Fig. 5

Effects of silica microparticles on the migration and density of human periosteal cells. The cells were treated without silica microparticles derived from Neotube and subjected to time-lapse recording for 24 h. Photomicrographs acquired at 0, 8, 16, and 24 h are shown. Similar observations were obtained from four other independent experiments, including Vacuette’s silica, using periosteal cells derived from different donors