Morphological features of various physiological variants of occlusive relationships

Rozhkova M. G., Lepilin A. V., Kondratyuk A. A., Fishchev S. B., Pavlova S. G., Sevastyanov A. V.

Relevance. With anomalies of occlusal relationships, as a rule, the shape and size of the dentoalveolar arches are disturbed [1, 2]. The prevalence of anomalies of the dental arches is quite high and is due to numerous etiological factors [3]. Objective: to study the features of the maxillofacial region, taking into account the protrusion-retrusion type of the dental-alveolar arches of physiological variants of occlusal relationships. Materials and methods. The study group included 108 patients with physiological occlusion of adolescence – Each group was divided into three subgroups. The first subgroup consisted of patients with protrusion type of dental arches, the second - retrusion type arcs, and the third subgroup consisted of patients with Mastroianni type of dento-alveolar arches. The authors propose their own methods of biometrics of diagnostic models made of gypsum, based on the typological features of dental arches. The criteria for the diagnosis and effectiveness of the treatment measures are proposed. Results and discussion. For all types of dento-alveolar arches, the inter-cleft distance on the upper jaw was relatively stable and there were no significant differences in people of different subgroups. At the same time, the main differences were noted when measuring the sagittal and diagonal parameters. In all types of dento-alveolar arches, there were no significantly significant differences in patients of all subgroups when assessing the width of the anterior part of the lower dental arch. The main differences were noted when measuring the sagittal and diagonal parameters. Conclusions. A method for determining the convergence of antimirov in the dental arch, based on the intersection of conventional occlusal lines with the Central sagittal arch, passing through mezhrassovyy point and mid mimoletnoe of the distance measured between the vestibular-distal tubercles of the second permanent molars. To determine the position of the teeth in the vestibular-lingual direction, a method for measuring the incision angle at the intersection of the conditional median verticals of the antagonists on cone-beam computed tomograms, when combined with telerentgenograms in the lateral projection, is proposed.

Keywords:crowding of teeth, plaster models, dentition, orthodontic treatment.