The viability results of the Ce-doped bioactive glass nanoparticles composite scaffolds on osteosarcoma cells. (A-T) The results were shown for Cl/CH, Cl/CH/C0, Cl/CH/C5 and Cl/CH/C10, respectively before and after staining by SRB stain from three independent experiments at exposure time 1h and 24h of treatment. Cell viability decreased respectively and the composite with low level of cerium concentration 5 was significantly greater than all other groups and control cells and caused growth inhibition to osteosarcoma cells more than 24%, Inverted Phase Contrast Microscope Digital Camera Olympus, Magnification 10x.