DOI: 10.36347/sjds.2022.v09i05.003

Pages: 93-99

Background and Aim: One of the important disadvantages of amalgam restorations is its disability of bonding to tooth substance that necessitates over preparation of the tooth to produce mechanical retention for the filling material. Thus, several materials were marked to bond Amalgam to tooth structure. Material and Methods: 20 extracted human premolars were flattened occlusally to expose dentin. The teeth where mounted in phenolic rings with acrylic resin. Split Teflon mold was applied over the dentin surface contains a holed cylinder with a diameter of 2 mm and a height of 2 mm works as a matrix for applying the filling material. The teeth were divided into 2 equal groups according to the restorative and bonding materials used: (PQ Amalgam-Amalgam, Excite-Estilite), Specimens were thermo cycled (500 cycles between 5°C and 55°C). The fracture surfaces were then observed by a stereomicroscope. Results: Data was subjected to a T student, statistical studies revealed that shear bond strengths of the Excite-Estilite group were greater than the PQ Amalgam-Amalgam group (p<0.05). Conclusions: This study showed, Bonding amalgam to dentin using its special bonding material did not increase the bond strength between amalgam and dentin.