In vitro bioactive Gelatin/Silver containing sol-gel glasses composites: FTIR and SEM analysis

The main objectives of the presented study is the preparation of 80BG/20G (in wt. %) composites between sol-gel glasses (BG) in the SiO 2 -CaO-P 2 O 5 -xAg 2 O (x=0, 1, 2 and 4 wt. %) system  and gelatin (G), after soaking in 1.5 SBF solutions for 12 days in static conditions. The structure and in vitro bioactivity of the prepared composites were examined by XRD and FTIR. XRD for the composites, before soaking in 1.5 SBF solutions, revealed the presence of different CaCO 3 crystalline phases, such as aragonite, calcite and vaterite. In the prepared samples, XRD also detected the presence of in situ formed hydroxyapatite, accompanied with Wollastonite phase. FTIR of the studied 80BG/20G composites, after soaking in 1.5 SBF solutions, proved the formation of B-type carbonate contacting hydroxyapatite (bioapatite) on their surface. SEM-EDX results of the soaked samples show the presence of HA aggregates on the soaked surceases. On the bases of results obtained we can conclude that the synthesized BG/G composites are in vitro bioactive.