β‐Diversity by PCA
The results of the β‐diversity analysis of the saliva and tongue coating samples are shown in Figure Change in β‐diversity based on principal component analysis. (a) Saliva/Day 1, (B) saliva/Week 1, (c) saliva/Week 3, (d) tongue/Day 1, (e) tongue/Week 1, (f) tongue/Week 3. Blue circles indicate the control group and red triangles indicate the cetylpyridinium chloride (CPC) spray group. *