Morphological changes towards L929 cells as observed by inverted microscope after the post-treatment with BCP. Cells were treated with different concentrations of BCP for 72 h at 37 °C. a Untreated cells, b treated cells with 0.15 μg/mL, c treated cells with 0.30 μg/mL, d treated cells with 0.45 μg/mL, e treated cells with 0.60 μg/mL, f treated cells with 0.75 μg/mL, g treated cells with 1.5 μg/mL, h treated cells with 2.25 μg/mL (magnification 10×)