Bond strength of two nonaqueous elastomeric impression materials bonded to two thermoplastic resin tray materials.

Investigations indicate that custom impression trays enhance the accuracy of the fabrication cast. Multiple materials and techniques exist for custom tray fabrication, and variability in the bonding strength of adhesive agents supplied with nonaqueous elastomeric material have been reported. Bonding between two nonaqueous impression materials and two thermoplastic resin tray materials was assessed in this study. Standard tensile specimens were fabricated and the combinations of Hydrotray resin (smooth) with Hydrosil impression material recorded the greatest bonding strength, 797 kPa. Adhesion to resin tray materials was found to vary with material type and surface preparation.