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Influence of light intensity on surface-free energy and dentin bond strength of single-step self-etch adhesives
Journal article   Open access   Peer reviewed

Influence of light intensity on surface-free energy and dentin bond strength of single-step self-etch adhesives

Kie Nojiri, Akimasa Tsujimoto, Takayuki Suzuki, Syo Shibasaki, Saki Matsuyoshi, Toshiki Takamizawa and Masashi Miyazaki
Dental materials journal, Vol.34(5), pp.611-617
2015
DOI: 10.4012/dmj.2015-045
PMID: 26438984
url
https://doi.org/10.4012/dmj.2015-045View
Published (Version of record) Open Access

Abstract

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.

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