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Effect of PRP on hPDLC attachment. The result represents the means ± SD of three replicates. Control group, serum‐free DMEM medium; PRP, 12.5% (v/v) platelet‐rich plasma in serum‐free DMEM medium. The end concentration of TGF‐β1 and PDGF‐AB was 50 ng/ml and 17 ng/ml, respectively. *P < 0.05 PRP group vs. control group.
