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Biomimetic apatite-based biomaterials: on the critical impact of synthesis and post-synthesis parameters
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Biomimetic apatite-based biomaterials: on the critical impact of synthesis and post-synthesis parameters
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Journal Article
Biomimetic apatite-based biomaterials: on the critical impact of synthesis and post-synthesis parameters
2012
Overview
Nanocrystalline apatites are major constituents of hard tissues, and attempts are made worldwide to prepare synthetic analogs. However the impact of synthesis/postsynthesis parameters is often disregarded. Based on an updated knowledge on such compounds, we inspected the effects of synthesis parameters (maturation time, temperature, pH, nature of counter-ions) and post-treatments (re-immersion in aqueous media, thermal treatment) on physicochemical characteristics. Great modifications were noticed during the 3 first days of maturation, where a progressive evolution of the apatite phase (localized in the core of the nanocrystals) toward stoichiometry was observed at the expense of the non-apatitic surface layer which progressively disappears. Similar trends were also evidenced for maturation run under increasing temperatures, studied here in the range 20–100 °C. pH impacted more specifically the chemical composition. The nature of the counter-ion in the starting phosphate salt influenced composition and nonstoichiometry, depending on its (in)ability to be incorporated in the lattice. Freeze-drying allowed to preserve a high surface reactivity, although further evolutions were noticed after re-immersion. Effects of a thermal treatment of dried samples were unveiled, suggesting a denaturation of the hydrated layer on the nanocrystals. This work underlines the necessity of a good control of synthesis/postsynthesis parameters for the production of biomimetic apatites.
Publisher
Springer US,Springer,Springer Nature B.V
Subject
/ Biological and medical sciences
/ Biomedical Engineering and Bioengineering
/ Ceramics
/ Chemistry and Materials Science
/ Glass
/ Ions
/ Microscopy, Electron, Transmission
/ Regenerative Medicine/Tissue Engineering
/ Spectroscopy, Fourier Transform Infrared
/ Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
