Development of MDP-based one-step self-etch adhesive -effect of additional 4-META on bonding performance-

Hitoshi Iwai, Kou Fujita, Hirotoshi Iwai, Takuji Ikemi, Haruhiko Goto, Masahiro Aida, Norihiro Nishiyama

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


We designed three experimental 10-methacryloyloxydecyl dihydrogen phosphate (MDP)-based one-step (EX) adhesives consisting of MDP, urethane dimethacrylate, and triethylene glycol dimethacrylate adhesives with different water contents (98.4, 196.8, and 294.4 mg/g), and 4-methacryloyloxyethyl trimellitic anhydride (4-META) or 2-hydroxyethyl methacrylate (HEMA)-containing onestep adhesive. The effect of the amount of MDP-calcium (MDP-Ca) salt produced through demineralization of enamel and dentin on the bonding performance was examined. The efficacy of 4-META and HEMA was then discussed. When the amount of water in EX adhesive was increased, the production amount of MDP-Ca salt of enamel increased, but not the dentin. The enamel bond strength slightly increased with increasing the production amount of MDP-Ca salt, in contrast to the dentin. However, addition of 4-META in the EX adhesive (water content=98.4 mg/g) increased both bond strengths, although the production amounts of MDP-Ca salt significantly decreased. The 4-META enhances both bond strengths more effectively than the HEMA.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalDental Materials Journal
Issue number1
Publication statusPublished - 2013


  • Bond strength
  • Calcium salt of MDP
  • Demineralization efficacy
  • One-step adhesive


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