Fig. 7.

Structure and properties of collagen/silk fibroin (Col/SF) scaffolds. A Microstructure of freeze-dried SF scaffold. B Microstructure of freeze-dried Col/SF scaffolds with 20 wt% Col and 4 wt% SF. C Microstructure of Col/SF scaffolds incorporated with TGF-β1 containing poly(lactic-co-glycolic-acid) microsphere (TGF-β1- COL/SF). D Histological evaluation of Col/SF scaffolds after implantation in vivo for 12 weeks. COL/SF and no scaffold as a control group.

(Parts of figure are adapted with the permission from [128] A, B and [125] C and D)