Fig. 4

Observation of growth status after BMC-BCPC co-culture at 5 day under scanning electron microscope. a At 1 day, the cell quantity was small, which were scattered on the bone cement surface (×500). b At 5 days, the cell quantity was significantly increased and gathered in mass on the surface (×500). c, d The cell pseudopod invaded into the micropore (c, ×1000), and the cells grew into the material gap (d, ×3000)