Electrospun Gelatin/-TCP Composite Nanofibers Enhance Osteogenic Differentiation of BMSCs and In Vivo Bone Formation by Activating Ca²⁺-Sensing Receptor Signaling

Figure 3

SEM images of electrospun nanofibers before ((a) and (c)) and after cross-linking ((b) and (d)). ((a) and (b)) Gelatin nanofibers; ((c) and (d)) gelatin/β-TCP composite nanofibers. The insets in (b) and (d) show the sections of cross-linked gelatin nanofibers and gelatin/β-TCP composite nanofibers, respectively. The TEM image of a gelatin/β-TCP composite nanofibers is denoted by a black arrow in (c).

(a)

(b)

(c)

(d)