Laser-induced autofluorescence of carious regions of human teeth and caries-involved bacteria

Karsten Koenig; Raimund Hibst; Herbert Meyer; Gabriela Flemming; Herbert Schneckenburger

doi:10.1117/12.166180

31 December 1993 Laser-induced autofluorescence of carious regions of human teeth and caries-involved bacteria

Karsten Koenig, Raimund Hibst, Herbert Meyer, Gabriela Flemming, Herbert Schneckenburger

Proceedings Volume 2080, Dental Applications of Lasers; (1993) https://doi.org/10.1117/12.166180
Event: Europto Biomedical Optics '93, 1993, Budapest, Hungary

Abstract

Carious regions of human teeth were investigated by means of remission-, fluorescence excitation- and fluorescence emission spectroscopy as well as time-resolved fluorescence measurements in the ns region. A detection of dental caries is possible with all of these spectroscopic methods. The peaks in measured remission- and fluorescence excitation spectra of carious regions correspond with the absorption bands of metal free porphyrins. The emission spectra and fluorescence decay kinetics indicate that protoporphyrin IX may be the main chromophore. HPLC measurement verify the existence of proto- (main component), copro- and probably Zn-protoporphyrin.

Citation Download Citation

Karsten Koenig, Raimund Hibst, Herbert Meyer, Gabriela Flemming, and Herbert Schneckenburger "Laser-induced autofluorescence of carious regions of human teeth and caries-involved bacteria", Proc. SPIE 2080, Dental Applications of Lasers, (31 December 1993); https://doi.org/10.1117/12.166180

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