Table 1 Registration of gingivitis in SCOR, 1972–2022 using Fédération Dentaire Internationale (FDI) notation

1

Slight changes in the color and surface of gingiva, no bleeding on probing.

1*

Mild gingivitis – initial changes in the margo gingiva and at the top of the gingival papillae, no bleeding on probing.

X

Missing registration tooth (lost or not yet erupted).

2

Moderately inflamed gingiva, changes in color, shape and surface, bleeding upon probing.

2

Moderate gingivitis – bleeding upon probing at 0.5 mm beneath margo gingiva.

3

Severe inflammation, clear changes in the color, shape and surface of the gingiva, ulceration.

X

Missing registration.

Mandatory registration.

Mandatory registration from age 7.

Non-mandatory registration.

Registered on 4 index teeth (tooth 52 and 55, and 82 and 85 in the temporary dentition, and 12 and 16, and 42 and 46 in the permanent dentition). If a registration tooth is missing the nearest neighboring tooth is used. Calculated as index.

Registered on 12 index teeth (teeth 11, 12, 21, 22, 31, 32, 41, 42 and 16, 26, 36, 46). Calculated as index.

Registered on 12 index teeth (teeth 11, 12, 21, 22, 31, 32, 41, 42 and 16, 26, 36, 46). Calculated as index.