Investigating the effect of germanium on the structure of SiO 2 -ZnO-CaO-SrO-P 2 O 5 glasses and the subsequent influence on glass polyalkenoate cement formation, solubility and bioactivity

A series of germanium (Ge)-containing glasses were synthesized based on a starting glass composition of SiO -ZnO-CaO-SrO-P O . Additions of GeO (6 and 12 mol%) were incorporated at the expense of SiO which retained the amorphous character, and each glass was processed to present similar particle siz...

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Bibliographic Details
Published in:Materials science & engineering. C, Materials for biological applications Materials for biological applications, 2019-10, Vol.103, p.109843
Main Authors: Mokhtari, S, Krull, E A, Sanders, L M, Coughlan, A, Mellott, N P, Gong, Y, Borges, R, Wren, A W
Format: Article
Language:English
Subjects:
Body Fluids - chemistry
Germanium - chemistry
Glass - chemistry
Glass Ionomer Cements - chemistry
Humans
Solubility
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Summary:A series of germanium (Ge)-containing glasses were synthesized based on a starting glass composition of SiO -ZnO-CaO-SrO-P O . Additions of GeO (6 and 12 mol%) were incorporated at the expense of SiO which retained the amorphous character, and each glass was processed to present similar particle size and surface area. Glass characterization using x-ray photoelectron spectroscopy (XPS) and magic angle spinning nuclear magnetic resonance (MAS-NMR) determined that the addition of GeO increased the fraction of lower Q-speciation and subsequently the concentration of non-bridging oxygens (NBO). Glass Polyalkenoate Cements (GPC) were formulated from each glass with 40, 50 and 60 wt% PAA, and presented time dependent solubility profiles (1, 10, 100, 1000 h) for the release of Si (4-140 mg/l), Ca (1-8 mg/l), Zn (
ISSN:1873-0191