Fig. 1. Cell viability was determined by FDA/PI staining of osteoblasts at various concentrations (0µM, 4.46µM, 8.92µM, and 17.84 µM) of AP. (A-D ,E-H, I-L, M-P) Staining of osteoblasts at various concentrations (0µM, 4.46µM, 8.92µM, and 17.84 µM) of AP on day 3,5,7,9, respectively. The scale bar is 1000µm.