Evaluation of dentin bonding performance and acid-base resistance of the interface of two-step self-etching adhesive systems

• Published in: Dental Materials Journal Vol. 28; no. 4; pp. 493 - 500
• Main Authors: IIDA, Yasuhiro, NIKAIDO, Toru, KITAYAMA, Shuzo, TAKAGAKI, Tomohiro, INOUE, Go, IKEDA, Masaomi, FOXTON, Richard M., TAGAMI, Junji
• Format: Journal Article
• Language: English
• Published: Japan The Japanese Society for Dental Materials and Devices 01.07.2009
• Subjects: Acetic Acid - pharmacology; Acid Etching, Dental - methods; Acid-base resistant zone; Cariostatic Agents - therapeutic use; Dental Bonding; Dental Stress Analysis; Dentin; Dentin bonding; Dentin Permeability; Dentin-Bonding Agents; Fluorides - therapeutic use; Humans; Resin Cements; Self-etching primer system; Surface Properties; Tensile Strength; Tooth Demineralization - chemically induced; Tooth Demineralization - prevention & control
• ISSN: 0287-4547; 1881-1361
• DOI: 10.4012/dmj.28.493

The purpose of this study was to evaluate dentin bond strengths and to observe the adhesive-dentin interface after acid-base challenge using fluoride-free and fluoride-releasing self-etching adhesive systems; Clearfil SE Bond (SE), FL-Bond (FL) and FL-Bond II(FL II). Fifteen dentin surfaces from human molars were ground and bonded with one of three adhesive systems. The microtensile bond strength (μTBS) test was performed at a crosshead speed of 1 mm/min. The interface of the bonded specimens after acid-base challenge were also examined by a SEM. The μTBS of SE were significantly higher than those of FL and FL II (p<0.05), however, there were no significant differences between FL and FL II (p>0.05). An acid-base resistant zone (ABRZ) was observed in all the groups, however, formation of the ABRZ was material dependent. Fluoride-release from the adhesive is a key factor to create thick ABRZ.