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Year : 2007  |  Volume : 7  |  Issue : 2  |  Page : 77-80

Tensile bond strength: Evaluation of four current adhesive systems in abraded enamel and deep dentin

1 Department Dentistry, University Estadual de Montes Claros, Montes Claros, Minas Gerais, Brazil
2 Department Restorative Dentistry, University Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
3 Department Dental Materials, University Estadual Paulista, Araraquara, São Paulo, Brazil
4 Department Dentistry, University Estadual Paulista, Araraquara, São Paulo, Brazil

Correspondence Address:
Walison A Vasconcellos
Rua Nova Ponte 148, 30550-720 Belo Horizonte, MG
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0972-4052.34000

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This study aimed to evaluate the tensile bond strength of adhesive systems in abraded enamel and deep dentin of the occlusal surface of forty human molar teeth. Enamel surfaces as well as the rest of the teeth were coated with epoxy resin and regularized and polished with silicon carbide sandpapers. The 40 teeth were randomized into eight groups of five teeth per group. Four groups were assigned to have deep dentin as the dental substrate and the other four had abraded enamel as the substrate for the adhesives to be tested. The adhesives being tested were the total etching Single Bond: SB, the self-etching Clearfil SE bond: CSEB, self-etching One Up Bond F: OUBF and the self-etching Self-Etch Bond: SEB adhesives. The samples (teeth) were restored with composite resin and subjected to a traction assay. The results were statistically analyzed using the ANOVA and TUKEY tests. The total etching SB adhesive system had the greatest bonding strength of all the adhesives tested, on both dental substrates (20.1 MegaPascals (MPa) on abraded enamel and 19.4 MPa on deep dentin). Of the self-etching dental adhesives tested, CSEB had the greatest bonding strength on both substrates (14.6 MPa on abraded enamel and 15.4 MPa on deep dentin). Both OUBF (11.0 MPa for enamel, 13.1 MPa for dentin) and SEB (10.2 MPa for enamel, 12.6 MPa for dentin) showed comparable bonding strengths without any significant differences for either substrate Thus, the total etching SB adhesive system had better bonding strength than the other self-etching adhesives used, regardless of the dental substrate to which the adhesives had been bonded.

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