Journal ArticleDOI
X-ray absorption fine structure analysis of the local environment of zinc in dentine treated with zinc compounds.
TLDR
The results of this study suggest that most of the zinc atoms detected in dentine specimens treated with ZnO were attached to hydroxyapatite and not to collagen.Abstract:
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 ZnCl2-treated collagen. The results of this study suggest that most of the zinc atoms detected were attached to hydroxyapatite and not to collagen.read more
Citations
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Journal ArticleDOI
Zinc incorporation into hydroxylapatite.
TL;DR: By theoretical modeling and X-ray absorption spectroscopy, the local coordination structure of Zn incorporated into hydroxylapatite was examined and results are consistent with the most favored DFT model for Zn substitution in the Ca2 site.
Journal ArticleDOI
Mechanism of incorporation of zinc into hydroxyapatite.
TL;DR: The atomic level mechanism of incorporation of Zn(2+) into hydroxyapatite (HAp), which is a potential dopant to promote bone formation, was investigated, based on first principles total energy calculations and experimental X-ray absorption near edge structure (XANES) analyses.
Journal ArticleDOI
Unexpected Mechanism of Zn2+ Insertion in Calcium Phosphate Bioceramics
TL;DR: In this article, the authors used X-ray powder diffraction patterns recorded from Zn-doped, Zn/Sr, and Zn codoped biphasic calcium phosphate (BCP) samples to locate Zn2+ cations in both hydroxyapatite (HAp) and β-tricalcium phosphate (β-TCP) phases heat-treated at 1100 °C.
Journal ArticleDOI
Fine structure study on low concentration zinc substituted hydroxyapatite nanoparticles
TL;DR: In this paper, the fine structure of zinc substituted hydroxyapatite was studied using experimental analysis and first-principles calculations, and it was found that the substitution energies are negative and lowest for inserting zinc between the two oxygen atoms along the hydroxyl column (c -axis).
References
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Journal ArticleDOI
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Lynne Regan,Neil D. Clarke +1 more
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A study of zinc in human teeth.
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Journal ArticleDOI
The Influence of the Organic Matrix on Demineralization of Bovine Root Dentin in vitro
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Journal ArticleDOI
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B. Klont,J.M. ten Cate +1 more
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