Table 2: Original Nyvad (NY) scores and the corresponding modified scores used in the study.

Original NY score

Modified score

 

0

0

Sound

1

1

Active enamel caries, intact surface

4

2

Inactive enamel caries, intact surface

2

3

Active enamel caries, surface discontinuity

5

4

Inactive enamel caries, surface discontinuity

3

5

Active enamel or dentin caries, cavity

6

6

Inactive enamel or dentin caries, cavity