Caries visible when wet?

Cavity with exposed dentin?

More than half tooth involved?

Undermining shadow?

Is there micro-cavitation?

Lesion confined to base of fissure?

Any opacity or discoloration?

Code 3

Code 4

Code 0

ICDAS Decision Tree

© JK Mitchell, DDS, MEd. Information from ICDAS website.

Yes

No

Yes

Code 6

Code 5

Yes

No

No

No

Dry and re-examine

Yes

No

Code 1

Code 2

Yes

No

Code 1Yes

No

YesDry and re-

examine

© JK Mitchell, DDS, MEd. From ICDAS website