Degree of Conversion of Simplified Contemporary Adhesive Systems as Influenced by Extended Air-Activated or Passive Solvent Volatilization Modes

Autor(es)

Borges, B. C. D. ^[1] ; Souza-Junior, E. J. ^[2] ; Brandt, W. C. ^[3] ; Loguercio, A. D. ^[4] ; Montes, M. A. J. R. ^[5] ; Puppin-Rontani, R. M. ; Sinhoreti, M. A. C. ^[6]

Afiliação do(s) autor(es)

^[1] Laureate Int Univ, Potiguar Univ, Dept Dent, Natal, RN - Brazil

^[2] State Univ Campinas UNICAMP, Piracicaba Dent Sch, Sao Paulo - Brazil

^[3] Univ Taubate, Dept Prosthodont, Sao Paulo - Brazil

^[4] Univ Estadual Ponta Grossa, Ponta Grossa - Brazil

^[5] Univ Pernambuco, Dept Restorat Dent, Recife, PE - Brazil

^[6] Univ Estadual Campinas, Piracicaba Dent Sch, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Operative Dentistry; v. 37, n. 3, p. 246-252, MAY-JUN 2012.
• Citações Web of Science: 15

Resumo

This study evaluated the effect of five methods of solvent volatilization on the degree of conversion (DC) of nine one-bottle adhesive systems using Fourier transform infrared/attenuated total reflectance (FTIR/ATR) analysis. Nine adhesives were tested: Adper Single Bond 2 (SB), Adper Easy One (EO), One Up Bond F Plus (OUP), One Coat Bond SL (OC), XP Bond (RP), Ambar (AM), Natural Bond (NB), GO, and Stae. The adhesive systems were applied to a zinc-selenide pellet and 1) cured without solvent volatilization, 2) left undisturbed for 10 seconds before curing, 3) left undisturbed for 60 seconds before curing, 4) air-dried with an air stream for 10 seconds before curing, and 5) air-dried with an air stream for 60 seconds before curing. FTIR/ATR spectra were obtained, and the DC was calculated by comparing the aliphatic bonds/reference peaks before and after light activation for 10 seconds (FlashLite 1401). The DC means of each material were analyzed by one-way analysis of variance and post hoc Tukey test (p<0.05). The DC of GO and Stae adhesive systems was not affected by the five evaporation conditions. Air-drying for 60 seconds before curing yielded the highest DC for SB, EO, and OC. Extended solvent volatilization time (60 seconds) either with or without air-drying before curing provided the highest DC for AM, NB, XP, and OUP. Thus, the monomer conversion of adhesive systems was material dependent. In general, the 60-second passive or active air-drying modes to volatilize solvents before curing enhanced the degree of conversion for the one-bottle simplified adhesive systems. (AU)

• Processo FAPESP: 07/02800-3 - Efeito do tipo e tempo de fotoativação no grau de conversão e liberação de monômeros não polimerizados de sistemas adesivos e compósitos dentais
• Beneficiário: Flávio Henrique Baggio Aguiar
• Modalidade de apoio: Auxílio à Pesquisa - Regular