NMR study on the demineralization mechanism of the enamel and dentin surfaces in MDP-based all-in-one adhesive

Kou Fujita-Nakajima, Naoko Aoki-Tabei, Akishi Arita, Norihiro Nishiyama

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The acidic monomers utilized in all-in-one adhesives play a key role in the enamel and dentin bonding performance. The purpose of this study is to investigate the mechanism by which 10-methacryloyloxydecyl dihydrogen phosphate (MDP) demineralizes the enamel and dentin surfaces prepared by a diamond bur in three types of experimental MDP-based all-in-one (EX) adhesives containing different amounts of water (46.6, 93.2 and 208.1 mg/g). The enamel and dentin reactants of EX adhesives were analyzed using solidstate phosphorous-31 nuclear magnetic resonance and X-ray diffraction. Increased amount of water led to increases in the efficacy by which MDP demineralizes the enamel and dentin surfaces. However, the rate of calcium salts of MDP produced slowed down at the water concentrations above 93.2 mg/g. The dentin yielded greater amounts of di-calcium salts of the MDP monomer and dimer than the enamel, which develops a different type of layered structure of MDP from the enamel.

Original languageEnglish
Article numberdmj/2017-292
Pages (from-to)693-701
Number of pages9
JournalDental Materials Journal
Volume37
Issue number4
DOIs
Publication statusPublished - 2018

Keywords

  • P NMR
  • All-in-one adhesive
  • Demineralization efficacy of MDP
  • MDP
  • MDP-Ca salt

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