In Vitro Evaluation of Bond Strength to Primary Molar Dentine and Microleakage Properties of Low Polymerization Shrinkage Silorane Based Composite Resin

Abstract

Objective: The aim of this in vitro study is to evaluate the microleakage properties and shear bond strength to primary and permanent molar dentine of the low polymerization shrinkage silorane based composite resin and to compare the results with a methacrylate based composite resin. Materials and Methods: Shear bond strength test method was selected to evaluate the bond strength of the groups. Buccal dentine surfaces of primary and permanent molar teeth were used. The surfaces of the broken samples were detected under stereomicroscope and were grouped as adhesive, cohesive and mix. Dye penetration method was selected for the microleakage test. Class V cavities were prepared on the buccal surfaces of primary and permanent molar teeth. Dye penetration levels were recorded in accordance with determined scores.Results: Silorane based composite resin was showed lower shear bond strength for primary and permanent molar dentine (p< 0.05). It was observed that most of the failures occurred in silorane based composite resin group, were adhesive type failures. According to the microleakage evaluation, primary molars were restored with silorane based composite resin were showed least microleakage (p< 0.05). Conclusion: The results of the laboratory tests should not be seen as the conclusion of the evaluated material but can be considered as preliminary information about the clinical performance of the material.