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Representative SEM images of the surface of β-TCP cylinders from batch CaP1 (Ca/P = 1.496); CaP3 (Ca/P = 1.497); CaP5 (Ca/P = 1.500) and CaP6 (Ca/P = 1.502), before cell culture, after 24 h in cell culture medium without and with HCl, with macrophages and with osteoclasts. The scale bar is the same for all images and represents 2 μm.
