Pavel Timchenko's research while affiliated with Samara National Research University and other places

The results of experimental studies of the tissues of teeth with periodontitis, using the Raman spectroscopy method, are presented in this work. Spectral changes in the tissues of teeth with periodontitis were identified, and the results can be used for the correction of treatment of this disease in dental practice. Criteria for the noninvasive diagnosis of periodontitis, based on changes in tooth enamel spectral properties, were developed. © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

This paper presents the results of expanded analysis after the experimental researches with the samples femoral bones of rabbits in distal epiphysis area using the Raman spectroscopy method. It has been found that values of the optical ratios characterized by reduction of Raman bands during transition from the intact cartilage zone to the PFP plasty region on the wave numbers 956 cm ⁻¹ (PO 3 ⁻⁴ (symmetric stretching phosphate oscillation)), 1069 cm ⁻¹ (CO 3 ²⁻ (C-O planar stretching vibration)) and relatively constant coefficients on the wavenumbers 852 cm ⁻¹ (Proline), 1250 cm ⁻¹ (Amid III), 1587 cm ⁻¹ (Amid II) и 1660 cm ⁻¹ (Amid I ), and also on the 1745 cm ⁻¹ ((C=O) Lipids).