Figure 5 Different taxon analysis among 4 groups at phylum level (A) and genus (B) level. (A) Firmicutes (P=0.043 <0.05) have significant differences at phylum level among 4 groups. (B) Streptococcus (P=0.013 <0.05) and Porphyromonas (P=0.032 <0.05) have significant differences at genus level among 4 groups. The abscissa represents the proportion of bacteria at genus level on the surface of the materials. The left ordinate represents the bacterial species. The right ordinate represents the P value. Unclassifed_La refers to unclassified Lactobacillalles, * represents P≤0.05.