Fig. 5
SEM showed the complexes had a network-like structure. It contained randomly arranged fibrillar elements of homogeneous thickness, with a large number of nucleus pulposus-like cells (yellow arrow) and a small amount of platelet aggregates (white arrow) distributed among them, × 3000 (a). It had a honeycomb-like and porous section. The pore size of PRP gel scaffold ranged from 5 μm to 100 μm, × 2000 (b)