dental Impression Materials. In these standard measurements recovery is investigated after a compressive distortion. There is a lack of data regarding elastic recovery behavior of impression materials after elongation instead of compression. The goal of this study was to compare the elastic recovery of different VPS wash impression materials after elongation. Elastic recovery was determined by a measurement of the corresponding permanent deformation.