Background. Studies devoted to the analysis of the odontological features of paleoanthropological material and modern population reveal epochal changes in dental structures, as well as ethnic and specific features of the population of individual regions. The study of odontological structures of different epochs allows to obtain information about the reduction and its speed, as well as the prevalence of dental anomalies in individual regions. Aim. To identify the changeability of the values of the dimensional parameters of maxillary teeth of the population of the city of Krasnoyarsk, taking into account the time vector. Materials and methods. The current odontometric study was conducted on the modern population of Krasnoyarsk (n=331), the craniological material of the Pokrovsky Necropolis (XVII century, n=73), and the Vsekhsvyatskiy Necropolis (XVIII­–XIX centuries, n=50). The study was carried out on mesiodistal (MDcor) and vestibulo-oral (VOcor) crown diameters. The modules of teeth crowns (mcor) and the average module of dental crown (mcor M(1-3) (according to the modules of molar crowns) were calculated to characterize the dimensional parameters of teeth crowns in each group in order to determine the general characteristics of the absolute size of the teeth in the jaw. Results. Both in female and male samples, the reduction of mesio-distal and vestibulo-oral diameters of some teeth, and accordingly, the reduction of teeth-crown module was revealed. The reduction of maxillary teeth-crown module among the population of Krasnoyarsk of the XVII–XIX is more marked among women. The crown module of right maxillary canine (13 tooth) reduced by 6.41% among women and 3.03% among men by the XXI century. The crown module of 23 tooth reduced by 6,43 % and 2,77% among women and men respectively. Significant reduction of teeth-crown dimensions and modules of teeth 25, 26, 27 by 4,62%, 3,17 % and 1,55% is typical for women, whereas this tendency is not specific to men. Conclusions. The analysis of the variability of maxillary teeth-crown modules confirmed the ongoing processes of teeth reduction. The obtained dimensions of the average maxillary teeth-crown module reveal the microdontia in females and mesodontia in males.

The study of evolutionary changes in human teeth is relevant from the point of view of identifying the geographical, ethnic, constitutional and sexual variability of the dentoalveolar system as a whole. The results of such studies can be used to predict the prevalence of anomalies and deformities of teeth, taking into account their epochal variability. The purpose of the study was to study the variability of the values ​​of odontometric parameters of the teeth of the female population of the city of Krasnoyarsk in the 17th–21st centuries. The studied odontological materials (55 samples) were obtained during archaeological excavations of the necropolises of the city of Krasnoyarsk: 32 samples from the materials of the Pokrovsky necropolis of the 17th–18th centuries; 23 - from the materials of the Vsekhsvyatsky Necropolis of 18th–19th centuries. In addition, the data of studies of modern women (188 people) aged 21-35 years old, who were examined at the Department of Therapeutic Dentistry of the Professor Voyno-Yasenetsky Krasnoyarsk State Medical University. Within the framework of the study, the vestibulo-oral and mesio-distal diameters of the crowns of the teeth of the upper and lower jaws were studied, taking into account their group affiliation, anatomical shape, according to the method of Russian anthropologist Aleksandr Zubov. Statistical analysis included non-parametric methods of descriptive statistics and methods for comparing two or more independent samples. Analysis of the variability of the vestibulo-oral diameter of the crowns in the functional group of the molars of the upper and lower jaws showed a stable process of reduction. The mesio-distal diameter of the incisor crowns differed statistically significantly only for the teeth of the lower jaw. A statistically significant decrease in the values ​​of the median of the vestibulo-oral crown diameter was found in all key teeth of this group. The greatest reduction changes were registered in the first molars of the upper jaw. The first lower molars of representatives of different centuries did not have statistically significant differences in the size of the mesio-distal size of the crown of these teeth, as well as premolars. A comparative analysis of the obtained odontometric characteristics of the teeth showed a general trend towards a decrease in the size of the teeth of the female population of the Krasnoyarsk City, taking into account the time vector, which is a confirmation of the epochal reduction of the dentition.