In this study, we investigated the influence of light intensity on the surface-free energy and dentin bond strength of single-step selfetch adhesives. The adhesives were applied to the dentin surfaces of bovine mandibular incisors and cured with light intensities of 0 (no irradiation), 200, 400, and 600 mW/cm2. Surface-free energies were determined by measuring the contact angles of three test liquids placed on the cured adhesives. Dentin bond strengths of the specimens were also measured. Polymerization with a higher light intensity resulted in a lower surface-free energy of the cured adhesives. The greatest bond strength was achieved when a light intensity of 400 mW/cm2 or greater was used. Our data suggest that the surface-free energy and dentin bond strength of single-step self-etch adhesives are affected by light intensity of the curing unit.
CITATION STYLE
Nojiri, K., Tsujimoto, A., Suzuki, T., Shibasaki, S., Matsuyoshi, S., Takamizawa, T., & Miyazaki, M. (2015). Influence of light intensity on surface-free energy and dentin bond strength of single-step self-etch adhesives. Dental Materials Journal, 34(5), 611–617. https://doi.org/10.4012/dmj.2015-045
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