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X‐Ray absorption fine structure analysis of the local environment of zinc in dentine treated with zinc compounds
Author(s) -
Takatsuka Tsutomu,
Hirano Junko,
Matsumoto Hitoshi,
Honma Tetsuo
Publication year - 2005
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.2005.00194.x
Subject(s) - zinc , xanes , x ray absorption fine structure , extended x ray absorption fine structure , absorption (acoustics) , chloride , chemistry , demineralization , absorption spectroscopy , nuclear chemistry , inorganic chemistry , crystallography , materials science , spectral line , spectroscopy , enamel paint , composite material , organic chemistry , optics , physics , quantum mechanics , astronomy
It has been reported that zinc oxide (ZnO) inhibits dentine demineralization. By using the X‐ray absorption fine structure (XAFS) technique, our aims in this study were to provide information about the local environment of zinc atoms in dentine that had been treated with zinc compounds. We measured the Zn K‐edge X‐ray absorption near‐edge structure (XANES) and the extended X‐ray absorption fine structure (EXAFS) of dentine specimens treated with zinc chloride or ZnO. In XAFS analyses, the spectra of dentine specimens treated with ZnO (D‐ZO) or with zinc chloride (D‐ZC) were similar and obviously different from the reference ZnO spectrum. This suggests that most of the zinc atoms detected in D‐ZO are not derived from particles of ZnO. The spectra of D‐ZO and D‐ZC were similar to the spectrum of the synthetic, zinc‐containing hydroxyapatite, but were not similar to that of zinc in ZnCl 2 ‐treated collagen. The results of this study suggest that most of the zinc atoms detected were attached to hydroxyapatite and not to collagen.