An comparative evaluation of tensile bond strength of polyvinyl siloxane impression material to tray material using three different tray adhesive: An in vitro study

Abstract

Elastomeric impression materials are the materials of choice in Prosthodontics for its better surface detail reproduction. Vinyl polysiloxane cannot give an accurate reproduction of the tissues if there is separation of impression materials from the tray which may results in a distorted impression leading to poor final restorations. Hence, a tray adhesive needs to be applied to the tray to obtain an accurate and consistent impression. The purpose of the study was to evaluate the compatibility of impression materials to acrylic materials using three different tray adhesive, by determining the tensile bond strength. Acrylic samples were fabricated from a metal die which was milled as per specifications of which putty impressions were made to fabricate the acrylic samples. On the finished and polished samples tray adhesives of 3 different brands were applied as per the group divided. The samples prepared were subjected to test for tensile bond strength on a digitalized UTM. The results obtained were statistically analyzed. The highest tensile bond strength was shown by 3M followed by Denstply, and Coltene tray adhesive.