Shear bond strength of hydrophilic adhesive systems to enamel.
OBJECTIVE
To compare the enamel shear bond strength of four hydrophilic adhesive systems: one multiple-bottle (Scotchbond Multi-Purpose Plus), two one-bottle (Stae, Single Bond) and one self-etching (Etch & Prime).


METHODS
120 bovine incisor teeth were obtained, embedded in polyester resin, polished to 600 grit to form standardized enamel surfaces, and randomly assigned to four groups (n = 30). Each adhesive system was used on enamel according to the manufacturer's instructions, and resin-based composite (Z100) cylinders with 3 mm diameter and 5 mm height were bonded. Specimens were stored in humid environment for 1 week, and bond strength was determined using a universal testing machine, at a crosshead speed of 0.5 mm/minute.


RESULTS
The mean shear bond strength values (MPa +/- SD) were: Single Bond: 24.28 +/- 5.27 (a); Scotchbond Multi-Purpose Plus: 21.18 +/- 4.35 (ab); Stae: 19.56 +/- 4.71 (b); Etch & Prime 3.0: 15.13 +/- 4.92 (c). ANOVA revealed significant difference in means (P < 0.01) and Tukey's test showed the statistical differences that are expressed by different letters for each group. It could be concluded that the self-etching adhesive system did not provide as good a bond to enamel surface, as did the one- and multiple-bottle systems.
Hara
A T
AT
School of Dentistry of Piracicaba, University of Campinas, Piracicaba, Brazil.
Amaral
C M
CM
Pimenta
L A
LA
Sinhoreti
M A
MA
D000818:Animals; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002417:Cattle; D003188:Composite Resins; D001840:Dental Bonding; D003743:Dental Enamel; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D011756:Diphosphates / Q000737:chemistry; D019544:Equipment Failure Analysis; D000431:Ethanol / Q000737:chemistry; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D011897:Random Allocation; D019279:Resin Cements / Q000737:chemistry; D013718:Tensile Strength
D003188:Composite Resins; D017220:Dentin-Bonding Agents; D011756:Diphosphates; C121187:Etch&Prime; D008689:Methacrylates; D019279:Resin Cements; C084018:Scotchbond Multi-Purpose; C403634:Stae bonding agent; C115612:single bond; D000431:Ethanol; D017438:Bisphenol A-Glycidyl Methacrylate