Laser-induced fluorescent diagnostics of dental caries

  • Eugene S. Voropay Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus
  • Michael P. Samtsov Sevchenko Institute of Applied Physical Problems of Belarusian State University, 7 Kurčatava Street, Minsk 220108, Belarus
  • Lyudmila S. Lyashenko Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus
  • Alexandr V. Butvilovsky Belarusian State Medical University, 83 Dziaržynskaha Avenue, 83, Minsk 220016, Belarus
  • Viktoriya R. Haifulina Belarusian State Medical University, 83 Dziaržynskaha Avenue, Minsk 220016, Belarus
  • Maria V. Bobkova Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

Abstract

This paper presents the results obtained in vitro in studies of the spectral and luminescence characteristics for the surfaces of hard dental tissues in the norm and with pathologies when using for radiation excitation the laser sources with the wavelength l = 514.5 or l = 684 nm. It is shown that, on excitation by an argon laser with l = 514.5 nm, a maximum of a fluorescence spectrum for the normal dental tissue is located at 568 nm, the band halfwidth coming to 122 nm. A maximum of fluorescence for the caries affected dental area is found at the wavelength l = 655 nm, the halfwidth coming to 192 nm. It is demonstrated that, with the use of a spectrometric system using radiation of a semiconductor laser with the wavelength 684 nm for fluorescence excitation, the form and position of fluorescence spectra for carious tissues is identical to that for the normal tissues (with a maximum at 755 nm at the halfwidth 75 nm) but the fluorescence intensity is higher by the order of magnitude. It is found that, on excitation at the wavelength 684 nm, there is a possibility to reveal not only the surface but also the deep-lying caries. The data obtained point to the effectiveness of the proposed laser-induce fluorescence method for diagnostication of dental caries owing to the realization of optical probing of dental health.

Author Biographies

Eugene S. Voropay, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

doctor of science (physics and mathematics), full professor; head of the department of laser physics and spectroscopy, faculty of physics

Michael P. Samtsov, Sevchenko Institute of Applied Physical Problems of Belarusian State University, 7 Kurčatava Street, Minsk 220108, Belarus

doctor of science (physics and mathematics), docent; head of the laboratory of spectroscopy

Lyudmila S. Lyashenko, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

PhD (physics and mathematics); associate professor at the department of laser physics and spectroscopy, faculty of physics

Alexandr V. Butvilovsky, Belarusian State Medical University, 83 Dziaržynskaha Avenue, 83, Minsk 220016, Belarus

PhD (medical); associate professor at the 2nd department of therapeutic dentistry, faculty of dentistry

Viktoriya R. Haifulina, Belarusian State Medical University, 83 Dziaržynskaha Avenue, Minsk 220016, Belarus

assistant at the 2nd department of therapeutic dentistry, faculty of dentistry

Maria V. Bobkova, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

student at the faculty of physics

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Published
2017-05-30
Keywords: enamel, caries, hard dental tissues, laser-induced fluorescence, diagnostics
Supporting Agencies The research was supported by Belarusian Republican Foundation for Fundamental Research ( projects F16R-131, F16R-209, F16MB-006) and Ministry of Education of the Republic of Belarus
How to Cite
Voropay, E. S., Samtsov, M. P., Lyashenko, L. S., Butvilovsky, A. V., Haifulina, V. R., & Bobkova, M. V. (2017). Laser-induced fluorescent diagnostics of dental caries. Journal of the Belarusian State University. Physics, 2, 10-16. Retrieved from https://journals.bsu.by/index.php/physics/article/view/434
Issue
No 2 (2017): Journal of the Belarusian State University. Physics
Section
Optics and Spectroscopy

Copyright (c) 2017 Journal of the Belarusian State University. Physics

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