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Journal of Dental Specialities


Comparative evaluation of tensile bond strength of addition silicone impression material to different tray materials using different adhesive systems


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Author Details: SK Agarwal, Rutuparna Sasane

Volume : 4

Issue : 2

Online ISSN : 2393-9834

Print ISSN : 2320-7302

Article First Page : 162

Article End Page : 166


Abstract

Introduction: Accurate impressions are of utmost importance for a well fitting prosthesis. Use of custom tray and application of tray adhesives have been shown to provide best accuracy. But there is a dearth of studies on cohesive and adhesive bond strength of tray adhesive to the light polymerizing and autopolymerizing custom tray materials.
Aim & Objectives: Comparative evaluation of the tensile bond strength of addition silicone impression material to different tray materials using different adhesive systems.
Materials & Method:  Addition silicone impression material was used along with universal paint on tray adhesive. 20 samples of auto polymerizing tray material were made. In 10 samples adhesive was not applied (AM GROUP 1) and in the remaining 10 samples adhesive was applied (AMC GROUP 2). Similarly, 20 samples of light polymerizing tray material were made. In 10 samples adhesive was not applied (LM GROUP 3) and in remaining 10 samples adhesive was applied (LMC GROUP 4). The samples were placed in Universal Testing Machine to evaluate the tensile strength. The values obtained were tabulated & pair t test statistical analysis was performed to obtain the results.
Results: The mean tensile bond strength was highest in Group 4 Light cure acrylic resin mechanical + chemical [ LMC] (0.2694 MPa), followed by Group 2 Auto polymerizing acrylic resin  mechanical + chemical [AMC] (0.179 MPa), Group 3 Light  cure acrylic resin mechanical [ LM] (0.1302 MPa), & lowest in Group 1 Auto polymerizing  acrylic resin mechanical [AM] (0.101 MPa) respectively.
Conclusion: Application of tray adhesive increased the tensile bond strength between the tray and addition silicone impression material. Light polymerizing tray material with perforations and adhesive application showed highest tensile bond strength. The use of tray adhesive is highly recommended for making accurate impressions.

Keywords:
Tensile Bond Strength, Adhesive Systems, Tray Materials