Define Code 0
No or questionable change in enamel translucency after prolonged air drying (>5s)
Define Code 1
First visual change in enamel
Define Code 2
Distinct visual change in enamel
Define Code 3
Localised enamel breakdown due to caries with no visible dentine
Define Code 4
Underlying dark shadow from dentine with or without localised enamel breakdown due to caries with no visible dentine
Define Code 5
Distinct cavity with visible dentine
Define Code 6
Extensive distinct cavity with visible dentine
List clinical presentations of Code 1
- Opacity or discolouration not visible on the wet surface
- Limited to the confines of the pit and fissure area
- Distinctly visible after air drying, or changes seen on a wet surface
List clinical presentations of Code 2
Opacity or discolouration distinctly visible on a wet surface and/or wider than the fissure/fossa area
List clinical presentations of Code 3
- Initial, localised enamel breakdown in opaque or discoloured enamel at the entrance to or within the pit and fissure
- Unnaturally wider than normal
- Dentin not visible in the walls or the base of the cavity
List clinical presentations of Code 4
Shadow of discoloured dentine (gray, blue or brown) visible through an apparently intact enamel or through a localised enamel breakdown
List clinical presentations of Code 5
- Cavitation in opaque or discoloured enamel exposing the dentine beneath – frank cavitation
- Visual evidence of demineralisation at the entrance to the pit and fissure
- In the examiners judgment dentine is exposed
List clinical presentations of Code 6
- Obvious loss of tooth structure
- Cavity is both deep and wide
- Dentine is clearly visible on the walls and at the base, revealing an extensive cavitation – possibly reaching the pulp
