抄録
We compared the surface free-energies and dentin bond strengths of single-step self-etch adhesives with and without an oxygen-inhibited layer. The labial dentin surfaces of bovine mandibular incisors were wet ground with #600-grit silicon carbide paper. The adhesives were applied to the ground dentin, light-irradiated, and the oxygen-inhibited layer was either retained or removed with ethanol. The surface free-energies were determined by measuring the contact angles of three test liquids placed on the cured adhesives. The dentin bond strengths of specimens with and without the oxygen-inhibited layer were measured. For all surfaces, the value of the estimated surface tension component was relatively constant at 35.5-39.8mJm -2. The value of the, Lewis acid component increased slightly when the oxygen-inhibited layer was removed, whereas that of the, Lewis base component decreased significantly. The bond strengths of the self-etch adhesives were significantly lower in specimens without an oxygen-inhibited layer (13.2-13.6MPa) than in those with an oxygen-inhibited layer (17.5-18.4MPa). These results indicate that the presence of an oxygen-inhibited layer in single-step self-etch adhesives with advanced photoinitiators promotes higher dentin bond strength.
本文言語 | 英語 |
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ページ(範囲) | 395-400 |
ページ数 | 6 |
ジャーナル | European Journal of Oral Sciences |
巻 | 119 |
号 | 5 |
DOI | |
出版ステータス | 出版済み - 10月 2011 |