Adhesion of Porphyromonas gingivalis and Biofilm Formation on Different Types of Orthodontic Brackets

Table 1

The effect of the salivary pellicle. Two-way ANOVA table for the effect of the presence of a salivary pellicle on the total P. gingivalis in the biofilms.

ANOVA
Source of variation	SS	df	MS	𝐹	𝑃 value	𝐹 crit
Effect of saliva	65.8670	1	65.8670	39.9604	0.0000	4.170877
Effect of bracket	7.9896	2	3.9948	2.4236	0.1058	3.31583
Interaction	18.3761	2	9.1881	5.5742	0.0087	3.31583
Within	49.4492	30	1.6483
Total	141.6819	35