Aggressiveness of self-etch adhesives on unground enamel.
Manufacturers of mild self-etch adhesives advocate the adjunctive use of phosphoric acid etching when bonding to unground enamel. This study tested the null hypothesis that there is no difference between the recently introduced, more aggressive self-etch adhesives and a total-etch adhesive in bonding to unground enamel. The ultrastructure and microtensile bond strengths (microTBS) of Xeno III (Dentsply) and Simplicity (Apex Dental Materials), bonded to unground enamel, were examined after thermocycling. Clearfil SE Bond (Kuraray), a mild self-etch adhesive, was used as the negative control, and One-Step (BISCO), a total-etch adhesive bonded to phosphoric acid-etched unground enamel, was used as the positive control. Differences in the thickness of enamel hybrid layers were observed and the aggressiveness of apatite dissolution in the four adhesives.
Tay
Franklin R
FR
Faculty of Dentistry, University of Hong Kong, Hong Kong SAR, China. kfctay@hknet.com
Pashley
D H
DH
King
N M
NM
Carvalho
R M
RM
Tsai
J
J
Lai
S C N
SC
Marquezini
L
L
D000704:Analysis of Variance; D001840:Dental Bonding; D003743:Dental Enamel; D003745:Dental Enamel Permeability; D045662:Dental Etching / Q000379:methods*; D003799:Dental Stress Analysis; D017220:Dentin-Bonding Agents; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates; D008854:Microscopy, Electron; D008963:Molar; D019279:Resin Cements; D018709:Statistics, Nonparametric; D013718:Tensile Strength
C103506:Bis-GMA, BPDM, HEMA dental-bonding resin; C438313:Clearfil SE Bond; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D019279:Resin Cements; C487959:Simplicity (adhesive); C487957:Xeno III