In this study, laser induced breakdown spectroscopy is used to investigate the possibility of discrimination of healthy and carious teeth. This feasibility is examined using multivariate statistical analysis called partial least square discriminant analysis (PLS-DA). It is based on atomic and ionic emission lines of LIBS spectra of teeth belonging to P, Ca, Mg, Zn, K, Sr, C, Na, H, O elements. Our results show well discrimination and also prediction of unknown tooth tissues. So, it shows the ability of LIBS in classification of healthy and carious teeth using PLS-DA method and its feasibility in future clinical applications.

Keywords: Emission line, Laser induced breakdown spectroscopy, Partial least square discriminant analysis, Tissue differentiation

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