Abstract:
The widespread use of methods of cephalometric analysis in practical orthodontics
requires the adaptation of normative indicators for members of the local ethnic group. It
is also important to study the relationships between cranial and odontometric parameters
to understand the effects of these components on each other. The aim of the study was to
establish the peculiarities of correlations between the characteristics of basal cranial
structures determined by Bjork and Jarabak methods with teleradiographic parameters
of the upper and lower jaws and the location of teeth in Ukrainian young men and young
women with orthognathic occlusion. Teleradiography was performed in the mode of
cephalometric examination of 49 young men (aged 17 to 21 years) and 76 young women
(aged 16 to 20 years) who had a physiological bite as close as possible to orthognathic.
Cephalometric analysis according to modifications of Jarabak J. R. - Roth-Jarabak and
Bjork A. - CFT-Bjork methods, performed using OnyxCeph 3 ™ software, 3DPro version,
Image Instruments GmbH, Germany (software license No URSQ-1799). All indicators
were divided into three groups according to Dmitriev M. O. (2017): the first group included
metric characteristics of the skull, which are used as basic indicators in the methods of
cephalometric analysis; to the second group - dental-maxillary in which the skeleton has
already been formed and which surgical methods can change the length, width, angles
and positions of the upper and lower jaws; to the third group - indicators that actually
characterize the position of each individual tooth relative to each other, cranial structures
and the profile of the soft tissues of the face. Correlation assessment was performed in
the license package "Statistica 6.0" using the non-parametric Spearman method. As a
result of the conducted researches in Ukrainian young men and young women with
orthognathic occlusion the peculiarities of multiple correlations of characteristics of
basal cranial structures determined by CFT-Bjork and Roth-Jarabak methods with
teleradiographic parameters of upper and lower jaws and tooth location were established.
Both the CFT-Bjork method and the Roth-Jarabak method have more reliable correlations
in both young men and young women between the first and second groups (23.3 % for
young men and 50.0 % for young women for CFT-Bjork and 48.4 % for young men and
41.1% for young women according to Roth-Jarabak) than between the indicators of the
first and third groups (respectively 12.8 % for young men and 7.7 % for young women for
CFT-Bjork and 22.5 % for young men and 12.5 % for young women for Roth-Jarabak).
The expressed manifestations of sexual dimorphism of the received correlations between
the indicators defined by CFT-Bjork and Roth-Jarabak methods both on quantity and
force, and in some cases on a direction of correlations are established.
