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Bioactive glass-ceramics containing fluorapatite, xonotlite, cuspidine and wollastonite form apatite faster than their corresponding glasses

Kirste, Gloria ; Contreras Jaimes, Altair ; de Pablos-Martín, Araceli ; de Souza E Silva, Juliana Martins ; Massera, Jonathan ; Hill, Robert G ; Brauer, Delia S

Scientific reports, 2024-02, Vol.14 (1), p.3997-3997 [Periódico revisado por pares]

England: Nature Publishing Group

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  • Título:
    Bioactive glass-ceramics containing fluorapatite, xonotlite, cuspidine and wollastonite form apatite faster than their corresponding glasses
  • Autor: Kirste, Gloria ; Contreras Jaimes, Altair ; de Pablos-Martín, Araceli ; de Souza E Silva, Juliana Martins ; Massera, Jonathan ; Hill, Robert G ; Brauer, Delia S
  • Assuntos: Apatite ; Biological activity ; Ceramics ; Computed tomography ; Degradation ; Mineralization ; Silicon dioxide ; Transmission electron microscopy ; Wollastonite ; X-ray diffraction
  • É parte de: Scientific reports, 2024-02, Vol.14 (1), p.3997-3997
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: Crystallisation of bioactive glasses has been claimed to negatively affect the ion release from bioactive glasses. Here, we compare ion release and mineralisation in Tris-HCl buffer solution for a series of glass-ceramics and their parent glasses in the system SiO -CaO-P O -CaF . Time-resolved X-ray diffraction analysis of glass-ceramic degradation, including quantification of crystal fractions by full pattern refinement, show that the glass-ceramics precipitated apatite faster than the corresponding glasses, in agreement with faster ion release from the glass-ceramics. Imaging by transmission electron microscopy and X-ray nano-computed tomography suggest that this accelerated degradation may be caused by the presence of nano-sized channels along the internal crystal/glassy matrix interfaces. In addition, the presence of crystalline fluorapatite in the glass-ceramics facilitated apatite nucleation and crystallisation during immersion. These results suggest that the popular view of bioactive glass crystallisation being a disadvantage for degradation, apatite formation and, subsequently, bioactivity may depend on the actual system study and, thus, has to be reconsidered.
  • Editor: England: Nature Publishing Group
  • Idioma: Inglês
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