Table 1. Rating system used for pre-anesthetic evaluation of periodontal disease.

Stage	Description
0	No plaque or calculus. Gums are normal.
I	Mild amount of plaque. Gums are mildly red
II	Moderate amount of plaque. There is redness and swelling of the gums
III	Tartar is present. Gums are receding or hyperplastic
IV	Heavy tartar is present. Gums are severely inflamed. There may be evidence of infection or tooth loss.