Table 2 Caries level of ICDAS II scoring system (second- digit code)

0

Sound tooth surface: no evidence of caries after prolonged air drying (5 s)

1

First visual change in enamel: opacity or discoloration (white or brown) is visible at the entrance to the pit or fissure after prolonged air drying, which is not or hardly seen on a wet surface

2

Distinct visual change in enamel: opacity or discoloration distinctly visible at the entrance to the pit and fissure when wet, lesion must still be visible when dry

3

Localized enamel breakdown due to caries with no visible dentine or underlying shadow: opacity or discoloration wider than the natural fissure/fossa when wet and after prolonged air drying

4

Underlying dark shadow from dentine + /– localized enamel breakdown

5

Distinct cavity with visible dentine: visual evidence of demineralization and dentine exposed

6

Extensive distinct cavity with visible dentine and more than half of the surface involved