Tensile bond strength of four adhesive systems to dentin.
OBJECTIVE
To assess, in vitro, the tensile bond strength to dentin of the following adhesive systems: Single Bond (3M), One Coat Bond (Coltène), Clearfil Liner Bond 2 V (Kuraray) and Etch & Prime 3.0 (Degussa).


METHODS
Thirty third molars, extracted according to therapeutic indication, were used. The roots were removed at the cement-enamel junction level and the crowns were sectioned in a mesial-distal direction, obtaining buccal and lingual halves. The dental portions were included in self-cured acrylic resin, abraded on a lathe under water spray and polished to 400 and 600 grit. The adhesive systems were applied on dentin according to manufacturers' instructions and resin-based composite (Z100) cones were bonded. For each adhesive system, 15 specimens were prepared, stored in distilled water at 37 degrees C during 24 hrs and submitted to tensile bond strength tests on a universal testing machine (EMIC DL-2000) at a crosshead speed of 0.5 mm/min.


RESULTS
The mean tensile bond strength to dentin (MPa +/- SD) were statistically different (ANOVA, Tukey's tests, P < or = 0.01, shown by asterisks) from each other: (1) Clearfil Liner Bond 2 V* = 24.8 +/- 3.3; (2) One Coat Bond** = 20.4 +/- 2.0; (3) Single Bond** = 18.1 +/- 2.4; (4) Etch & Prime 3.0*** = 5.8 +/- 2.4.
Spohr
A M
AM
Pontifical Catholic University of Rio Grande do Sul, Brazil. anaspohr@zaz.com.br
Conceição
E N
EN
Pacheco
J F
JF
D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate; D001840:Dental Bonding; D003804:Dentin; D017220:Dentin-Bonding Agents; D011756:Diphosphates; D000431:Ethanol; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates; D008964:Molar, Third; D011897:Random Allocation; D013718:Tensile Strength
C112274:Clearfil Liner Bond 2; D017220:Dentin-Bonding Agents; D011756:Diphosphates; C121187:Etch&Prime; D008689:Methacrylates; C426984:One Coat Bond; C115612:single bond; D000431:Ethanol; D017438:Bisphenol A-Glycidyl Methacrylate