Research Papers: General

Spectral characteristics of caries-related autofluorescence spectra and their use for diagnosis of caries stage

[+] Author Affiliations
Sung-Ae Son

Pusan National University, School of Dentistry, Department of Conservative Dentistry, Yangsan 50612, Republic of Korea

Kyeong-Hoon Jung

Kookmin University, Department of Electrical Engineering, Seoul 02707, Republic of Korea

Ching-Chang Ko

University of North Carolina, School of Dentistry, Department of Orthodontics, Chapel Hill, North Carolina 27599, United States

Yong Hoon Kwon

Pusan National University, School of Dentistry, Department of Dental Materials, Yangsan 50612, Republic of Korea

J. Biomed. Opt. 21(1), 015001 (Jan 06, 2016). doi:10.1117/1.JBO.21.1.015001
History: Received August 5, 2015; Accepted December 4, 2015
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Abstract.  The purpose of the present study was to identify factors useful for diagnosis of the caries stage from laser-induced autofluorescence (AF) spectra. Affected teeth were accurately staged and allocated to four groups: sound, stage II, stage III, or stage IV. A 405-nm laser was used to produce AF spectra. The spectrum factors analyzed were spectrum slope at 550 to 600 nm, spectral area from 500 and 590 nm, and intensity ratio of peaks 625 and 667 nm (625/667  nm). DIAGNOdent was used as control measurement. AF spectra of sound teeth had a peak near 500 nm followed by a smooth decline to 800 nm. As caries progressed, some specimens in stages II to IV showed one or two peak(s) near 625 and 667 nm. Slopes at 550 to 600 nm and areas under the curve at 500 to 590 nm were significantly different (p<0.001) for each stage. Two-peak ratios were also significantly different (p<0.001) except for stage III and stage IV. DIAGNOdent readings for sound and stage II and stage III and IV were not significantly different. Among the studied factors, the spectrum slope at 550 to 600 nm and area under curve at 500 to 590 nm could be useful treatment decision-making tools for carious lesions.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Sung-Ae Son ; Kyeong-Hoon Jung ; Ching-Chang Ko and Yong Hoon Kwon
"Spectral characteristics of caries-related autofluorescence spectra and their use for diagnosis of caries stage", J. Biomed. Opt. 21(1), 015001 (Jan 06, 2016). ; http://dx.doi.org/10.1117/1.JBO.21.1.015001


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