Fig. 3

Beta diversity analysis. The microbial community compositional differences between each group; controls, erosive OLP, and non-erosive OLP groups. PCoA plot based on the unweighted UniFrac distance matrix showing the divergence in distribution of the oral microbiota from different samples/group. PC1, and PC2 labeled on the X and Y axis represent the top two principal coordinates that captured the fraction of diversity at the coordinate shown percent (NE: green triangle; E: orange double square; and C: blue circle). The distribution of samples in NE showed a cluster, which was distinguishable from samples in C group and the majority of samples in E group. The distribution of samples in E and in C groups appeared to be expanded broadly toward the direction of right of PCo1 and up of PCo2, respectively