FIGURE 1.

Ctsk deficiency promotes alveolar bone regeneration. Eight‐week‐old Ctsk^−/− mice and their WT littermates were used for tooth extraction. Three mice were sacrificed 3, 7, 10 and 14 d after tooth extraction. A, Representative Micro‐CT scanning images of the extraction socket along the longitudinal direction of the maxillae. B, BV/TV (%), Tb. Th (mm) and Tb. Sp (mm) of trabecular bone in the extraction socket were analysed. C, Representative images of H&E staining paraffin sections. D, Representative images of Masson’s trichrome staining paraffin sections. The statistical analysis was shown: **P < .01