http://www.cnr.it/ontology/cnr/individuo/prodotto/ID27627

Effects of ethanol addition on the water sorption/solubility and percent conversion of comonomers in model dental adhesives. (Articolo in rivista)

Type

Articolo in rivista (Classe)
Prodotto della ricerca (Classe)

Label

Effects of ethanol addition on the water sorption/solubility and percent conversion of comonomers in model dental adhesives. (Articolo in rivista) (literal)

Anno

2009-01-01T00:00:00+01:00 (literal)

Alternative label

Malacarne-Zanon J, Pashley DH, Agee KA, Foulger S, Alves MC, Breschi L, Cadenaro M, Garcia FP, Carrilho MR. (2009)
Effects of ethanol addition on the water sorption/solubility and percent conversion of comonomers in model dental adhesives.
in Dental materials
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Malacarne-Zanon J, Pashley DH, Agee KA, Foulger S, Alves MC, Breschi L, Cadenaro M, Garcia FP, Carrilho MR. (literal)

Pagina inizio

1275 (literal)

Pagina fine

1284 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

25 (literal)

Rivista

Dental materials (Rivista)

Note

ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

Department of Restorative Dentistry, Dental Materials, Piracicaba School of Dentistry, University of Campinas, Piracicaba, SP, Brazil; Department of Oral Biology, School of Dentistry, Medical College of Georgia, Augusta, GA, USA; Department of Materials Sciences, Clemson University, Clemson, SC, USA; Department of Oral Diagnosis, Bucal Dental Biology, Piracicaba School of Dentistry, University of Campinas, Piracicaba, SP, Brazil; Department of Biomedicine, Unit of Dental Sciences and Biomaterials, University of Trieste, Trieste, Italy; IGM-CNR, Unit of Bologna c/o IOR, Bologna, Italy; Department of Restorative Dentistry, School of Dentistry, University of Brasília, Brasília, Brazil; Department of Restorative Dentistry - GEO, Bandeirante University of Sao Paulo, School of Dentistry, São Paulo, SP, Brazil. (literal)

Titolo

Effects of ethanol addition on the water sorption/solubility and percent conversion of comonomers in model dental adhesives. (literal)

Abstract

OBJECTIVES: This study evaluated the kinetics of water uptake and percent conversion in neat versus ethanol-solvated resins that were formulated to be used as dental bonding agents. METHODS: Five methacrylate-based resins of known and increasing hydrophilicities (R1, R2, R3, R4 and R5) were used as reference materials. Resins were evaluated as neat bonding agents (100% resin) or they were solvated with absolute ethanol (95% resin/5% ethanol or 85% resin/15% ethanol). Specimens were prepared by dispensing the uncured resin into a circular mold (5.8 mm x 0.8 mm). Photo-activation was performed for 80s. The water sorption/diffusion/solubility was gravimetrically evaluated, while the degree of conversion (DC) was calculated by Fourier-transform infrared spectroscopy. RESULTS: Water sorption increased with the hydrophilicity of the resin blends. In general, the solvated resins exhibited significantly higher water sorption, solubility and water diffusion coefficients when compared to their corresponding neat versions (p<0.05). The only exception was resin R1, the least hydrophilic resin, in which neat and solvated versions exhibited similar water sorption (p>0.05). Addition of ethanol increased the DC of all resins tested, especially of the least hydrophilic, R1 and R2 (p<0.05). Despite the increased DC of ethanol-solvated methacrylate-based resins, it occurs at the expense of an increase in their water sorption/diffusion and solubility values. SIGNIFICANCE: Negative effects of residual ethanol on water sorption/solubility appeared to be greater as the hydrophilicity of the resin blends increased. That is, the use of less hydrophilic resins in dental adhesives may create more reliable and durable bonds to dentin (literal)

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