Features of the angular parameters of the gnatic part of the face in different periods of ontogenesis, taking into account the variability of the mandibular angle

The variability of the parameters of the maxillofacial region in cases of occlusion anomalies in the vertical direction requires improved diagnostic methods. Goal. To determine the features of the angular parameters of the gnatic part of the face in different periods of ontogenesis, taking into account the variability of the mandibular angle. Materials and methods. An analysis of 75 telerentgenograms was carried out, of which 59 cases showed physiological occlusion and 16 telerentgenograms with anomalies of occlusion in the vertical direction. The angle of the gnathic region of the face was estimated, formed by the intersection of the line connecting the point of the anterior nasal spine with the upper point of the articular head SNA-Cond and the line extending from the articular point to the tip of the root of the inferior medial incisor Cond-Api. The angle of the lower jaw and its component parts were measured. The statistical analysis determined the average values and the error M ± m. Results and discussion. As a result of the study of telerentgenograms of young people with physiological bite, the angle of the gnatic part of the face SNA-Cond-Api averaged (29.96 ± 0.84)° for the group. The magnitude of the main angle of the gnatic part of the face SNA-Cond-Api, both in the milk and in the changeable bite, was normally (30.02 ± 1.25)°. This indicator served as a guideline for the diagnosis of occlusion anomalies in the vertical direction, while the magnitude of the main angle differed from the optimal values up or down. During the analysis of telerentgenograms in various periods of ontogenesis, taking into account the parameters of the mandibular angle, the main parameters of the gnathic region of the face, characterizing its optimal angular parameters, were determined. Conclusion. The relative stability of the magnitude of the main angle of the gnathic part of the face SNA-Cond-Api in the range from 28 to 32° is characteristic of physiological occlusion and for dental-alveolar forms of occlusion anomalies. A change in the angle parameters to a lesser or greater side is characteristic of occlusion anomalies in the vertical direction, which can be used for the differential diagnosis of vertical anomalies of gnathicand dentoalveolar forms of pathology.