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

Table 2

Effect of biofilm type. Two-way ANOVA table for the effect of the presence of other adhering bacteria (multispecies biofilm) on the total P. gingivalis in the biofilms.

ANOVA
Source of variation	SS	df	MS	𝐹	𝑃 value	𝐹 crit
Effect of biofilm type*	0.7377	1	0.7377	0.1692	0.6837	4.170877
Effect of bracket	7.9896	2	3.9948	0.9164	0.4109	3.31583
Interaction	2.1777	2	1.0888	0.2498	0.7806	3.31583
Within	130.7769	30	4.3592
Total	141.6819	35

*Mono- or multispecies biofilm.