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|Type:||Artigo de periódico|
|Title:||Dentin Bond Strength Of A Fluoride-releasing Adhesive System Submitted To Ph-cycling|
Maria Bovi Ambrosano G.
Alexandre Coelho Sinhoreti M.
|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.|
|Editor:||Associacao Brasileira de Divulgacao Cientifica|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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