Fig. 9

A TUNEL results (×400). B Ki67 results (×400). a–d, a1–d1 Sampling group 3 months after surgery. e–h, e1–h1 Sampling group 6 months after surgery. a, e, a1, e1 Normal group. b, f, b1, f1 Control group. c, g, c1, g1 Material group. d, h, d1, h1 MSCs group. C1 Percentage of apoptotic cells in each group at 3 or 6 months. C2 Percentage of proliferative cells in each group at 3 or 6 months. Cells labelled in green represent cells that are proliferating. Asterisk represents the statistical difference between each group and the normal group at 3 months. Hash represents the statistical difference between each group and the normal group at 6 months. *, ^#p < 0.05 or ***, ^###p < 0.001