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Osteogenic effects of CeO2 NPs on hPDLSCs after co-cultured at concentration of 0, 10, 50, and 100 μg/mL (a) ALP relative activity (left) and corresponding stained images (right) on day 7. (b) ARS assay of mineralization, OD values at 562 nm (left) and corresponding stained images (right) on day 21. (c) Osteogenic related gene expressions on day 7. (d) Osteogenic related protein expressions on day 14.
