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Table 2 Scores for radiographical classification of lesion severity

From: Detection and diagnosis of the early caries lesion

Score Criteria
0 no radiolucency
1 radiolucency in outer ½ of the enamel
2 radiolucency in inner ½ of the enamel ± EDJ
3 radiolucency limited to the outer 1/3 of dentine
4 radiolucency reaching the middle 1/3 of dentine
5 radiolucency reaching the inner 1/3 of dentine, clinically cavitated
6 radiolucency into the pulp, clinically cavitated