Effect of airborne-particle abrasion on dentin with experimental niobophosphate bioactive glass on the microtensile bond strength of resin cements.

Edilausson Moreno Carvalho, Darlon Martins Lima, Ceci Nunes Carvalho, Alessandro Dourado Loguercio, José Roberto Martinelli, José Bauer

Journal: Journal of prosthodontic research 2016;59(2):129-35

PMID: 25659301

Full Text on Elsevier Science View on PubMed

Abstract

PURPOSE

The objective of this study was to evaluate the microtensile bond strength (μTBS) of two resin cements bonded to dentin pre-treated with experimental niobophosphate bioactive glass (NBG).

METHODS

The experimental bioactive glass was prepared by mixing different amounts of NbO5; (NH4)2HP4; CaO; Na2CO3. The particle size distribution and composition of the bioactive glass powder were determined. Twenty flat dentin surfaces from sound extracted human molars were polished with 600-grit SiC paper and air-abraded using experimental bioactive glass niobium powder. The bonding procedures were accomplished by the application of two resin cements: self-etching Panavia F or self-adhesive RelyX U-100. The resin-bonded specimens were cut and the μTBS test was performed after 24h. The failure mode was determined with a stereomicroscope at 40× magnification. The results were statistically analyzed by two-way ANOVA and Tukey tests (α=0.05).

RESULTS

The two-way ANOVA did not detect interactions between factors, but only a difference between the self-etching and self-adhesive cement (p=0.001). The self-etching resin cement Panavia F obtained a higher μTBS than the self-adhesive cement Relyx U-100. The predominant failure mode of the cements was adhesive/mixed between the resin cement and dentin.

CONCLUSION

A new bioactive glass containing niobium did not interfere with the immediate bonding performance of self-etching and self-adhesive cements.

Address: Department of Dentistry I, School of Dentistry, University Federal of Maranhão (UFMA), Av. dos Portugueses, s/n, 65085680 São Luis, Maranhão, Brazil.; Department of Restorative Dentistry, School of Dentistry, University Ceuma (UNICEUMA), Josué Montello, 01, Renascença II, 65075120 São Luis, Maranhão, Brazil.; Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa (UEPG), Av. General Carlos Cavalcanti, 4748, Bloco M, Sala 64A, 84030900 Ponta Grossa, Paraná, Brazil.; Center of Materials Science and Technology, Energy and Nuclear Research Institute (IPEN), Av. Lineu Prestes, 2242, Cidade Universitaria, 05588900 São Paulo, SP, Brazil.; Department of Dentistry I, School of Dentistry, University Federal of Maranhão (UFMA), Av. dos Portugueses, s/n, 65085680 São Luis, Maranhão, Brazil. Electronic address: [email protected].

DOI: 10.1016/j.jpor.2015.01.001

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MeSH Terms: Air Abrasion, Dental, Dental Bonding, Dentin, Glass, Humans, Particle Size, Phosphates, Resin Cements, Resins, Synthetic, Tensile Strength