Fig 1.

Photography showing in A the macroscopy of three regions of PRF (upper body, medium body and buffy coat) and eletrocmicrographs (B to M). Observe the ultrastructural arrangements of the three regions of PRF (B, C, D), activated platelet (E) with pseudopods and degranulation process (F, G, H). Also, observe the fibrin surface with polymeric chains and impregnated superficial nanoparticles (I, J). In K, L, M are shown interspersed plankton diatoms frustules in PRF matrix obtained by Vacuette™ plastic tube with a clot activator.