Methods Based on Light

These include:

    • Laser light-induced fluorescence, based on the phenomenon that caries lesions, plaque, and microorganisms all contain fluorescent substances that can be distinguished from each other and the autofluorescence of enamel and dentin.
    • Quantitative laser-light induced fluorescence, which can quantitatively detect the difference in fluorescence between sound tissue and that of a caries lesion.
    • DIAGNOdent, which uses red light to induce fluorescence and handy tools/probes, such as the DIAGNOdentpen, which can fit into smaller spaces and fissures in occlusal and approximal surfaces of teeth to capture differences in fluorescence that could indicate a lesion.
    • Fiber-optic transillumination (FOTI) and the more sensitive digital imaging fiber-optic transillumination (DIFOTI), which are qualitative diagnostic methods by which teeth are transilluminated to detect shadows, which has been associated with the presence of carious lesions.