Evaluation of dentin bonding performance and acid-base resistance of the interface of two-step self-etching adhesive systems.
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 (muTBS) 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 muTBS 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.
IIda
Yasuhiro
Y
Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan. hiroharry19750131@yahoo.co.jp
Nikaido
Toru
T
Kitayama
Shuzo
S
Takagaki
Tomohiro
T
Inoue
Go
G
Ikeda
Masaomi
M
Foxton
Richard M
RM
Tagami
Junji
J
D019342:Acetic Acid / Q000494:pharmacology; D000134:Acid Etching, Dental / Q000379:methods*; D002327:Cariostatic Agents / Q000627:therapeutic use; D001840:Dental Bonding; D003799:Dental Stress Analysis; D003804:Dentin; D003806:Dentin Permeability; D017220:Dentin-Bonding Agents; D005459:Fluorides / Q000627:therapeutic use; D006801:Humans; D019279:Resin Cements; D013499:Surface Properties; D013718:Tensile Strength; D017001:Tooth Demineralization / Q000139:chemically induced / Q000517:prevention & control*
D002327:Cariostatic Agents; D017220:Dentin-Bonding Agents; D019279:Resin Cements; D019342:Acetic Acid; D005459:Fluorides