Human Teeth With and Without Dental Caries Studied by Visible Luminescent Spectroscopy

Abstract

The visible emission spectra and fluorescent life-time from decayed and nondecayed regions of teeth were measured and compared. The spectrum from carious lesions is different from that of noncarious tooth regions. This may offer a non-X-ray method for diagnosing dental caries in humans.

Micro-computerized tomography assessment of fluorescence aided caries excavation (FACE) technology: comparison with three other caries removal techniques

“…Spectrographic studies have shown that carious dentine fluoresces more intensely in the red portion of the visible spectrum than healthy dentine. 25,26 Thus, laser fluorescence can be used to detect caries based on differences in fluorescence intensity between carious and healthy dental tissue in the near-infrared spectral region. 25 In FACE, the cavity is exposed to a violet-blue light with a bandwidth between 370 and 420 nm to excite orange-red fluorescence in carious dentine.…”

Characterization of native fluorescence from DMBA-treated hamster cheek pouch buccal mucosa for measuring tissue transformation

“…Of the various fluorophores, the fluorescence of collagen, elastin and more generally proteins is due to the presence of aromatic amino acids that are related to the structural arrangement of cells and tissues. The other fluorophores NADH, FAD and endogenous porphyrin are related to metabolic processes or are in connection with the onset of a pathological condition (Alfano and Yao, 1981;Chance, 1989;Anderson-Engels et al, 1991).…”

“…Many applications of native fluorescence spectroscopy of biomolecules are reported on both the characterization of cell metabolic pathways (Chance et al, 1989) and the discrimination between diseased and normal tissue (Chance and Baltscheffsky, 1958;Alfano and Yao, 1981). Diagnostic oncology studies indicate that the native fluorescence properties of tissues can be exploited to distinguish the normal from the malignant condition in breast (Alfano et al, 1991;Katz et al, 1996), cervix (Glassman et al, 1992) and colon (Kapadia et al, 1990;Schomacker et al, 1992;Yang et al, 1995).…”

Avaliação in vitro do efeito do laser de CO2, associado ou não à aplicação tópica de flúor, na redução da desmineralização de superfícies radiculares

“…Tal método tem sido muito utilizado tanto em estudos in vitro e in situ, quanto em estudos in vivo para detecção e quantificação de lesões de cárie (SPITZER; TEN BOSCH, 1977;ALFANO;YAO, 1981;MUJAT et al, 2003).…”

“…(ALJEHANI et al, 2004),Contudo a quantificação da perda mineral através desta técnica é realizada de maneira não destrutiva e permite o monitoramento de lesões quanto à perda e ganho mineral ao longo do tempo, o que é essencial para que se consiga determinar o grau de atividade de lesão e, conseqüentemente, um correto plano de tratamento para a doença cárie (ALFANO; YAO, 1981).…”