Bond Strength of Two Resin Cements on Dentin Using Different Cementation Strategies


Autoria(s): Melo, Renata Marques; Ozcan, Mutlu; Barbosa, Silvia Helena; Galhano, Graziela A. P.; Amaral, Regina; Bottino, Marco Antonio; Valandro, Luiz Felipe
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

20/05/2014

20/05/2014

01/01/2010

Resumo

Purpose:This study evaluated the microtensile bond strength of two resin cements to dentin either with their corresponding self-etching adhesives or employing the three-step etch-and-rinse technique. The null hypothesis was that the etch-and-rinse adhesive system would generate higher bond strengths than the self-etching adhesives.Materials and Methods:Thirty-two human molars were randomly divided into four groups (N = 32, n = 8/per group): G1) ED Primer self-etching adhesive + Panavia F; G2) All-Bond 2 etch-and-rinse adhesive + Panavia F; G3) Multilink primer A/B self-etching adhesive + Multilink resin cement; G4) All-Bond 2 + Multilink. After cementation of composite resin blocks (5 x 5 x 4 mm), the specimens were stored in water (37 degrees C, 24 hours), and sectioned to obtain beams (+/- 1 mm2 of adhesive area) to be submitted to microtensile test. The data were analyzed using 2-way analysis of variance and Tukey's test (alpha = 0.05).Results:Although the cement type did not significantly affect the results (p = 0.35), a significant effect of the adhesive system (p = 0.0001) was found on the bond strength results. Interaction terms were not significant (p = 0.88751). The etch-and-rinse adhesive provided significantly higher bond strength values (MPa) with both resin cements (G2: 34.4 +/- 10.6; G4: 33.0 +/- 8.9) compared to the self-etching adhesive systems (G1: 19.8 +/- 6.6; G3: 17.8 +/- 7.2) (p < 0.0001). Pretest failures were more frequent in the groups where self-etching systems were used.Conclusion:Although the cement type did not affect the results, there was a significant effect of changing the bonding strategy. The use of the three-step etch-and-rinse adhesive resulted in significantly higher bond strength for both resin cements on dentin.CLINICAL SIGNIFICANCEDual polymerized resin cements tested could deliver higher bond strength to dentin in combination with etch-and-rinse adhesive systems as opposed to their use in combination with self-etching adhesives.(J Esthet Restor Dent 22:262-269, 2010).

Formato

262-268

Identificador

http://dx.doi.org/10.1111/j.1708-8240.2010.00349.x

Journal of Esthetic and Restorative Dentistry. Malden: Wiley-blackwell, v. 22, n. 4, p. 262-268, 2010.

1496-4155

http://hdl.handle.net/11449/22818

10.1111/j.1708-8240.2010.00349.x

WOS:000280644400011

Idioma(s)

eng

Publicador

Wiley-Blackwell

Relação

Journal of Esthetic and Restorative Dentistry

Direitos

closedAccess

Tipo

info:eu-repo/semantics/article