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Gallium-containing phospho‐silicate glasses: Synthesis and in vitro bioactivity
- Publication Year :
- 2012
-
Abstract
- A series of Ga-containing phospho-silicate glasses based on Bioglass 45S5, having molar formula 46.2SiO2·24.3Na2O·26.9CaO·2.6P2O5·xGa2O3 (x=1.0, 1.6, 3.5), were prepared by fusion method. The reference Bioglass 45S5 without gallium was also prepared. The synthesized glasses were immersed in simulated body fluid (SBF) for 30 days in order to observe ion release and hydroxyapatite (HA) formation. All Ga-containing glasses maintain the ability of HA formation as indicated by main X-ray diffractometric peaks and/or electronic scanning microscopy results. HA layer was formed after 1 day of SBF soaking in 45S5 glass containing up to 1.6% Ga2O3 content. Moreover, gallium released by the glasses was found to be partially precipitated on the glass surface as gallium phosphate. Further increase in gallium content reduced the ion release in SBF. The maximum of Ga(3+) concentration measured in solution is ~6 ppm determined for 3.5% Ga2O3 content. This amount is about half of the toxic level (14 ppm) of gallium and the glasses release gallium till 30 days of immersion in SBF. Considering the above results, the studied materials can be proposed as bioactive glasses with additional antimicrobial effect of gallium having no toxic outcome.
- Subjects :
- Ceramics
Materials science
Simulated body fluid
chemistry.chemical_element
Mineralogy
Bioengineering
Gallium
Phospho-silicate glasses Gallium oxide Bioactivity test
Phosphates
Biomaterials
chemistry.chemical_compound
X-Ray Diffraction
Antimicrobial effect
Bioglass 45S5
Silicate glass
Scanning microscopy
Silicates
Gallium phosphate
In vitro
Body Fluids
Solutions
Durapatite
Eyeglasses
chemistry
Mechanics of Materials
Glass
Nuclear chemistry
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....184d5db4c744629140d8ae98fec8888a