Fig. 2. (A) Water contact angle of coaxial electrospun nanofibers; (B) absorbance of coaxial electrospun nanofibers after contact with blood; (C) cumulative release curve of VEGF growth factor; (D) cumulative release curve of IGF growth factor; (E) the proliferation activity of osteoblasts detected by CCK-8 method after 1, 3, and 7 days of different scaffold cultures. (F) Number of adherent osteoblasts after 4 and 8 hours of culture. All data were labeled as mean ± standard deviation, n = 6, **P < 0.01,***P < 0.001,****P < 0.0001, compared to S0.