Incorporation of a hydrophilic amide monomer into a one-step self-etch adhesive to increase dentin bond strength: Effect of application time

Yusuke Kuno, Keiichi Hosaka*, Masatoshi Nakajima, Masaomi Ikeda, Celso Afonso Klein, Richard M. Foxton, Junji Tagami

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


The purpose was to evaluate the effect of a hydrophilic amide monomer on μTBS of one-step adhesive to dentin at different application times. Clearfil Universal Bond Quick (UBQ), experimental adhesive (UBQexp; same compositions as UBQ but hydrophilic amide monomer was replaced with 2-hydroxyethyl methacrylate), Clearfil SE ONE and Clearfil SE Bond were applied to midcoronal dentin prepared with 600-grit SiC at different application time (0, 10, 20 and 40 s). Water sorption (Wsp) and the ultimate tensile strength (UTS) of polymerized adhesives were also measured. UBQ showed significantly lower Wsp and higher UTS than UBQexp. At each application time, UBQ exhibited significantly higher μTBSs than UBQexp. UBQ showed the highest μTBS at 0 s application time among all the adhesives. When the application time was prolonged from 0 s to 10 s, only UBQ showed no significant difference. The hydrophilic amide monomer increased µTBS with reduction in Wsp and increase in the UTS and may allow a shortened application time.

Original languageEnglish
Pages (from-to)892-899
Number of pages8
JournalDental Materials Journal
Issue number6
Publication statusPublished - 1 Jan 2019


  • Application time
  • Hydrophilic amide monomer
  • Micro-tensile bond strength
  • Self-etch adhesive systems

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