IN VITRO HYDROXYAPATITE FORMING ABILITY OF DICALCIUM SILICATE PREPARED FROM LOCAL RAW MATERIALS AND SINTERED AT 1050?C

International audienceIn this study, Ca2SiO4 powders were synthesised using solid state reaction. The starting powders were sintered at 1050 ??C for 2 h. Moreover, the in vitro bioactivity of ??-Ca2SiO4 was investigated by soaking the powders in a simulated body fluid (SBF) for various time periods to analyse the growth of hydroxyapatite (HA) on the surface of these powders. The synthesised powders were characterised by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), and Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES) analysis. The simulated body fluid results showed that the ??-Ca2SiO4 powders had good bioactivity to induce hydroxyapatite formation on their surface. The results obtained showed that (HCA) can be formed on the surface of ??-Ca2SiO4 soaked in the SBF solution for 1 day, and a continuous layer of dense HCA deposits covered the surface of ??-Ca2SiO4 powders after 3 days of soaking in the SBF solution. Finally, the results obtained suggest that ??-Ca2SiO4 ceramics are promising candidates for bone regeneration

Biological properties study of bioactive wollastonite containing 5 wt% B2O3 prepared from local raw materials

International audienceCaSiO3 ceramics have been proposed as a medical material for artificial bone and dental root. In this work, CaSiO3 powders were synthesized by mixture of (CaO) and (SiO2). The samples were sintered at 1,150°C for 2 h. Moreover, amounts of B2O3 (5.0 wt%) have been added. The in vitro bioactivity of both CaSiO3 and B2O3–CaSiO3 ceramics was investigated by soaking the powders in simulated body fluid (SBF) for various time periods to analyze the growth of hydroxyapatite (HA) on the surface of the powders. All the materials showed to be highly bioactive through the formation of a homogeneous HA on their surfaces. The B2O3–CaSiO3 showed strong hydration in the early stages of soaking in the SBF, when compared with pure CaSiO3, and the hydration was favorable for formation of carbonated HA. The results obtained indicate that the addition of B2O3 improved the biological properties of pure wollastonit