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. 2018 Oct 9;9:2374. doi: 10.3389/fmicb.2018.02374

FIGURE 4.

FIGURE 4

Alpha diversity of the microbiota from root canal of PAP and SAP teeth. Shannon diversity index was based on OTU relative abundance. ∗∗0.001 < P < 0.01. PAP, primary apical periodontitis; SAP, secondary apical periodontitis.