Collagen Scaffolds with Controlled Insulin Release and Controlled Pore Structure for Cartilage Tissue Engineering

Figure 6

SEM photomicrographs of the cross-sections of control collagen (a), (b), (e), and (f) and collagen-microbead hybrid (c), (d), (g), and (h) scaffolds after 3 hours ((a)–(d)) and 1 week ((e)–(h)) of chondrocyte culture. Yellow arrows represent the integrated insulin loaded PLGA microbeads in porous collagen matrix and green arrows represent adhered chondrocytes.