Surface conditioning of a composite used for inlay/onlay restorations: Effect on mu TBS to resin cement


Autoria(s): Valandro, Luiz Felipe; Pelogia, Fernanda; Galhano, Graziela; Bottino, Marco Antonio; Mallmannd, Andre
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

20/05/2014

20/05/2014

01/12/2007

Resumo

Purpose: To assess the effect of the composite surface conditioning on the microtensile bond strength of a resin cement to a composite used for inlay/onlay restorations.Materials and Methods: Forty-two blocks (6 x 6 x 4 mm) of a microfilled composite (Vita VMLC) were produced and divided into 3 groups (N = 14) by composite surface conditioning methods: Gr1 - etching with 37% phosphoric acid, washing, drying, silanization; Gr2 - air abrasion with 50-Im Al203 particles, silanization; Gr3 - chairside tribochemiCal silica coating (CoJet System), silanization. Single-Bond (one-step adhesive) was applied on the conditioned surfaces and the two resin blocks treated with the same method were cemented using RelyX ARC (dual-curing resin cement). The specimens were stored for 7 days in water at 37 degrees C and then sectioned to produce nontrimmed beam samples, which were submitted to microtensile bond strength testing (mu TBS). For statistical analysis (one-way ANOVA and Tukey's test, = 0.05), the means of the beam samples from each luted specimen were calculated (n = 7).Results: mu TBS values (MPa) of Gr2 (62.0 +/- 3.9a) and Gr3 (60.5 +/- 7.9a) were statistically similar to each other and higher than Gr1 (38.2 +/- 8.9b). The analysis of the fractured surfaces revealed that all failures occurred at the adhesive zone.Conclusion: Conditioning methods with 50-Im Al203 or tribochemical silica coating allowed bonding between resin and composite that was statistically similar and stronger than conditioning with acid etching.

Formato

495-498

Identificador

http://dx.doi.org/10.3290/j.jad.a12896

Journal of Adhesive Dentistry. Hanover Park: Quintessence Publishing Co Inc., v. 9, n. 6, p. 495-498, 2007.

1461-5185

http://hdl.handle.net/11449/36814

10.3290/j.jad.a12896

WOS:000251741800002

Idioma(s)

eng

Publicador

Quintessence Publishing Co Inc

Relação

Journal of Adhesive Dentistry

Direitos

closedAccess

Palavras-Chave #composite #inlay #surface conditioning #microtensile bond strength #tribochemical silica coating
Tipo

info:eu-repo/semantics/article