FIG. 4.
Scanning electron microscopy images of PPP, PRP, and platelet-rich fibrin (PRF) show platelet aggregates and fibrin fibers. (a) PPP×3000; (b) PRP×3000; (c) PRF×3000; (d) PPP×10,000; (e) PRP×10,000; (f ) PRF×10,000. P, platelet aggregates.
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