
The image captured of a healthy tooth will be black and white with varying intensities of green areas symbolizing the fluorescence signal.
Depending on the thickness of the enamel, this green signal will be more or less intense: the light has to penetrate the enamel, excite the dentin, and then the fluorescence signal reflected by the dentin has to go back through the enamel to get out.
Thicker enamel generates less fluorescence. The green intensity will be less, and slightly blue (due to passing through of the enamel). This is especially true on the cuspids.
Depending on the tooth pathology, (destructured enamel, fissure, infected dentin, crown) the fluorescence signal reflected by the dentin will be different (smaller, darker, redder, totally absent).
Tissue and crown appear black and white. Fluorescence signal homogeneous green return by healthy dentin shows healthy tooth.
Thick and healthy enamel on the cuspids backed by a non pathological healthy dentinal structure.