BOND STRENGTH OF 2 NONAQUEOUS ELASTOMERIC IMPRESSION MATERIALS BONDEDTO 2 THERMOPLASTIC RESIN TRAY MATERIALS

Investigations indicate that custom impression trays enhance the accur acy of the fabrication cast. Multiple materials and techniques exist f or custom tray fabrication, and variability in the bonding strength of adhesive agents supplied with nonaqueous elastomeric material have be en reported. Bonding between two nonaqueous impression materials and t wo thermoplastic resin tray materials was assessed in this study. Stan dard tensile specimens were fabricated and the combinations of Hydrotr ay resin (smooth) with Hydrosil impression material recorded the great est bonding strength, 797 kPa. Adhesion to resin tray materials was fo und to vary with material type and surface preparation.