Fig. 3From: PPARβ/δ accelerates bone regeneration in diabetic mellitus by enhancing AMPK/mTOR pathway-mediated autophagyPPARβ/δ agonist promotes the formation of new bone and collagen of calvarial defects in diabetic rats. A Representative images of H&E staining of calvarial bone sections. B Representative images of Masson staining of calvarial bone sections. In the defect area, blue indicates new bone and collagen (scale bar = 300 μm). The calvarial defect margins are indicated by arrowsBack to article page