Enamel and Dentin Bond Strength, Interfacial Ultramorphology and Fluoride Ion Release of Self-etching Adhesives During a pH-cycling Regime

Autor(es)

Pinto, Cristiane Franco ^[1] ; Vermelho, Paulo Moreira ^[2] ; Aguiar, Thaiane Rodrigues ^[3] ; Paes Leme, Adriana Franco ^[4] ; de Oliveira, Marcelo Tavares ^[5] ; de Souza, Evelise Machado ^[6] ; Cavalli, Vanessa ^[7] ; Giannini, Marcelo ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Francisco, BR-12900000 Braganca Paulista, SP - Brazil

^[2] Univ Estadual Campinas, Piracicaba Sch Dent, Piracicaba, SP - Brazil

^[3] Univ Illinois, Coll Dent, Dept Restorat Dent, Chicago, IL - USA

^[4] Brazilian Synchrotron Light Lab, Ctr Struct Mol Biol, Campinas, SP - Brazil

^[5] UNINOVE Univ, Sch Dent, Sao Paulo, SP - Brazil

^[6] Pontificia Univ Catolica Parana, Sch Hlth & Biosci, Grad Program Dent, Curitiba, PR - Brazil

^[7] Sao Leopoldo Mandic Inst & Res Ctr, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Adhesive Dentistry; v. 17, n. 1, p. 27-34, 2015.
• Citações Web of Science: 4

Resumo

Purpose: This study evaluated the effects of pH cycling on fluoride release and bond strength of two self-etching adhesive systems to both enamel and dentin. The ultramorphology of the interfaces produced by the adhesive systems were also analyzed. Materials and Methods: The buccal surfaces of bovine incisors were flattened to expose enamel and dentin, which were bonded with either Clearfil Protect Bond (CPB) or One-Up Bond F Plus (OBP). The bonded samples were prepared for microtensile bond strength (mu TBS) testing, fluoride ion release, and transmission electron microscopy. pH cycling comprised demineralization (8 h/day) and remineralization (16 h/day) cycles for 8 days. The mu TBS data were analyzed by two-way ANOVA, while fluoride release was analyzed using the Friedman and Wilcoxon tests. Results: The adhesives presented similar bond strengths to enamel. However, the dentin bond strength of CPB was higher than that of OBP. pH cycling did not influence enamel or dentin mu TBS. The amount of fluoride released from the bonded enamel and dentin was low and varied among the groups. The morphological evaluation showed that the thickness of the dentin hybrid layers was similar for both adhesives. Conclusion: The pH-cycling regime did not affect enamel or dentin bond strengths. In enamel, both the self-etching adhesives tested presented similar bond strengths, but in dentin, Clearfil Protect Bond showed higher dentin bonding than One-Up Bond F Plus. (AU)

• Processo FAPESP: 06/53828-2 - Analise da uniao e dos tecidos dentais (esmalte/dentina) adjacentes as restauracoes com sistemas adesivos contendo fluoreto apos desafios cariogenicos in situ e in vitro.
• Beneficiário: Cristiane Franco Pinto
• Modalidade de apoio: Bolsas no Brasil - Doutorado