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2. Characteristics and properties of nanocrystalline apatites
2.1 Physico-chemical characteristics
Stoichiometric hydroxyapatite (HAP) differs from the apatitic phase of bone mineral or dentin in a number of ways. Bone or dentin apatite has a low degree of crystallinity due to the nanometric dimensions of its constituent crystals, as well as a crystalline disorder essentially linked to the sub-stoichiometry
. The non-stoichiometric character is determined by the presence of divalent ions, notably protonated phosphate ions (hydrogen phosphate
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Characteristics and properties of nanocrystalline apatites
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Bibliography
Standards and norms
- Surgical implants – Hydroxyapatite – Part 2: Hydroxyapatite coatings - ISO 13779-2 - 2008
- Surgical implants – Hydroxyapatite – Part 3: Chemical analysis and characterization of crystallinity and phase purity - ISO 13779-3 - 2008
- Surgical implants – Hydroxyapatite – Part 4: Determination of coating adhesion resistance - ISO 13779-4 - 2002
- Surgical implants – Hydroxyapatite – Part 6: powders...
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