Aims and objectives: To evaluate and compare the bond strength, flexural strength, and hardness of conventional composite resin and self-adhesive composite resin.
Materials and methods: The materials, conventional composites (Herculite Precis by Kerr—nanohybrid composite material) and self-adhesive composites (Dyad Flow by Kerr), were compared based on their bond strength, flexural strength, and hardness. The test for bond strength was carried out on extracted premolars embedded in acrylic blocks. About 20 samples (10 of each group) were prepared by building up composite on these toothembedded acrylic blocks. For determination of flexural strength and microhardness of the material, 20 specimens of a specific size were made using aluminum molds, and the material was cured according to manufacturer’s instructions. Bond strength and flexural strength were determined with the help of a universal testing machine, and microhardness was determined with the help of Vickers hardness test.
Results: The results of the tests were obtained by two independent sample t tests. Bond strength of conventional composite resin and self-adhesive composite resin did not significantly differ in their values (p = 0.354). Similarly, the flexural strength of these two materials did not differ significantly (p = 0.213). However, the microhardness of conventional composite resin and self-adhesive composite resin differed significantly (p = 0.012).
Conclusion: Self-adhesive composite resins can replace conventional composite resins in terms of their bond strength and flexural strength. Since the values of microhardness differed significantly for these two materials, self-adhesive composite resins cannot be a substitute for conventional composite resins in terms of their microhardness.
Keywords: Bond strength, Conventional composites, Flexural strength, Hardness, Self-adhesive composites.
How to cite this article: Panchanadikar NT, Kunte SS, Khare MD. Comparison of Bond Strength, Flexural Strength, and Hardness of Conventional Composites and Self-adhesive Composites: An in vitro Study. Int J Prev Clin Dent Res 2016;3(4):251-257.
Source of support: Nil
Conflict of interest: None