Kostiuchenko-Faifor O. Teleroentgenographic characteristics of the upper respiratory tract in persons of youthful age with an orthognathic bite without and taking into account the type of face.

Kostiuchenko-Faifor O. S. Teleroentgenographic characteristics of the upper respiratory tract in persons of youthful age with an orthognathic bite without and taking into account the type of face. – Qualifying scientific work on the rights of the manuscript. Dissertation for the degree Doctor of Philosophy in the field of knowledge 22 «Health Care» in specialty 222 «Medicine». – National Pirogov Memorial Medical University, Vinnytsya Ministry of Health of Ukraine, Vinnytsia, 2025. For the first time, the limits of the percentile range of teleroentgenometric parameters of the nasopharynx, oropharynx, larynx, soft palate, tongue, and the position of the hyoid bone in Ukrainian young men (YM) (n=49, age - from 17 to 21 years) and young women (YW) (n=76, aged 16 to 20 years) with an orthognathic bite without pathology of the upper respiratory tract without and taking into account the type of face were found. No reliable or trending differences in the cephalometric parameters of the nasopharynx, oropharynx, and larynx were found between different facial types in both Ukrainian YW and YM with orthognathic bite without upper respiratory tract pathology. For the first time, pronounced manifestations of sexual dimorphism (higher values in YM) of the size of the lower oropharyngeal space were established in representatives without taking into account the type of face by 13.8 %, with a wide face – by 11.6 % and with a narrow face type – by 15.9 %; as well as the area of the upper respiratory area in representatives without taking into account the type of face by 20. 6%, with a very wide face – by 21.2 %, with a wide face – by 21. 6% and with an average face type – by 23.1 %. For the first time, reliable or trend differences in teleroentgenometric parameters of the soft palate were established between YM or between YW with different facial types. For the first time, reliable or trend differences in teleroentgenometric parameters of the hyoid bone and tongue between YM or between YW with different facial types were established. For the first time in Ukrainian YM and YW, multiple mainly direct moderate and strong correlations between most cephalometric characteristics of the upper respiratory tract or the tongue, moderate negative correlations between the distance of the glossopharyngeal space and the area of the upper respiratory tract with the thickness and area of the soft palate, as well as between the inclination angle of the soft palate and most tongue characteristics, direct mainly moderate correlations between cephalometric characteristics of the upper respiratory tract and the hyoid bone or tongue and between cephalometric characteristics of the hyoid bone and tongue. For the first time in Ukrainian YM and YW with a broad face type there are mainly direct moderate and strong correlations between most cephalometric characteristics of the upper airways, direct, mainly moderate correlations between the position of the hyoid bone relative to the spine horizontally, the position of the hyoid bone relative to the mandibular plane vertically or tongue length and most cephalometric characteristics of the upper airways, primarily moderate negative correlations between most cephalometric characteristics of the soft palate and the tongue and mainly direct moderate correlations between most cephalometric characteristics of the hyoid and the tongue, direct moderate and strong correlations between the position of the hyoid bone relative to the spine horizontally and practically all cephalometric characteristics of the upper airways, as well as direct moderate correlations between the length of the soft palate or the position of the hyoid bone relative to the Frankfurt plane vertically and most tongue characteristics. For the first time in Ukrainian YW with a very broad face type, the following multiple significant and moderate non-significant correlations have been established. There are mainly direct strong and moderate correlations between most cephalometric characteristics of the upper airways. There are negative strong and moderate correlations, as well as direct strong and moderate correlations between most cephalometric characteristics of the soft palate. For the first time stepwise regression analysis has been used to develop and analyze highly informative models of the area of the upper airway, soft palate, and tongue based on linear and angular cephalometric indicators of the upper airways in Ukrainian YW and YM with an orthognathic bite, regardless of face type and with a broad face type, as well as in YW with a very broad face type.