Fig. 3

Changes in the microbial diversity of the subgingival plaque of M2s in participants with neighboring N-M3s (N = 18) in response to N-M3 removal. Community richness was evaluated by a ACE and b Chao 1, while diversity was analyzed by c Shannon and d Simpson indexes. e Principal coordinate analysis (PCoA) plot based on weighted UniFrac distances and f weighted UniFrac distances depict beta diversity. T0, before N-M3 removal; T1, 3 months after N-M3 removal; T2, 6 months after N-M3 removal