Dentin bond strength of a fluoride-releasing adhesive system submitted to pH-cycling

Ana Rosa Costa, Lourenço Correr-Sobrinho, Glaucia Maria Bovi Ambrosano, Mario Alexandre Coelho Sinhoreti, Gilberto Antonio Borges, Jeffrey A. Platt, Regina Maria Puppin-Rontani

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

To evaluate the microtensile bond strength (μTBS) of a fluoride-containing adhesive system submitted to a pH-cycling and storage time regimen for primary outcomes. As secondary outcomes the fluoride released amount was evaluated. Twelve dentin surfaces from sound third molar were divided into 2 groups according to adhesive systems: Clearfil SE Protect (PB) and Clearfil SE Bond (SE). Sticks obtained (1.0 mm2) from teeth were randomly divided into 3 subgroups according to storage regimen model: immediate (24h); 5-month deionized water (W); and pH-cycling model (C). All sticks were tested for μTBS in a universal testing machine. Fluoride concentration was obtained from 1-4 days and 30-day in W and 1-4 days in demineralization (DE)/remineralization (RE) solutions from C, using a fluoride-specific electrode. μTBS and fluoride released data were, respectively, submitted to ANOVA in a split plot design and Tukey, and Friedman’ tests (α=0.05). There was no significant interaction between adhesive system and storage regimen for μTBS. W showed the lowest μTBS values. There was no significant difference between 24 h and C models for μTBS. There was no significant difference between adhesive systems. Failure mode was predominantly cohesive within composite for the 24 h and W, for the C group it was mixed for SE and cohesive within composite for PB adhesive system. Fluoride concentrations in the DE/RE solutions were less than 0.03125 ppm and not detected in W. In conclusion, the fluoride-containing adhesive system performed similarly to the regular one. Hydrolytic degradation is the main problem with both adhesive systems, regardless of fluoride contents.

Original languageEnglish (US)
Pages (from-to)472-478
Number of pages7
JournalBrazilian dental journal
Volume25
Issue number6
DOIs
StatePublished - Jan 1 2014

Keywords

  • Fluoride release
  • Hydrolytic degradation
  • Microtensile
  • Self-etched adhesive systems
  • pH-cycling

ASJC Scopus subject areas

  • Dentistry(all)

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    Costa, A. R., Correr-Sobrinho, L., Maria Bovi Ambrosano, G., Alexandre Coelho Sinhoreti, M., Borges, G. A., Platt, J. A., & Puppin-Rontani, R. M. (2014). Dentin bond strength of a fluoride-releasing adhesive system submitted to pH-cycling. Brazilian dental journal, 25(6), 472-478. https://doi.org/10.1590/0103-6440201302445