Determination of normative cephalometric parameters according to the Downs method for Ukrainian young men and young women with different face types

Orthodontics is a rapidly evolving branch of dentistry in both theoretical and practical areas. Modern instrumental research methods used in it organically coexist with the already classical ones, perfectly complementing each other. It is such a classic method that is actively used in the practice of orthodontics is cephalometric analysis, which nevertheless requires updates over time and the emergence of new scientific data. The aim of the study was to establish the limits of percentile range and features of cephalometric parameters according to the Downs method in Ukrainian young men and young women with orthognathic occlusion depending on the type of face. 49 young men and 76 young women with orthognathic occlusion underwent a cephalometric study using the Downs method in OnyxCeph³™ software, 3DPro version, Image Instruments GmbH, Germany (license № URSQ-1799). The division into facial types was performed using the Garson index. The licensed statistical package "Statistica 6.0" using non-parametric assessment methods analyzed the second (characteristics of the jaws by the method of Downs) and the third (indicators by the method of Downs that characterize the position of the teeth) groups of indicators. Studies have shown that most of the reliable or tendencies of differences in cephalometric parameters by the method of Downs in both young men and young women (more pronounced) with orthognathic occlusion, between different types of faces belong to the second group of indicators (dental characteristics of which surgical methods you can change the length, width, angles and positions of the upper and lower jaws). Manifestations of sexual dimorphism of cephalometric parameters by the method of Downs between young men and young women with appropriate facial types are insignificant and also, in almost all cases, belong to the second group of indicators. The established limits of percentile scope and features of cephalometric parameters according to the Downs method in Ukrainian young men and young women with orthognathic occlusion depending on the type of face will improve the existing methods of treatment of dental patients.