Table 2.

Criteria for scoring plaque, where plaque is defined as “soft debris” and is visualized using ultraviolet illumination (modified Logan and Boyce as described by Hennet et al. [12]).

Score	Coverage	Thickness/intensity
0	None observable	0: none
1	1–24% coverage	1: light = pink to light red
2	25–49% coverage	2: medium = red
3	50–74% coverage	3: heavy = dark red
4	75–100% coverage