RESEARCH HYDROXYAPATITE CRYSTALS AND ORGANIC COMPONENTS OF HARD TOOTH TISSUES AFFECTED BY DENTAL CARIES USING FTIR-MICROSPECTROSCOPY AND XRD‑MICRODIFFRACTION

Аннотация

Investigations of the intact dental enamel as well as carious-affected human dental enamel were performed in the work with the use of IR-spectromicroscopy and X-ray diffraction applying synchrotron radiation. Caries of enamel was shown to be characterized by an increase of the number of deformation and valence vibrations for N-C-O, N-H and C=O bounds, decrease of crystallinity index and by the absence of the preferable orientation of hydroxyapatite (HAP) crystals within the affected enamel. It indicates the presence of the destructive processes in the organic matrix of hard tooth tissues.