Fig. 4

A H&E staining of the femoral head in the experimental group and control group: 6 W, 12 W, and 18 W after the operation; B Quantitative results showing the percentage of bone trabeculae in H&E staining between groups; C Masson staining of the femoral head in the experimental group and control group: 6 W, 12 W, and 18 W after the operation; D Quantitative results showing the percentage of collagen fibres in the Masson trichrome staining between groups. Scale bar = 100 µm. Asterisks indicate statistical significance (*p < 0.05, **p < 0.01, ***p < 0.005)