Effect of air-drying on the solvent evaporation, degree of conversion and water sorption/solubility of dental adhesive models

Autor(es)

Bail, M. ^{[1, 2]} ; Malacarne-Zanon, J. ^[3] ; Silva, S. M. A. ^[4] ; Anauate-Netto, A. ^[5] ; Nascimento, F. D. ^[5] ; Amore, R. ^[5] ; Lewgoy, H. ^[5] ; Pashley, D. H. ^[6] ; Carrilho, M. R. ^[5]

Afiliação do(s) autor(es)

^[1] Univ Estadual Ponta Grossa, Dept Dent, Ponta Grossa, PR - Brazil

^[2] Univ Estadual Campinas, Dent Mat Area, Dept Restorat Dent, Piracicaba Sch Dent, Piracicaba, SP - Brazil

^[3] Univ Espirito Santo, Dept Prosthodont, Dent Mat Area, Sch Dent, Vitoria, ES - Brazil

^[4] Coll Hlth & Agr Sci UNIME, Lauro De Freitas, BA - Brazil

^[5] UNIBAN ANHANGUERA, Biomat Res Grp, Sao Paulo - Brazil

^[6] Georgia Hlth Sci Univ, Dept Oral Biol, Coll Dent Med, Augusta, GA - USA

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE; v. 23, n. 3, p. 629-638, MAR 2012.
• Citações Web of Science: 13

Resumo

This study evaluated protocols to eliminate acetone from dental adhesives and their effect on the kinetic of water sorption and percent of conversion of these adhesives. Experimental methacrylate-based adhesives with increasing hydrophilicity (R2, R3, R5) were used as reference materials. Primer-like solutions were prepared by addition of 50 wt% acetone. Acetone elimination was measured gravimetrically before and after: a spontaneous evaporation, an application of air-drying at room temperature or application of 40 degrees C air-drying. Protocols were performed from 15 to 60 s. Specimens of adhesive/acetone mixtures were photo-activated and tested for degree of conversion, water sorption and solubility. Data were analyzed by ANOVA and Bonferroni's tests (alpha = 0.05). Complete acetone elimination was never achieved, but it was significantly greater after the 40 degrees C air-drying application. Higher acetone elimination was observed for the least hydrophilic adhesive. Longer periods for acetone evaporation and heated air-stream can optimize polymerization and reduce the water sorption/solubility of adhesive system models. (AU)

• Processo FAPESP: 07/54618-4 - Avaliação da atividade de colagenases na degradação da dentina humana tratada por procedimentos restauradores adesivos
• Beneficiário: Marcela Rocha de Oliveira Carrilho
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores