Electrical properties of resin monomers used in restorative dentistry

Marco Breschi, Davide Fabiani, Leonardo Sandrolini, Martino Colonna, Laura Sisti, Micaela Vannini, Annalisa Mazzoni, Alessandra Ruggeri, David Henry Pashley, Lorenzo Breschi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Objectives: The application of an electric field has been shown to positively influence the impregnation of the resin monomers currently used in dentin bonding systems during hybrid layer formation. This study presents an experimental characterization of the electrical properties of these monomers with the aim of both correlating them to their chemical structures and seeking an insight into the mechanisms of the monomer migration under an applied electric field. Methods: Some common monomers examined were TEGDMA (triethyleneglycoldimethacrylate), HEMA (2-hydroxyethyl methacrylate), UDMA (urethane dimethacrylate), 2-MP (bis[2-(methacryloyloxy)ethyl] phosphate, TCDM di(hydroxyethyl methacrylate) ester of 5-(2,5-dioxotetrahydrofurfuryl)-3-methyl- 3-cyclohexenyl-1,2-dicarboxylic anhydride) and Bis-GMA [2,2-bis(4-2-hydroxy-3- methacryloyloxypropoxyphenyl)propane]. A customized cell produced for the measurement of the electrical properties of monomers was manufactured and electrical conductivity and permittivity of resin monomers were measured. Results: The permittivity of the tested monomers is largely affected by electrical frequency. The large values of permittivity and dielectric losses observed as frequency decreased, indicate a dominant effect of ionic polarization, particularly evident in materials showing the highest conductivity. Permittivity and conductivity of the tested monomers showed a similar behavior, i.e. materials with the lowest permittivity also show small values of conductivity and vice versa. Significance: The results of the present study revealed a good correlation between electrical properties and Hoy solubility parameters and, in particular, the higher the polar contribution (polar forces plus hydrogen bonding) the higher the permittivity and conductivity. The most relevant outcome of this study is that the electrophoretic mechanism prevails on the electroendoosmotic effect in determining the monomer migration under the application of electric fields.

Original languageEnglish (US)
Pages (from-to)1024-1031
Number of pages8
JournalDental Materials
Volume28
Issue number9
DOIs
StatePublished - Sep 1 2012

Fingerprint

Dentistry
Electric properties
Resins
Monomers
Bisphenol A-Glycidyl Methacrylate
Propane
Electric Conductivity
Anhydrides
Permittivity
Dentin
Hydrogen Bonding
Solubility
Esters
Outcome Assessment (Health Care)
Electric fields
hydroxyethyl methacrylate
Dielectric losses
Hybrid systems
Impregnation
Hydrogen bonds

Keywords

  • Composite resins
  • Dentin bonding systems
  • Electrical conductivity
  • Electrical permittivity

ASJC Scopus subject areas

  • Materials Science(all)
  • Dentistry(all)
  • Mechanics of Materials

Cite this

Breschi, M., Fabiani, D., Sandrolini, L., Colonna, M., Sisti, L., Vannini, M., ... Breschi, L. (2012). Electrical properties of resin monomers used in restorative dentistry. Dental Materials, 28(9), 1024-1031. https://doi.org/10.1016/j.dental.2012.05.009

Electrical properties of resin monomers used in restorative dentistry. / Breschi, Marco; Fabiani, Davide; Sandrolini, Leonardo; Colonna, Martino; Sisti, Laura; Vannini, Micaela; Mazzoni, Annalisa; Ruggeri, Alessandra; Pashley, David Henry; Breschi, Lorenzo.

In: Dental Materials, Vol. 28, No. 9, 01.09.2012, p. 1024-1031.

Research output: Contribution to journalArticle

Breschi, M, Fabiani, D, Sandrolini, L, Colonna, M, Sisti, L, Vannini, M, Mazzoni, A, Ruggeri, A, Pashley, DH & Breschi, L 2012, 'Electrical properties of resin monomers used in restorative dentistry', Dental Materials, vol. 28, no. 9, pp. 1024-1031. https://doi.org/10.1016/j.dental.2012.05.009
Breschi M, Fabiani D, Sandrolini L, Colonna M, Sisti L, Vannini M et al. Electrical properties of resin monomers used in restorative dentistry. Dental Materials. 2012 Sep 1;28(9):1024-1031. https://doi.org/10.1016/j.dental.2012.05.009
Breschi, Marco ; Fabiani, Davide ; Sandrolini, Leonardo ; Colonna, Martino ; Sisti, Laura ; Vannini, Micaela ; Mazzoni, Annalisa ; Ruggeri, Alessandra ; Pashley, David Henry ; Breschi, Lorenzo. / Electrical properties of resin monomers used in restorative dentistry. In: Dental Materials. 2012 ; Vol. 28, No. 9. pp. 1024-1031.
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abstract = "Objectives: The application of an electric field has been shown to positively influence the impregnation of the resin monomers currently used in dentin bonding systems during hybrid layer formation. This study presents an experimental characterization of the electrical properties of these monomers with the aim of both correlating them to their chemical structures and seeking an insight into the mechanisms of the monomer migration under an applied electric field. Methods: Some common monomers examined were TEGDMA (triethyleneglycoldimethacrylate), HEMA (2-hydroxyethyl methacrylate), UDMA (urethane dimethacrylate), 2-MP (bis[2-(methacryloyloxy)ethyl] phosphate, TCDM di(hydroxyethyl methacrylate) ester of 5-(2,5-dioxotetrahydrofurfuryl)-3-methyl- 3-cyclohexenyl-1,2-dicarboxylic anhydride) and Bis-GMA [2,2-bis(4-2-hydroxy-3- methacryloyloxypropoxyphenyl)propane]. A customized cell produced for the measurement of the electrical properties of monomers was manufactured and electrical conductivity and permittivity of resin monomers were measured. Results: The permittivity of the tested monomers is largely affected by electrical frequency. The large values of permittivity and dielectric losses observed as frequency decreased, indicate a dominant effect of ionic polarization, particularly evident in materials showing the highest conductivity. Permittivity and conductivity of the tested monomers showed a similar behavior, i.e. materials with the lowest permittivity also show small values of conductivity and vice versa. Significance: The results of the present study revealed a good correlation between electrical properties and Hoy solubility parameters and, in particular, the higher the polar contribution (polar forces plus hydrogen bonding) the higher the permittivity and conductivity. The most relevant outcome of this study is that the electrophoretic mechanism prevails on the electroendoosmotic effect in determining the monomer migration under the application of electric fields.",
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AU - Vannini, Micaela

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