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. 2017 Jul 28;7:6794. doi: 10.1038/s41598-017-06354-1

Figure 6.

Figure 6

Osteogenic differentiation of osteoblasts on different substrates: (a) ALP activity after incubation for 4, 7, 14, and 21 days; (b) Extracellular calcium production after incubation for 4, 7, 14, and 21 days (# means P < 0.05, compared with glass groups; * means P < 0.05, compared with PDLLA groups; Δ means P < 0.05, compared with P-PUUs groups).