title: Discrimination of Dental Caries Using Colorimetric Characteristics of Fluorescence Spectrum.
abstract: The feasibility of colorimetric parameters for the discrimination of the stages of dental caries based on a light-induced autofluorescence spectrum at a 405-nm excitation wavelength was investigated. The fluorescence spectra of 4 groups of tooth samples (10 sound, 10 early-stage decay, 14 established decay, and 10 severe decay), which were classified by the International Caries Detection and Assessment System, were experimentally measured in vitro. The carious lesion samples had an additional fluorescence peak at around 627 nm. The mathematical relation of the fluorescence spectrum and human color perception was established and computed. With increasing severity, the fluorescence color changed from green to yellow according to the colorimetric parameters of the CIE 1931 (x, y) chromaticity coordinates and dominant wavelengths. The results from a one-way ANOVA of the dominant wavelength showed a statistically significant difference among the 4 classified groups. The colorimetric parameters of the light-induced fluorescence spectrum can potentially be applied to evaluate the various carious levels.
authors.affiliation: College of Life Information Science and Instrument Engineering, Hangzhou Dianzi University, Hangzhou, China.
authors.forename: Qingguang
authors.initials: Q
authors.lastname: Chen
authors.forename: Haihua
authors.initials: H
authors.lastname: Zhu
authors.forename: Ying
authors.initials: Y
authors.lastname: Xu
authors.forename: Bin
authors.initials: B
authors.lastname: Lin
authors.forename: Hui
authors.initials: H
authors.lastname: Chen
mesh_terms: D000465:Algorithms; D003116:Color; D003124:Colorimetry / Q000379:methods*; D003731:Dental Caries / Q000145:classification / Q000175:diagnosis*; D003743:Dental Enamel / Q000473:pathology; D003773:Dental Plaque / Q000175:diagnosis; D003804:Dentin / Q000473:pathology; D017886:Durapatite / Q000737:chemistry; D005240:Feasibility Studies; D005453:Fluorescence; D006801:Humans; D066298:In Vitro Techniques; D008027:Light; D013050:Spectrometry, Fluorescence / Q000379:methods
chemical_list: D017886:Durapatite