Comparison of light-induced and laser-induced fluorescence methods for the detection and quantification of enamel demineralization

Masatoshi Ando, Mostafa Analoui, Bruce Schemehorn, George Stookey

Research output: Contribution to journalConference article

5 Scopus citations

Abstract

The Quantitative Laser-induced Fluorescence (QLF) technique has been used for diagnosis of early caries in permanent teeth (PT). The objective of this study was to determine the caries quantification ability of QLF in deciduous teeth (DT). Sixty sound teeth, thirty DT and thirty PT, were used. All teeth were cleaned to remove debris and equally divided into three groups. Lesions were created in small windows (0.8×2.0 mm2) on buccal or labial surface for 48, 72, or 96 hr. Lesion images were made with a 488 nm argon laser (QLF I) and then with a 370±80 nm violet-blue light (QLF II). Both images were analyzed to determine the mean % change in fluorescence radiance (ΔF). A center section from the lesions was taken for analysis with microcardiography. The lesion depth and loss of mineral content (ΔZ) were determined. The correlations between ΔF and lesion depth as well as ΔZ in DT were 0.76 and 0.84 with QLF I, 0.81 and 0.88 with QLF II, respectively. In PT, correlations of 0.07 and 0.53 were found with QLF I, 0.15 and 0.62 with QLF II, respectively. It can be concluded the ability of QLF to quantify white-spots in DT is better than in PT.

Original languageEnglish (US)
Pages (from-to)148-153
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3593
StatePublished - Jan 1 1999
EventProceedings of the 1999 Lasers in Dentistry V - San Jose, CA, USA
Duration: Jan 24 1999Jan 25 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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