NMR study on the adhesion efficacy of experimental phosphonic acid monomers

Norihiro Nishiyama, Masahiro Aida, Kou Fujita, Kazuomi Suzukp, F. R. Tay, David H. Pashley, Kimiya Nemoto

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Three experimental self-etching primers -consisting of N-methacryloyl-to- aminoalkyl phosphonic acid (NMwP) with different methylene chain lengths and N-methacryloyl glycine (NMGIy) -were formulated. The influence of methylene chain length in NMwP derivatives on the chemical nature of calcium salts was examined following their application to tooth components. Bond strengths of experimental self-etching primers created with these monomers to enamel and dentin were also investigated. Nuclear magnetic resonance spectroscopy showed that NMwPs decalcified tooth components with formation of calcium salts, which changed from calcium hydrogen phosphonate to calcium phosphonate with increase in methylene chain length within the NMwP structure. Disparity in calcium salt formation was related to increases in bond strength to enamel from 18 to 24 MPa. However, bond strength to dentin remained unchanged (22 MPa). The relative dependency of bond strength on monomer methylene chain length was probably attributable to the sites where these NMwP calcium salts had deposited on the bonding substrates.

Original languageEnglish (US)
Pages (from-to)382-387
Number of pages6
JournalDental Materials Journal
Volume26
Issue number3
DOIs
StatePublished - May 2007

Keywords

  • Acid-base interaction
  • Self-etching primer

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)

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    Nishiyama, N., Aida, M., Fujita, K., Suzukp, K., Tay, F. R., Pashley, D. H., & Nemoto, K. (2007). NMR study on the adhesion efficacy of experimental phosphonic acid monomers. Dental Materials Journal, 26(3), 382-387. https://doi.org/10.4012/dmj.26.382