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

Pavel V. Seredin; Vladimir M.  Kashkarov; Anatoly N. Lukin; Dmitry L. Goloshchapov; Al-Zubaidi Asaad Abdulhussein; Yuri A. Ippolitov; Robert Julian; Doyle Stephen

Authors

Pavel V. Seredin Cand. Sci. (Phys.-Math.), Senior Researcher, Department of Solid State Physic and Nanostructures, Voronezh State University; e-mail: paul@phys. vsu.ru
Vladimir M. Kashkarov Cand. Sci. (Phys.-Math.), Associate Professor, Department of Solid State Physic and Nanostructures, Voronezh State University; tel.: (473) 2208363, e-mail: kash@phys.vsu.ru
Anatoly N. Lukin Cand. Sci. (Phys.-Math.), Associate Professor, Department of Solid State Physic and Nanostructures, Voronezh State University; tel.: (473) 2208363, e-mail: alukin@phys.vsu.ru
Dmitry L. Goloshchapov postgraduate student, Department of Solid State Physic and Nanostructures, Voronezh State University
Al-Zubaidi Asaad Abdulhussein postgraduate student, Department of Solid State Physic and Nanostructures, Voronezh State University
Yuri A. Ippolitov Cand. Sci. (Medical), Senior Researcher, Associate Professor, Department of Dental Research, Voronezh State Medical Academy; e-mail: stomat@ vmail.ru
Robert Julian Cand. Sci. (Phys. — Math.), Senior Researcher, Synchrotron Radiation Center, Stoughton, WI, USA
Doyle Stephen Cand. Sci. (Phys. — Math.), Senior Researcher, Synchrotron Light Source ANKA, Eggenstein- Leopoldshafen, Germany

Keywords:

hydroxyapatite, human dental enamel; caries; synchrotron radiation; XRD; FTIR.

Abstract

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.