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    STUDIA PHYSICA - Ediţia nr.2 din 2009  
         
  Articol:   FT-MICRO RAMAN PROSPECTS ON FLUORIDE-TREATMENT INFLUENCE ON HUMAN TEETH.

Autori:  SIMONA CINTĂ PÂNZARU, N. HAR, M.M. VENTER, N. STATOV. 		 
       
         
  Rezumat:  The aim of the present work was to investigate how the native signal observed in the micro-Raman spectra of tooth enamel and dentin is associated with the conservation procedure after extraction as well as with the fluorinated treatment. This was achieved by analyzing the Raman and IR signal associated with organic components of tooth enamel and dentin, in natural and fluorinated specimens of human permanent molar or children specimen samples. The inorganic/organic content of the two tissues was monitored using the relative intensity ratio of the (PO4)3-, (C-H) and (CO3)2- modes from 958, 2938 and 1446 cm-1 respectively. Three different teeth specimens were analyzed after common extraction. The micro-Raman signal was unaffected by the alcohol or methylen blue preservation procedure. The expected vibrational mode of CaF2 associated to the OH <—> F diffusive exchange was observed as a very weak band in the micro-Raman spectra of enamel after the fluorinated treatment. The fluorinated procedure certainly did not seem to be favored for an increase in the CaF2 instead, an increase in the crystallinity degree has been concluded, based on the relative intensity ratio and spectral shape of the mineral modes.

Keywords: hydroxyapatite, F-treatment, dentin, enamel, FT-Raman micro-spectroscopy 		 
         
     
         
         
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