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SEM images of single- and dual-species biofilms: F. nucleatum: (A) 3 days, (B) 5 days, (C) 7 days; P. gingivalis: (D) 3 days, (E) 5 days, (F) 7 days; and dual-species (G) 3 days, (H) 5 days, (I) 7 days (blue arrow, F. nucleatum; yellow arrow, P. gingivalis; red arrow, biomass; bar=5 µm).
SEM: scanning electron microscopy.
