Fig. 6From: Small extracellular vesicles from dental follicle stem cells provide biochemical cues for periodontal tissue regenerationScanning electron microscopy of collagen sponges and collagen sponges coated with DFSCs-sEVs. A Scanning electron microscopy of collagen sponges and the surface of the collagen sponge was porous. B Scanning electron microscopy of collagen sponges coated with DFSCs-sEVs, which confirmed the presence of the DFSCs-sEVs particlesBack to article page