Journal
DENTAL MATERIALS JOURNAL
Volume 37, Issue 2, Pages 244-255Publisher
JAPANESE SOC DENTAL MATERIALS DEVICES
DOI: 10.4012/dmj.2017-059
Keywords
Phosphoric acid pre-etching; Enamel bond fatigue durability; Universal adhesive; Two-step self-etch adhesive
Funding
- Japan Society for the Promotion of Science [17K11716, 16K11565, 17K17141]
- Grants-in-Aid for Scientific Research [16K11565, 17K17141, 17K11716] Funding Source: KAKEN
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The effect of phosphoric acid pre-etching on enamel bond fatigue durability of universal adhesives and two-step self-etch adhesives was investigated, Four universal adhesives and three two-step self-etch adhesives were used. The initial shear bond strengths and shear fatigue strengths to enamel with and without phosphoric acid pre-etching using the adhesives were determined. SEM observations were also conducted. Phosphoric acid pre-etching of enamel was found to increase the bond fatigue durability of universal adhesives, but its effect on two-step self-etch adhesives was material-dependent. In addition, some universal adhesives with phosphoric acid pre-etching showed similar bond fatigue durability to the two-step self-etch adhesives, although the bond fatigue durability of universal adhesives in self-etch mode was lower than that of the two-step self-etch adhesives. Phosphoric acid pre-etching enhances enamel bond fatigue durability of universal adhesives, but the effect of phosphoric acid pre-etching on the bond fatigue durability of two-step self-etch adhesives was material-dependent.
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