The effect of strontium and silver on the bioactivity of a quaternary bioglass in the system SiO₂-CaO-Na₂O-P₂O₅

Characteristics of Ag-incorporated bioactive glasses prepared by a modified sol–gel method with a shortened synthesis time and without the use of catalysts

“…These exothermic peaks are the results of the combustion of residual organic compounds such as organic precursors. 6 Interestingly, in all analyzed samples there is no observation of any endothermic peak around 500 °C which is a result of nitrate decomposition and normally appears in the glasses synthesized by the conventional sol–gel method at room temperature. 10,25,26 This change could be due to the significant differences in synthesis methods.…”

“…Consequently, the bioactivity of synthetic glass systems tends to decrease rapidly. 6,9 More specifically, silver crystalline peaks at 38°, 44°, 64°, and 77° appear more obvious and exhibit stronger intensity in synthetic samples with higher content of Ag 2 O (Fig. 2).…”

“…Moreover, glasses synthesized by the sol–gel method have higher purity, porosity, specific surface area, and bioactivity than the glasses synthesized by the melting method. 4,5 In the sol–gel method, some biological beneficial elements such as silver (Ag), 6,7 copper (Cu), 8,9 strontium (Sr), 9 magnesium (Mg), 10 zinc (Zn), 11,12 and zirconia (Zr) 13 were added to synthetic glasses to control the bioactivity and biocompatibility. Moreover, beneficial elements were also incorporated into glass systems to produce new properties; for example, silver is incorporated into glass systems to induce antibacterial properties.…”

“…Moreover, benecial elements were also incorporated into glass systems to produce new properties; for example, silver is incorporated into glass systems to induce antibacterial properties. 6,7,[14][15][16] Although the sol-gel method has outstanding advantages over the melting method, it still exits several limitations. Glasses synthesized by the solgel method normally take a long time from a few days to several weeks.…”

Effect of sintering temperature on mechanical and bioactivity properties of bioactive glass and cordierite composite

“…The decreasing intensity of crystalline peaks of combeite and cordierite indicated the lower presence of the crystalline phase after immersion in HBSS. This change represented the degradation of combeite and cordierite in HBSS, which indirectly showed their biodegradable properties [36], even at high sintering temperatures. The apatite peaks were also observed after immersion in HBSS for 14 days.…”