Can the hydrophilicity of functional monomers affect chemical interaction?

V. P. Feitosa, F. A. Ogliari, B. Van Meerbeek, T. F. Watson, K. Yoshihara, A. O. Ogliari, M. A. Sinhoreti, A. B. Correr, G. Cama, S. Sauro

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48 Citations (Scopus)

Abstract

The number of carbon atoms and/or ester/polyether groups in spacer chains may influence the interaction of functional monomers with calcium and dentin. The present study assessed the chemical interaction and bond strength of 5 standard-synthesized phosphoric-acid ester functional monomers with different spacer chain characteristics, by atomic absorption spectroscopy (AAS), ATR-FTIR, thin-film x-ray diffraction (TF-XRD), scanning electron microscopy (SEM), and microtensile bond strength (μTBS). The tested functional monomers were 2-MEP (two-carbon spacer chain), 10-MDP (10-carbon), 12-MDDP (12-carbon), MTEP (more hydrophilic polyether spacer chain), and CAP-P (intermediate hydrophilicity ester spacer). The intensity of monomer-calcium salt formation measured by AAS differed in the order of 12-MDDP=10-MDP>CAP-P>MTEP>2-MEP. FTIR and SEM analyses of monomer-treated dentin surfaces showed resistance to rinsing for all monomer-dentin bonds, except with 2-MEP. TF-XRD confirmed the weaker interaction of 2-MEP. Highest μTBS was observed for 12-MDDP and 10-MDP. A shorter spacer chain (2-MEP) of phosphate functional monomers induced formation of unstable monomer-calcium salts, and lower chemical interaction and dentin bond strength. The presence of ester or ether groups within longer spacer carbon chains (CAP-P and MTEP) may affect the hydrophilicity, μTBS, and also the formation of monomer-calcium salts.

Original languageEnglish
Pages (from-to)201-206
Number of pages6
JournalJournal of dental research
Volume93
Issue number2
DOIs
Publication statusPublished - Feb 1 2014

Keywords

  • adhesives
  • bonding
  • dentin
  • electron microscopy
  • methacrylates
  • restorative dentistry

ASJC Scopus subject areas

  • Dentistry(all)

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  • Cite this

    Feitosa, V. P., Ogliari, F. A., Van Meerbeek, B., Watson, T. F., Yoshihara, K., Ogliari, A. O., Sinhoreti, M. A., Correr, A. B., Cama, G., & Sauro, S. (2014). Can the hydrophilicity of functional monomers affect chemical interaction? Journal of dental research, 93(2), 201-206. https://doi.org/10.1177/0022034513514587