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Related Experiment Videos

Heterogeneous iron-containing fluoridated apatites

M Okazaki1, J Takahashi

  • 1Department of Dental Materials Science and Technology, Osaka University, Faculty of Dentistry, Japan.

Biomaterials
|January 1, 1997
PubMed
Summary
This summary is machine-generated.

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Two distinct iron-containing fluoridated hydroxyapatites were synthesized, exhibiting different crystal morphologies and solubilities. These findings suggest the formation of unique heterogeneous iron-containing fluoridated apatites with varying properties.

Area of Science:

  • Materials Science
  • Biomaterials Chemistry
  • Inorganic Chemistry

Background:

  • Hydroxyapatite is a key biomaterial, and its properties can be modified by incorporating elements like iron and fluoride.
  • Iron-doped hydroxyapatites are explored for various applications, including bone regeneration and drug delivery.
  • Fluorapatite, a related mineral, offers enhanced stability compared to hydroxyapatite.

Purpose of the Study:

  • To synthesize and characterize two types of heterogeneous iron-containing fluoridated hydroxyapatites (Fe-FeFAp and FeF-FeAp).
  • To investigate the influence of synthesis conditions on the structural, morphological, and solubility properties of these materials.
  • To determine if different synthesis pathways lead to distinct iron-containing fluoridated hydroxyapatite structures.

Main Methods:

Related Experiment Videos

  • Heterogeneous synthesis of iron-containing fluoridated hydroxyapatites in the presence of ferrous ions.
  • Utilizing fluoride-free and fluoride-containing solutions sequentially during synthesis.
  • Characterization using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS).
  • Solubility tests conducted at 37°C and pH 4.0.

Main Results:

  • Both Fe-FeFAp and FeF-FeAp showed similar total fluoride content and XRD patterns.
  • SEM revealed distinct morphologies: Fe-FeFAp formed rod-like crystals, while FeF-FeAp formed needle-like crystals.
  • EDS indicated higher fluoride intensity in Fe-FeFAp compared to FeF-FeAp.
  • Fe-FeFAp exhibited lower apparent solubility (Ca: 8.83 ± 0.20, P: 4.27 ± 0.13 mmol l⁻¹) than FeF-FeAp (Ca: 10.8 ± 0.4, P: 5.56 ± 0.09 mmol l⁻¹).

Conclusions:

  • The synthesis conditions significantly influence the crystal morphology and solubility of iron-containing fluoridated hydroxyapatites.
  • Two distinct types of heterogeneous iron-containing fluoridated hydroxyapatites (Fe-FeFAp and FeF-FeAp) can be formed with differing properties.
  • These findings highlight the potential for tailored synthesis of apatite materials with specific characteristics.