Figure 2.

SEM images of BMSCs on scaffold surfaces for 7 days. nHA coated PLGA (A and B); virgin PLGA scaffold (C and D).

Notes: More cells were found on the surface of the nHA coated PLGA scaffolds (A) than the PLGA scaffolds (C). On the nHA coated PLGA scaffolds, BMSCs stretched their pseudopodium and actively secreted ECM (B).

Abbreviations: ECM, extracellular matrix; BMSCs, bone marrow stromal cells; nHA, nano-hydroxyapatite; PLGA, poly (lactic-co-glycolic acid); SEM, scanning electron microscope.