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J Biophotonics. 2016 Jun;9(6):596-602. doi: 10.1002/jbio.201500111. Epub 2015 Sep 9.

Evaluation of dental enamel caries assessment using Quantitative Light Induced Fluorescence and Optical Coherence Tomography.

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Faculty of Dentistry, Universidade Estadual da Paraíba, Av. Coronel Pedro Targino S/N, Araruna, Paraíba, CEP 58233-000, Brazil.
Department of Prosthodonticsand Oral and Facial Surgery, Universidade Federal de Pernambuco, Recife, PE, Brazil.
Nuclear and Energy Research Institute, IPEN-CNEN/SP, São Paulo, SP, Brazil.
Centro Acadêmico do Agreste, Universidade Federal de Pernambuco - UFPE, Recife, PE, Brazil.
Physics Department, Universidade Federal de Pernambuco - UFPE, Recife, PE, Brazil.
Departamentof Dental Medicine, Karolinska Institutet, Sweden.


An in vitro study of morphological alterations between sound dental structure and artificially induced white spot lesions in human teeth, was performed through the loss of fluorescence by Quantitative Light-Induced Fluorescence (QLF) and the alterations of the light attenuation coefficient by Optical Coherence Tomography (OCT). To analyze the OCT images using a commercially available system, a special algorithm was applied, whereas the QLF images were analyzed using the software available in the commercial system employed. When analyzing the sound region against white spot lesions region by QLF, a reduction in the fluorescence intensity was observed, whilst an increase of light attenuation by the OCT system occurred. Comparison of the percentage of alteration between optical properties of sound and artificial enamel caries regions showed that OCT processed images through the attenuation of light enhanced the tooth optical alterations more than fluorescence detected by QLF System. QLF versus OCT imaging of enamel caries: a photonics assessment.


Dental caries; Optical Coherence Tomography; Optical caries detection method; Quantitative Light-induced Fluorescence

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