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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Evaluation of Two Quantitative Analysis Methods of Optical Coherence Tomography for Detection of Enamel Demineralization and Comparison With Microhardness

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Author(s):
Cara, Ana C. B. [1] ; Zezell, Denise M. [1] ; Ana, Patricia A. [2] ; Maldonado, Edison P. [1] ; Freitas, Anderson Z. [1]
Total Authors: 5
Affiliation:
[1] Inst Pesquisas Energet Nucl, BR-05508000 Sao Paulo - Brazil
[2] Univ Fed ABC, BR-09210180 Santo Andre, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Lasers in Surgery and Medicine; v. 46, n. 9, p. 666-671, NOV 2014.
Web of Science Citations: 16
Abstract

Background and ObjectiveWe aimed to evaluate in the same study two quantitative methods for quantification of incipient caries in human dental enamel by using optical coherence tomography (OCT): the optical attenuation coefficient and the area under the A-scan signal, and to compare their results with those obtained from microhardness analysis. Study Design/Materials and MethodsOne hundred and sixty samples were obtained from 40 sound human third molars, which had their crowns sectioned. Simulated caries were created by a pH cycling method. OCT measurements were performed on the samples, before and after the induced demineralization. We determined the total optical attenuation coefficient from the OCT signal in each site and evaluated the sensitivity and specificity of this approach to the detection of the demineralization. Also, the areas under the OCT curves (AUC-OCT) and those from sectional microhardness tests (AUC-MH) were compared. ResultsBoth the analysis of the optical attenuation coefficient and the AUC-OCT were adequate to efficiently distinguish sound and demineralized samples with sensitivity of 0.93 and specificity of 0.96. The AUC-MH and the AUC-OCT data presented linear relationship and correlation of 0.99. ConclusionBoth methods for signal analysis from OCT allowed detection of demineralization with good performance. The AUC-OCT approach enables obtaining a linear relation with the microhardness results, for a quantitative assessment of mineral loss in human teeth. Lasers Surg. Med. 46:666-671, 2014. (c) 2014 Wiley Periodicals, Inc. (AU)

FAPESP's process: 10/03123-8 - Development process evaluation of dental enamel demineralization using the optical coherence tomography
Grantee:Ana Claudia Ballet de Cara
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 05/51689-2 - Optics and Photonics Research Center at UNICAMP
Grantee:Hugo Luis Fragnito
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC