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Alpha diversity of the subgingival microbiome. (A) Richness of the subgingival microbiome. Richness is represented by the number of operational taxonomic units (OTUs). (B) Evenness of the subgingival microbiome. Evenness is represented by Shannon index. (*p < 0.05; H (green): healthy; P (red): periodontitis before non-surgical therapy; A (blue): periodontitis after non-surgical therapy).
