European Journal of Molecular & Clinical Medicine

Context: The development of Universal adhesives has simplified the adhesive protocols in dentistry. Contact angle of adhesives are indicative of bonding ability and can predict longevity of the restoration. Aims: To compare the contact angles of three different universal adhesives and influence of prior acid etching on their contact angles. Materials and Methods: 36 caries-free intact extracted human mandibular molars were used. Two sections parallel to the occlusal surface were made beneath the dentin–enamel junction to obtain 2mm thick superficial dentin slices.Three adhesive systems were used- Single Bond Universal (3M ESPE, St Paul, MN, USA), Solare Universal Bond (GC Corporation, Tokyo, Japan) and Tetric N Bond Universal adhesive (Ivoclar Vivadent). Measurement of static contact angle θ* with 1.0 μL droplets of liquid adhesives, was performed by the sessile drop method using Rame Harte Goniometer.