Interference of functional monomers with polymerization efficiency of adhesives

Masao Hanabusa, Kumiko Yoshihara, Yasuhiro Yoshida, Takumi Okihara, Takatsugu Yamamoto, Yasuko Momoi, Bart Van Meerbeek

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The degree of conversion (DC) of camphorquinone/amine-based adhesives is affected by acidic functional monomers as a result of inactivation of the amine co-initiator through an acid-base reaction. During bonding, functional monomers of self-etch adhesives chemically interact with hydroxyapatite (HAp). Here, we tested in how far the latter interaction of functional monomers with HAp counteracts the expected reduction in DC of camphorquinone/amine-based adhesives. The DC of three experimental adhesive formulations, containing either of the two functional monomers [10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) or 4-methacryloxyethyl trimellitic acid anhydride (4-META)] or no functional monomer (no-FM; control), was measured with and without HAp powder added to the adhesive formulations. Both the variables 'functional monomer' and 'HAp' were found to be significant, with the functional monomer reducing the DC and HAp counteracting this effect. It is concluded that the functional monomers 10-MDP and 4-META interfere with the polymerization efficiency of adhesives. This interference is less prominent in the presence of HAp, which would clinically correspond to when these two functional monomers of the adhesive simultaneously interact with HAp in tooth tissue.

Original languageEnglish
Pages (from-to)204-209
Number of pages6
JournalEuropean Journal of Oral Sciences
Volume124
Issue number2
DOIs
Publication statusPublished - Apr 1 2016

Keywords

  • Adhesive
  • Degree of conversion
  • Fourier transform infrared
  • Functional monomer
  • Hardness

ASJC Scopus subject areas

  • Dentistry(all)

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  • Cite this

    Hanabusa, M., Yoshihara, K., Yoshida, Y., Okihara, T., Yamamoto, T., Momoi, Y., & Van Meerbeek, B. (2016). Interference of functional monomers with polymerization efficiency of adhesives. European Journal of Oral Sciences, 124(2), 204-209. https://doi.org/10.1111/eos.12245