Fig. 2.

Means of the bacterial compositions of in vitro biofilms derived from healthy (A) and periodontally diseased (B) samples as determined by predominant cultivable analysis (based on triplicate determinations of biofilms cultivated from eight subjects in each category). The identified bacterial species were grouped into periodontal complexes as described by Socransky et al. (33): the yellow complex, Streptococcus species (•): the purple complex, Veillonella species (○); the blue complex, Actinomyces species (▲); the green complex, Eikenella corrodens and Campylobacter species (△); the orange complex, Prevotella species, Campylobacter rectus and Fusobacterium species (■); and the red complex, Porphyromonas gingivalis, Treponema denticola and Tannerella forsynthensis (◆).