Table 2.

Scores of the index and the reference assessment methods.

Scores of the visual-tactile assessment method using FDI criteria	Scores of the light-induced fluorescence camera (VistaCam iX)	Scores of the laser-induced fluorescence device (DIAGNOdent pen 2190)	Scores of the reference Standard
Score 1: No caries/demineralization at the restoration margin detectable after air drying.	Score 1: 0.0–0.9 Green (sound enamel)	Score 1: 0–13 (Sound enamel)	Score 1: Sound
Score 2: First visible signs of a non-cavitated caries lesion at the restoration margin detectable after air drying	Score 2: 1.0-–1.4 Blue (early stages of enamel lesion)	Score 2: 14–20 (Enamel caries)	Score 2: Enamel caries
Score 3: Established, non-cavitated caries lesion or microcavity at the restoration margin detectable without air drying or larger areas of demineralization, but Only Preventive measures necessary (dentin not exposed).	Score 3: 1.5–1.9 Red (deep enamel lesion up to the dentin-enamel junction)	Score 3: 21–29 (Caries in the dentin-enamel junction)
Score 4: Caries with cavitation, Localized dentin cavity (width > 250 μm, depth > 2 mm) at the restoration margin. Repair is possible (Localized and accessible can be repaired).	Score 4: 2.0–2.4 Orange (dentin caries dentin-enamel junction crossed)	Score 4:>29 (Dentin caries)	Score 3: Dentin caries
Score 5: Extensive dentin cavity at the restoration margin. Repair not possible/reasonable (not accessible for repair of restoration).	Score 5:>2.4 Yellow (deep dentin caries)