Quantitative evaluation of simulated human enamel caries kinetics using photothermal radiometry and modulated luminescence

Adam Hellen, Andreas Mandelis, Yoav Finer, Bennett T. Amaechi

Resultado de la investigación: Conference contribution


Photothermal radiometry and modulated luminescence (PTR-LUM) is a non-destructive methodology applied toward the detection, monitoring and quantification of dental caries. The purpose of this study was to evaluate the efficacy of PTRLUM to detect incipient caries lesions and quantify opto-thermophysical properties as a function of treatment time. Extracted human molars (n=15) were exposed to an acid demineralization gel (pH 4.5) for 10 or 40 days in order to simulate incipient caries lesions. PTR-LUM frequency scans (1 Hz - 1 kHz) were performed prior to and during demineralization. Transverse Micro-Radiography (TMR) analysis followed at treatment conclusion. A coupled diffusephoton- density-wave and thermal-wave theoretical model was applied to PTR experimental amplitude and phase data across the frequency range of 4 Hz - 354 Hz, to quantitatively evaluate changes in thermal and optical properties of sound and demineralized enamel. Excellent fits with small residuals were observed experimental and theoretical data illustrating the robustness of the computational algorithm. Increased scattering coefficients and poorer thermophysical properties were characteristic of demineralized lesion bodies. Enhanced optical scattering coefficients of demineralized lesions resulted in poorer luminescence yield due to scattering of both incident and converted luminescent photons. Differences in the rate of lesion progression for the 10-day and 40-day samples points to a continuum of surface and diffusion controlled mechanism of lesion formation. PTR-LUM sensitivity to changes in tooth mineralization coupled with opto-thermophysical property extraction illustrates the technique's potential for non-destructive quantification of enamel caries.

Idioma originalEnglish (US)
Título de la publicación alojadaPhotonic Therapeutics and Diagnostics VII
EstadoPublished - 2011
EventoPhotonic Therapeutics and Diagnostics VII - San Francisco, CA, United States
Duración: ene 22 2011ene 24 2011

Serie de la publicación

NombreProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (versión impresa)1605-7422


OtherPhotonic Therapeutics and Diagnostics VII
País/TerritorioUnited States
CiudadSan Francisco, CA

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging


Profundice en los temas de investigación de 'Quantitative evaluation of simulated human enamel caries kinetics using photothermal radiometry and modulated luminescence'. En conjunto forman una huella única.

Citar esto