7/25/2019 ICDAS vs WHO

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Comparing between epidemiological surveys

Comparison between WHO1and ICDAS II

2Codes

WHO Codes ICDAS II Codes

Visual Caries Detection

Threshold

00 Sound

01

0, A (sound)02

Non cavitated

03Surface

discontinuity 3

Enamelcaries

(visually)

04, 14, 24 Non cavitated 4

05, 15. 25, 80-851, B (decayed crown)

06, 16, 26, 86

Cavitated

Obviousdentinal

caries

(visually)

2, C (filled and decayed) All 2 digit codes starting with 3, 4, 5, 6 and

ending 4, 5 or 6

3, D (filled, no decay)

All 2 digit codes starting 3, 4, 5, 6 and

ending 0, 1, 2 or 3 (*see exception below forcrowns/abutments placed for reasons other

than caries)

4, E (missing due to caries) 97

5 (permanent tooth missing for otherreasons) 98

6, F (sealant)

10, 20, 11, 21, 13, 23 also WHO may

include composite restorations restoring aninvestigated occlusal fissure to be in this

catergory ie some instances of code 30, 31,

32, 33

7, G (bridge abutment or specialcrown)

*Any 2 digit code starting 6 and ending 0,1,2 or 3 and placed for some reason other

than for caries, e.g. bridge abutment or

because of trauma

8 (unerupted) 991. Oral Surveys - Basic Methods (4 thEdition) accessed on 14thDecember 2007 from http://www.whocollab.od.mah.se/expl/orhsurvey97.html

2. ICDAS II codes accessed on 14 thDecember 2007 from http://www.icdas.org/

3.

ICDAS code 3 is enamel caries with surface discontinuitybut no dentine is exposed. At the dentinal threshold for visual detection therefore this would becoded as sound even though it is known that many of these lesions would histologically involve dentine. Please note that interpretation of the WHO criteriavaries internationally as to whether ICDAS code 3 lesions would be regarded as sound or not.

4. There may be micro-cavitation but no cavity exposing dentine

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WHO Caries Criteria

4th

Edition Oral Surveys - Basic Methods

Code

Primary

teeth

Permanent

teeth

Crown Crown Root

Condition/status

A 0 0 Sound

B 1 1 Decayed

C 2 2 Filled, with decay

D 3 3 Filled, no decay

E 4 - Missing, as a result of caries

- 5 - Missing, any other reason

F 6 - Fissure sealant

G 7 7 Bridge abutment, special crown or veneer/implant

- 8 8 Unerupted tooth (crown)/unexposed root

T T - Trauma (fracture)

- 9 9 Not recorded

ICDAS II Caries Criteria

Restoration and Sealant Codes Caries Codes

0 = Not sealed or restored 0 = Sound tooth surface1 = Sealant, partial 1 = First visual change in enamel

2 = Sealant, full 2 = Distinct visual change in enamel

3 = Tooth coloured restoration 3 = Enamel breakdown, no dentine visible

4 = Amalgam restoration 4 = Dentinal shadow (not cavitated into dentine)

5 = Stainless steel crown 5 = Distinct cavity with visible dentine6 = Porcelain, gold, PFM crown or veneer 6 = Extensive distinct cavity with visible dentine

7 = Lost or broken restoration

8 = Temporary restoration Missing Teeth

97 = Extracted due to caries98 = Missing for other reason

99 = Unerupted

A 2-digit codeshould be used.

The first digit isthe Restoration

and Sealant Codeand the second

digit is the Caries

Code