Microtensile bond strengths of single-step self-etch adhesive systems to bovine dentin.
The purpose of this study was to examine the microtensile bond strength of a single-step self-etch adhesive system (Clearfil tri-S Bond and One-Up Bond F Plus) to bovine dentin. Adhesive was applied to a flat dentin surface, and resin composite was bonded according to the manufacturers' instructions. After 24 h storage in distilled water at 37 degrees C, hourglass-shaped specimens were produced. These were subjected to microtensile bond strength testing at a cross-head speed of 1.0 mm/min. The results were analyzed using Student's t-test at a significance level of 0.05. Field-emission scanning electron microscopy (FE-SEM) observations of the fractured specimens and the adhesive-treated dentin surfaces were also conducted. The bond strength of Clearfil tri-S Bond was not significantly different from that of One-Up Bond F Plus, 41.1 +/- 10.1 versus 42.3 +/- 6.0 MPa. Mode of failure analysis for Clearfil tri-S Bond revealed an equal distribution between the three types of failure, and the predominant mode of failure was adhesive for One-Up Bond F Plus. FE-SEM observations of dentin to which adhesive had been applied revealed that the smear layer had been removed and the collagen fibers exposed.
Uekusa
Satoshi
S
Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan.
Tsubota
Keishi
K
Tonegawa
Motoka
M
Tsuchiya
Hiroaki
H
Iwasa
Mika
M
Kawamoto
Ryo
R
Takamizawa
Toshiki
T
Miyazaki
Masashi
M
D000134:Acid Etching, Dental / Q000379:methods*; D000818:Animals; D002417:Cattle; D001840:Dental Bonding; D003799:Dental Stress Analysis; D003804:Dentin; D003806:Dentin Permeability; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D008855:Microscopy, Electron, Scanning / Q000379:methods; D019279:Resin Cements; D016369:Smear Layer; D013718:Tensile Strength
C515604:Clearfil Tri-S Bond; D017220:Dentin-Bonding Agents; D008689:Methacrylates; C446260:One-Up-Bond F; D019279:Resin Cements