Fig. 4.

Histological analysis of the regenerated septal mucosa. Harvested septum was observed under light microscopy in coronal section (A) (hematoxylin and eosin stain; original magnification ×40). Mucosal thickness was measured vertically at the transition zone from the defect to normal mucosa (black double-sided arrow) at ×200 magnification, which was compared with the contralateral mucosa (white double-sided arrow) (B). Epithelial thickness (double-sided arrow) and ciliated epithelial cells (arrows) were evaluated under ×400 magnification (C).