Figure 4.

The boxplots of differences in bleeding on probing (BOP) after rinsing and at the baseline of each test toothpaste and the water application are presented for all the subjects (n = 20, colored), showing median percentages, 25th and 75th quartiles, standard deviation, and outliers. The data of both water runs, which were performed prior to the test phase, were averaged. C+ = enzyme-containing toothpaste with Citrox; SLS = SLS-containing reference toothpaste; placebo = reference toothpaste without SLS and without enzymes; C− = enzyme-containing toothpaste without Citrox; control = mean values after water rinsing.