13th World Congress for Laser Dentistry

26-28, April 2012

Barcelona, Spain

Meeting Abstract

Sponsors: World Federation for Laser Dentistry

-  Poster 135

TITLE: Laser Induced Multiphoton Charge Separation Spectroscopy and its Applications in Dentistry.

AUTHORS: Schechter I, Feller L.

Chemistry Dept., Technion - Israel Inst. of Technology and Periodontology Dept, University of Limpopo, South-Africa

SOURCE: Med Oral Patol Oral Cir Bucal. 2012 May 1;17(Supplement1):S283.

* doi:10.4317/medoral.17643783

http://dx.doi.org/10.4317/medoral.17643783

Abstract

A new nondestructive analytical method for diagnosis of tooth caries is presented. The method is based on the laser induced multiphoton charge separation spectroscopy, which is a new kind of laser spectroscopy. In this method, fast conductivity signals are measured from tooth surfaces. The signals are acquired for a series of laser wavelengths, thus obtaining full charge separation spectra. The results indicate a good correlation between the charge separation results and the degree of severity of the caries, as diagnosed using traditional inspection. Moreover, the spectral information can be reduced (using least squares fitting) to a single parameter that provides an objective quantitative estimation of the caries severity. The MPI data can be obtained for tiny points on the dental surface and it is suggested that mapping is possible by scanning method.