In vitro bioactivity of 70 wt.% SiO2 - 30 wt.% CaO sol-gel glass, doped with 1, 3 and 5 wt.% NbF5

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creativework.keywordsIn vitro bioactivity, Niocalite, SiO2-CaO-NbF5, Sol-gel glasses
dc.contributor.authorRadev L.
dc.contributor.authorHristova K.
dc.contributor.authorJordanov V.
dc.contributor.authorFernandes M.
dc.contributor.authorSalvado I.
dc.date.accessioned2024-07-10T14:27:03Z
dc.date.accessioned2024-07-10T14:47:34Z
dc.date.available2024-07-10T14:27:03Z
dc.date.available2024-07-10T14:47:34Z
dc.date.issued2012-02-01
dc.description.abstractThe 70SiO2-30CaO (wt.%) sol-gel glasses doped with 1, 3 and 5 NbF5 (wt.%) were prepared via polystep sol-gel route. The synthesized glasses were characterized by XRD, FTIR and SEM. Changes in 1.5 SBF solutions were measured by ICP-AES. XRD of the glasses stabilized at 700°C for 6 hours proved the presence of niocalite. FTIR was consistent with XRD data. The in vitro bioactivity study of all glasses prepared were carried out by soaking in 1.5 simulated body fluid (1.5 SBF) at 37°C for 6 and 12 days in static conditions. The FTIR reveals the formation of A-type and B-type carbonate containing hydroxyapatite (CO3HA) layer. Changes in 1.5 SBF solutions, after 6 days of soaking, show that the Ca concentration increased significantly, compared to the initial Ca content in the 1.5 SBF solution before in vitro test. After 12 days of immersion, the Ca concentration decreased, i.e., the formation of HA phase consumed Ca from 1.5 SBF solution. For all soaking times, the concentration of P is much lower than that the used 1.5 SBF. Based on these results we suggest that Ca and P play an active role in the future of the glasses. SEM depicts that the different morphology of hydroxyapatite can be formed as a function of soaking time. © 2011 Versita Warsaw and Springer-Verlag Wien.
dc.identifier.doi10.2478/s11532-011-0129-0
dc.identifier.issn1895-1066
dc.identifier.issn1644-3624
dc.identifier.scopusSCOPUS_ID:83455169062en
dc.identifier.urihttps://rlib.uctm.edu/handle/123456789/233
dc.language.isoen
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=83455169062&origin=inward
dc.titleIn vitro bioactivity of 70 wt.% SiO2 - 30 wt.% CaO sol-gel glass, doped with 1, 3 and 5 wt.% NbF5
dc.typeArticle
oaire.citation.issue1
oaire.citation.volume10
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