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Quintessence Publishing: Journals: QI
Quintessence International

Edited by Eli Eliav

ISSN 0033-6572 (print) • ISSN 1936-7163 (online)

Publication:
April 2007
Volume 38 , Issue 4

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Bond strength of adhesives to dentin involving total and self-etch adhesives

Feridun Hürmüzlü, DDS, PhD / A. Kemal Ozdemir, DDS, PhD / Ihsan Hubbezoglu / Akin Coskun / Seyda Herguner Siso

PMID: 17530053

Objective: Currently, the trend in dentin adhesion seems to be shifting from moist bonding systems to self-etching systems and from several application steps to single steps. However, recent studies have indicated that the performance of single-step adhesives was lower than the 2-step self-etch or total etch systems. In the present study, microtensile bond strength of a total etch, 2-step self-etch and single-step self-etch adhesives was comparatively evaluated. Method and Materials: The superficial occlusal dentin of 12 noncarious extracted human molars was exposed, finished with wet 600-grit silicon carbide paper, and a block of resin composite bonded with adhesives according to the manufacturers’ instructions. The teeth were kept in tap water for 24 hours at 37°C and sectioned to produce beams, with adhesive areas of ± 0.9 mm2 (4 beams per tooth were obtained). The specimens were stressed at a crosshead speed of 1 mm per minute until the bonds ruptured. Results: The mean bond strengths were calculated as MPa and compared by performing analysis of variance and Tukey tests to identify significant differences between the materials (P = 0.05). The mean bond strength of Clearfil SE Bond was significantly higher than that of OptiBond Solo Plus and iBond (P < .05). OptiBond Solo Plus gave significantly higher bond strengths than iBond (P < .05). Conclusions: The self-etching adhesive system Clearfil SE Bond (2 step) had higher bond strength than the 1-bottle self-etching adhesive iBond (single application) and the 2-step single-bottle system OptiBond Solo Plus (total etch). However, the 1-bottle adhesive system OptiBond Solo Plus (total etch system) had higher bond strength than the 1-bottle self-etching adhesive system iBond. (Quintessence Int 2007;38:358.e206–212)

Key words: acid etching, dentin, dentin adhesive, failure mode, layer, microtensile bond strength

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