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Effect of different PRP concentrations on ALP activity of hPDLC. The result represents the means ± SD of three replicates. Control group, serum‐free DMEM medium; PRP, serum‐free DMEM medium with the supernatant of activated platelet‐rich plasma; growth factor, serum‐free DMEM medium containing the combination of rhTGF‐β1 and rhPDGF‐AB. *P < 0.05 vs. control group; **P < 0.05 PRP group vs. growth factor group; ***P < 0.05 vs. other concentration subgroups among PRP group.
