Restor Dent Endod.  2015 Feb;40(1):68-74. 10.5395/rde.2015.40.1.68.

Effect of additional etching and ethanol-wet bonding on the dentin bond strength of one-step self-etch adhesives

Affiliations
  • 1Department of Conservative Dentistry, School of Dentistry, Pusan National University, Yangsan, Korea. jeongkil@pusan.ac.kr
  • 2Department of Dental Materials, School of Dentistry, Pusan National University, Yangsan, Korea.

Abstract


OBJECTIVES
This study examined the effects of additional acid etching on the dentin bond strength of one-step self-etch adhesives with different compositions and pH. The effect of ethanol wetting on etched dentin bond strength of self-etch adhesives was also evaluated.
MATERIALS AND METHODS
Forty-two human permanent molars were classified into 21 groups according to the adhesive types (Clearfil SE Bond [SE, control]; G-aenial Bond [GB]; Xeno V [XV]; Beauti Bond [BB]; Adper Easy Bond [AE]; Single Bond Universal [SU]; All Bond Universal [AU]), and the dentin conditioning methods. Composite resins were placed on the dentin surfaces, and the teeth were sectioned. The microtensile bond strength was measured, and the failure mode of the fractured specimens was examined. The data were analyzed statistically using two-way ANOVA and Duncan's post hoc test.
RESULTS
In GB, XV and SE (pH < or = 2), the bond strength was decreased significantly when the dentin was etched (p < 0.05). In BB, AE and SU (pH 2.4 - 2.7), additional etching did not affect the bond strength (p > 0.05). In AU (pH = 3.2), additional etching increased the bond strength significantly (p < 0.05). When adhesives were applied to the acid etched dentin with ethanol-wet bonding, the bond strength was significantly higher than that of the no ethanol-wet bonding groups, and the incidence of cohesive failure was increased.
CONCLUSIONS
The effect of additional acid etching on the dentin bond strength was influenced by the pH of one-step self-etch adhesives. Ethanol wetting on etched dentin could create a stronger bonding performance of one-step self-etch adhesives for acid etched dentin.

Keyword

Ethanol-wet bonding; One-step self-etch adhesive; pH of adhesives

MeSH Terms

Adhesives*
Composite Resins
Dentin*
Ethanol
Humans
Hydrogen-Ion Concentration
Incidence
Molar
Tooth
Adhesives
Composite Resins
Ethanol

Figure

  • Figure 1 Effect of additional acid etching on the dentin bond strength (MPa) of adhesives. The asterisk indicates that there was significant difference. µTBS, microtensile bond strength; NOAE, no acid etching; AESEW, acid etching without ethanol wet-bonding; SE, Clearfil SE Bond; GB, Gaenial bond; XV, Xeno V; BB, BeutiBond; AE, Adper Easy Bond; SU, Single Bond Universal; AU, All bond Universal.

  • Figure 2 Effect of wetting etched dentin with ethanol on the dentin bond strength (MPa) of adhesives. The asterisk indicates that there was significant difference. µTBS, microtensile bond strength; AESEW, acid etching without ethanol-wet bonding; AEWEW, acid etching with ethanol-wet bonding; SE, Clearfil SE Bond; GB, Gaenial bond; XV, Xeno V; BB, BeutiBond; AE, Adper Easy Bond; SU, Single Bond Universal; AU, All bond Universal.


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