[Changes in the morphological characteristics of the endodontic system and parameters of human dental hard tissues in the North-Western region of Siberia during the X-XX centuries].

The Aim Of The Study: Was a comparative analysis of the structural features of the endodontic system and the thickness of hard dental tissues over the past ten centuries.

Materials And Methods: 180 teeth of people who lived from the X to XX centuries AD were studied using cone-beam computed tomography in endodontic mode: the volume of the endodontic system and the thickness of hard dental tissues were calculated using the algorithm developed by us. The Pearson correlation coefficient and Student's t-test were calculated in Excel program, and the data was analyzed with GraphPad Prism 8 Statistics Guide statistical program.

Oxidation of Ceramic Materials Based on HfB-SiC under the Influence of Supersonic CO Jets and Additional Laser Heating.

The features of oxidation of ultra-high-temperature ceramic material HfB-30 vol.%SiC modified with 1 vol.% graphene as a result of supersonic flow of dissociated CO (generated with the use of high-frequency induction plasmatron), as well as under the influence of combined heating by high-speed CO jets and ytterbium laser radiation, were studied for the first time.

EGF, TGF- and Amphiregulin Differently Regulate Endometrium-Derived Mesenchymal Stromal/Stem Cells.

The prototypical receptor tyrosine kinase epidermal growth factor receptor (EGFR) is regulated by a set of its ligands, which determines the specificity of signaling and intracellular fate of the receptor. The EGFR signaling system is well characterized in immortalized cell lines such as HeLa derived from tumor tissues, but much less is known about EGFR function in untransformed multipotent stromal/stem cells (MSCs). We compared the effect of epidermal growth factor (EGF), transforming growth factor-α (TGF-α) and amphiregulin (AREG) on physiological responses in endometrial MSCs (enMSC) and HeLa cells.

Single photon emission computed tomography-computed tomography visualization of sentinel lymph nodes for lymph flow guided nodal irradiation in oral tongue cancer.

Purpose: To evaluate correlation of single photon emission computed tomography-computed tomography (SPECT-CT) data on lymph flow (LF) from oral tongue cancer (OC) and the topography of lymph nodes (LN) metastases; to determine the clinical value of lymph flow guided radiotherapy (LFGRT).

Materials And Methods: SPECT-CT visualization of LF from the OC lesions was performed after peritumoral injection of 99mTc-phytate in 26 primary patients with clinical stage cT1-2N0M0 disease. We determined the individual drainage (unilateral/bilateral) from the tumor, and localization of sentinel LNs according to the neck levels.

Educational Collaboration Between Russian-Born US Physicians and Russian Oncology Trainees in Evidence-Based Medicine: The Higher School of Oncology.

Purpose: The 2-year Russian oncology residency focuses on diagnosis and treatment of malignancies but lacks evidence-based medicine (EBM) and patient communication skills (PCS) training. To overcome these educational disparities, the 5-year national program, the Higher School of Oncology (HSO), involving Russian expatriate physicians trained in the United States was established.

Methods: A retrospective study was conducted.