Several adhesive systems for deciduous and permanent teeth are available for use in restorative treatment against caries. However, studies emphasising the property of different adhesive systems to permanent dentin are not many. The purpose of this study was to estimate and compare the Tensile Bond Strengths and to observe the resin-dentin interface of total-etch and self-etch bonding systems to dentin of permanent molar teeth.
Thirty non-carious extracted permanent molars were randomly assigned to two groups according to the adhesives used. The specimens were subjected to tensile bond strength (TBS) testing at a crosshead speed of 1 mm/min. Mean TBS was statistically analyzed with student ‘t’ test. Interfacial morphologies were analyzed by Scanning Electron Microscopy (SEM).
Etch-and-rinse adhesive Adper Single Bond 2 Total Etch yielded high bond strength when applied to permanent dentin. For the one-step Adper Easy One self-etching adhesive, the bond strength was relatively low. SEM interfacial analysis revealed funnel shaped resin tags and a rough hybrid layer in specimens subjected to total etch system and cylindrical shaped and a smooth hybrid layer in specimens subjected to self etch system.
Permanent Molars, Self Etch, Total Etch, Tensile Bond Strength, Resin-Dentin Interface
