Autofluorescence signals
All cusps and the denticles from inner lateral teeth emitted a strong green autofluorescence signal on their anterior and posterior surfaces, i.e., they emitted a strong signal after excitement with the 488 nm laser. The cusps’ lateral surfaces, the tooth styli and bases appeared rather red- to yellow-brown, i.e., emitted a strong signal after excitement with the lasers of 555 and 639 nm wavelength (see Figure 4). The bulges and bases of the teeth exhibited a strong blue signal, i.e., emitted a strong signal after excitement with the 405 nm laser).