Fig. 2

Structural characterization of CGF and PDCs-CGF complex under SEM. a Thin and thick fibrillar elements composed dense fibrin network in CGF. b, c CGF membrane was almost completely covered by PDCs. d Multiple platelet cell elements were observed in CGF. CGF concentrated growth factor, PDCs periosteum-derived cells, SEM scanning electron microscopy. All experiments were performed independently (each experiment used PDCs and CGF from a different rabbit) and repeated three times