TY - JOUR ID - 91121 TI - An investigation on injectable composites fabricated by 45S5 bioactive glass and gum tragacanth: Rheological properties and in vitro behavior JO - Advanced Ceramics Progress JA - ACP LA - en SN - 2423-7477 AU - Rasti, Mahtab AU - Hesaraki, Saeed AU - Nezafati, Nader AD - Department of Nanotechnology & Advanced Materials, Materials and Energy Research Center, Karaj, Iran Y1 - 2018 PY - 2018 VL - 4 IS - 2 SP - 16 EP - 26 KW - Injectable composite KW - Tragacanth KW - 45S5 bioactive glass KW - Rheological properties KW - Degradability, Swelling DO - 10.30501/acp.2018.91121 N2 - The injectable composites were formulated from melt-derived 45S5 bioactive glass powder and gum tragacanth. The effect of the tragacanth (2 and 4 w/v%) and powder to liquid ratio (P/L= 1.5 to 2.5) on rheological properties, injectability, degradation, swelling, and bioactivity the composites were studied. With increasing the P/L ratio and tragacanth concentration, the force required for injection of the composites is increased. However, the formulated composites show maximum injection force of 15 N, which seems to be appropriate for surgical purposes. The formulated composites indicate positive thixotropic behavior, whereas increasing tragacanth from 2% to 4% lead to deteriorating its behavior. Moreover, thecomposites formulated by 2% tragacanth show much more resistance against degradation and swelling. The bioactivity analyze confirms the formation of flake-like apatite nanostructures on the surface of nanocomposites in initial days of immersion into the SBF solution. UR - https://www.acerp.ir/article_91121.html L1 - https://www.acerp.ir/article_91121_2385887cde2e20ab15c31e3c7f799891.pdf ER -