Evaluation of adhesive systems using acidic primers.
OBJECTIVE
To evaluate in vitro the dentin and enamel shear bond strength of two adhesive systems that contain acidic primers.


METHODS
Clearfil Liner Bond 2 (CLB2) and Denthesive II (DTII), containing acid primers were used with (ETCH) and without (NOET) etching. Scotchbond Multi-Purpose (SBMP) was utilized as a control. Sixty flat enamel and dentin bonding sites were prepared to 600 grit on extracted human molars. Both acidic primer systems were used with (ETCH) and without etching (NOET) for both enamel and dentin surfaces. The control group used etching only. After applying primer and adhesive, a microfill composite (Silux Plus) was placed in a 2.5 mm diameter matrix on the tooth surface, and polymerized for 40 seconds. All specimens were thermocycled 500 times. Shear bond strengths were determined using a Zwick testing machine.


RESULTS
One-way ANOVA revealed significant differences among groups for enamel (P = 0.0001) and dentin (P = 0.0002). Duncan's multiple range test (alpha = 0.05) revealed that enamel shear bond strength of DTII-ETCH was equal to that of CLB2-NOET and these were significantly greater than CLB2-ETCH, SBMP and DTII-NOET. For dentin, bond strengths for CLB2-ETCH and CLB2-NOET were significantly greater than DTII-NOET.
Gordan
V V
VV
University of Florida, College of Dentistry, Department of Operative Dentistry, Gainesville 32610-0415, USA.
Vargas
M A
MA
Cobb
D S
DS
Denehy
G E
GE
D000134:Acid Etching, Dental; D000704:Analysis of Variance; D001840:Dental Bonding / Q000379:methods* / Q000706:statistics & numerical data; D003743:Dental Enamel / Q000187:drug effects; D003804:Dentin / Q000187:drug effects; D017220:Dentin-Bonding Agents / Q000737:chemistry* / Q000494:pharmacology; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing / Q000379:methods / Q000706:statistics & numerical data; D008689:Methacrylates / Q000737:chemistry* / Q000494:pharmacology; D008963:Molar; D019279:Resin Cements; D013718:Tensile Strength
C112274:Clearfil Liner Bond 2; C080827:Denthesive; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D019279:Resin Cements; C084018:Scotchbond Multi-Purpose