Fig. 8: Histological and immunohistological analysis.

Histological and immunohistological analysis of the sections for calvarial defects only and defects implanted with PCL and 2% PDA/PCL fibrous membranes at 4 and 8 weeks post implantation: a H&E staining, b Masson staining, c toluidine blue staining, d and immunohistological staining of OCN. HB host bone; CT connective tissue; NB newly formed bone. The red arrows in a–c point to the blood vessel