ICDAS codes

Question 1

ICDAS Code 0

Answer 1

Sound tooth with no demineralisation present when dried for 5 seconds.

Includes teeth with developmental anomalies.

Question 2

ICDAS Code 1

Answer 2

First visible change in enamel seen after drying for 5 seconds.
White/brown spot ONLY VISIBLE WHEN DRY

Question 3

ICDAS Code 2

Answer 3

Distinct visible change in the enamel which is ALSO VISIBLE when wet.

Question 4

ICDAS Code 3

Answer 4

Localised enamel breakdown with NO VISIBLE DENTINE or underlying shadow.

Question 5

ICDAS Code 4

Answer 5

Surface is intact/localised enamel breakdown.
UNDERLYING DENTINE SHADOWING

Question 6

ICDAS Code 5

Answer 6

Distinct cavity with visible dentine INVOLVING LESS THAN 1/2 of the tooth surface.

Question 7

ICDAS Code 6

Answer 7

Distinct cavity with visible dentine involving MORE THAN 1/2 of the tooth surface.