Table 3.

Periodontitis grade of the presented cases (table based on Tonetti [5]) representation of the categories in italics for case 1, bold for case 2, and bold italics for the same category

Grade			A	B	C
Primary criteria	Direct evidence	Longitudinal radiographic data	No bone loss	Direct evidence	Longitudinal radiographic data
	Indirect evidence of progression	% bone loss/age	< 0.25	0.25–1.0	> 1.0
		Case phenotype	Heavy biofilm deposits with low levels of destruction	Destruction commensurate with biofilm deposits	Destruction commensurate with biofilm deposits
Grade modifiers	Risk factors	Smoking	Non-smoker	Smoker < 10 cigarettes/day	Smoker ≥ 10 cigarettes/day
		Diabetes	No diabetes	HbA1c < 7%	HbA1c ≥ 7%