A comparative evaluation of the tensile bond strength between addition silicone impression material and two different tray material after application of various tray adhesives: an in vitro study

Aims: The Aim of this study was to evaluate the tensile bond strength between addition silicone medium body impression material and two different tray material (auto and light polymerizing) after application of various types of adhesives on the samples of tray materials. Methods and Materials: Eighty flat, squares, resin plates were fabricated with auto and light polymerizing tray material & a hexagonal lock nut was reinforced with it. Tray adhesives was applied & medium body addition silicone impression material was injected into the gap of 3mm between the two plates. Ten samples were prepared for each type of tray adhesives. A total, 40 samples each of auto & light polymerizing tray material were been fabricated & were tested for tensile bond strength using universal testing machine. Results: For auto polymerizing tray material significant difference was found in all the adhesives except for 3M and GC which showed statistically no significant difference & for light polymerizing tray material, significant difference was found in all the adhesives except for 3M and Dentsply which showed statistically no significant difference. Conclusions: The auto & light polymerizing tray material exhibited similar bond strength values when same adhesive was used. With auto polymerizing tray material, Dentsply tray adhesive has shown highest tensile bond strength followed by 3M, GC and Coltene. With light polymerizing tray material, 3M tray adhesive has shown highest mean tensile bond strength followed by Dentsply, GC and Coltene.