A Monte Carlo simulation of the influence of sound enamel scattering coefficient on lesion visibility in light-induced fluorescence

Monique H. Van Der Veen, Masatoshi Ando, George K. Stookey, Elbert De Josselin De Jong

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Quantitative light-induced fluorescence (QLF) is based on the dark appearance of a white spot in otherwise highly fluorescent enamel. This can be explained by the increased scattering coefficient in the white spot compared with that of sound enamel. The aim of this study was to estimate the effect of different sound enamel scattering coefficients (SSE) and enamel thickness d, caused by developmental enamel differences, on the fluorescence appearance of white-spot lesions. We ran a Monte Carlo simulation of a 4 × 4 mm2 illuminated enamel slab on a highly fluorescent background. The slab had a 0.7 × 0.7 mm2, 100μm-deep, white spot in the center. Fluorescent and back-scattered photons re-emitted from the central 2 × 2 mm2 were recorded. We found that the fluorescence photon excitance from the white spot (Fws) was less than that of sound enamel (FSE), with an optimum difference for SSE between 20 and 80/mm. For SSE <20/ mm, both FSE and FWS decreased with d. We found no relation with d for SSE >20/mm. The results indicate that for small SSE, we are suffering from edge losses, which explains why the optimum for lesion visibility is not found at SSE = 0/mm, as would be expected.

Original languageEnglish (US)
Pages (from-to)10-18
Number of pages9
JournalCaries research
Volume36
Issue number1
DOIs
StatePublished - Jan 1 2002

Keywords

  • Deciduous enamel
  • Fluorescence
  • Monte Carlo modeling
  • Permanent enamel
  • Scattering

ASJC Scopus subject areas

  • Dentistry(all)

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