Fig. 9
a The result of IHC staining indicated positive COL1 expression in all groups. The content of COL1 in CD + β-TCP-DPI group was higher than the other two groups; magnification, × 400; scale bar, 50 μm. b The IOD of CD + β-TCP-DPI group was higher than CD group (P = 1.262 × 10−7) and CD + β-TCP group (P = 1.666 × 10−7). This result indicated that the therapeutic effect of CD combined with implantation of β-TCP-DPI scaffolds was superior to CD and CD combined with implantation of unmodified β-TCP scaffolds. Data was expressed as mean ± standard deviation