Analysis of chemical interaction of 4-MET with hydroxyapatite using XPS

Kouji Nagakane, Yasuhiro Yoshida, Isao Hirata, Ryuichi Fukuda, Youichi Nakayama, Kenichi Shirai, Tatsuyuki Ogawa, Kazuomi Suzuki, Bart Van Meerbeek, Masayuki Okazaki


59 被引用数 (Scopus)


Each dental adhesive contains a specific functional monomer that determines its actual adhesive performance to tooth tissue. 4-methacryloxyethyl trimellitic acid (4-MET) is well-known as one of the functional monomers mostly available and consequently widely used in commercial adhesives. We therefore characterized the chemical interaction of 4-MET with hydroxyapatite (HAp) using X-ray Photoelectron Spectroscopy (XPS). XPS revealed that the peak representing -COO- of 4-MET shifted to a lower binding energy, when 4-MET was adsorbed onto HAp. Deconvolution of this shifted peak disclosed two components with a peak representing unreacted carboxyl groups and ester groups, and a peak suggesting chemical bonding of other carboxyl groups to Ca of HAp. XPS spectra of HAp treated with 4-MET also disclosed the surface to be enriched in calcium and decreased in phosphorus, indicating that phosphorus was extracted at a relatively higher rate than calcium. It can thus be concluded that true chemical bonding of 4-MET with calcium present in HAp occurred, as it was proven using XPS.

ジャーナルDental materials journal
出版ステータスPublished - 12月 2006

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 歯科学(全般)


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