- Grade 0: Pinky colored gingiva, no bleeding on probing. (Healthy)
- Grade 1: Reddish discoloration of gingiva, no Bleeding on probing.
- Grade 2: Bleeding on probing after 30 sec.
- Grade 3: Bleeding on probing, tendency for spontaneous bleeding.
Note: All grades regarded inflamed (gingivitis) except grade 0 (healthy). All selected teeth surfaces are examined simultaneously (probing them at same time).