The impact on the quality of human life is exerted by both functional disorders of the dentoalveolar system and the aesthetic state, as well as his psychosomatic status. With the help of quality of life indicators, it is possible to evaluate the effectiveness of ongoing treatment and preventive measures in dynamics. People of different ages, genders, religions, and social status may consider different aspects of dental health to be the most signifi cant for the quality of their lives.

   During orthodontic treatment, problems arise that are not related to tooth movement, but rather to the reaction of the periodontal tissues to this movement. This periodontal infl ammation is usually associated with poor oral hygiene, which is frequently the root cause of the problem. However, some orthodontic patients who strictly follow all oral hygiene recommendations complain of "persistent" periodontal infl ammation. As a result, one of the most important aspects of dental practice is the need to consider the presence of concomitant general somatic diseases and their local manifestations in the oral cavity. Diabetes mellitus is one of the most dangerous general somatic diseases. The severity and duration of a patient's diabetes mellitus course have a direct impact on the success of orthodontic treatment.

   The study's goal is to reduce periodontal inflammation in type II diabetes mellitus patients.

   The study's goal is to assess the effect of the developed drug on the glucose content of oral fluid as well as periodontal infl ammation in patients with type II diabetes mellitus.

   To create the landmarks for assessing the age-related change in the position of the third molars 3000 panoramic radiographs of patients in age from 7 to 25 years with different orthodontic anomalies (teeth crowding, teeth arches narrowing, medial and distal occlusion) were studied. The stages of formation of the third molars, angle of inclination of the third molars, position of the third molars relatively to the bisector of the gonial angle, and counterforces of the upper jaw and lower jaw were analyzed. Counterforces of the upper jaw are positioned vertically and do not interfere with the eruption of the upper third molars. If the distance from the counterforce to the third molar germ is more than 2,0 mm and the angle of inclination is more than 700, the eruption of the third molar is possible. But if the distance is not suffi cient enough and the angle of inclination is less than 700, the extraction of third molars is expedient. On behalf of this data, an order for the patent application was accepted and registered in the Russian Federation, registration number 2020144007 (incoming number 082341), on December 28, 2020.The distance from the crowns of the lower third molars to the bisector of the gonial
angle decreases with age. Analysis of the correctional connections of the parameters of the panoramic radiographs showed permanent dependance with age.

   Temporomandibular joint dysfunction is observed in 25–30 % of the human population. The question of whether the temporomandibular joint degenerative diseases influence the patient’s neurological status is increasingly appearing in scientific sources. Patients with temporomandibular joint dysfunction have a higher level of anxiety, fatigue, and decreased sleep quality compared with those who do not have it. This pathological condition requires a multidisciplinary approach in diagnosis and treatment. The pathology significantly reduces the quality of life and affects work capacity. We have studied the structure of the temporomandibular joint in patients with neurological symptoms.

   A method for determining the need for osteopathic treatment in patients with dentoalveolar anomalies and temporomandibular disorders was proposed. We proposed two tests. The first one considers the angle of extension in habitual occlusion while the patient looks down first, and then determines the angle of extension of the neck with an open mouth while the patient looks up. The second one determines the maximum amplitude of the patient's mouth opening in the usual position of the head and neck. Our method identifies the need for complex dental and osteopathic treatment in patients with dentoalveolar anomalies as well as temporomandibular disorders and allows prevention of the development of complications associated with the lack of osteopathic treatment.

   Deep bite is a widely spread type of malocclusion. Treatment of such an anomaly often requires intrusion of the front teeth. Intrusion is possible with such traditional methods as reverse curve archwire. Unfortunately, traditional methods of intrusion have side effects such as movement of anchor teeth and vestibular inclination of teeth that underwent intrusion. That is why in contemporary orthodontics practice, it is preferable to intrude teeth using stable stationary anchorage. It is crucial to consider the biomechanics of tooth movement in this method of treatment.

   The aim of this article is to research the influence of the intrusion of lower incisors with orthodontic miniscrews on the lower dental arch.

   The article "Marginal assessment of the effectiveness of orthodontic treatment of children and adolescents with mesial ratio of dentition" by authors R.A. Fadeev, A.N. Lanina, O.V. Dmitrieva, M.R. Fadeeva presents the practical application of the method of quantitative evaluation of AMORF in the treatment of the mesial ration of dental arches in children and adolescents to determine its effectiveness.

   This article describes a case report of the patient with mandibular retrognathia, class II malocclusion, deep bite, constriction and deformation of dental arches, and retrusion of upper incisors. Due to the patient’s refusal to undergo the orthognathic surgery, after complex diagnostics, it was decided to carry out the orthodontic dentoalveolar compensation. The combined use of the functional fi xed telescopic appliance (FFTA), bracket system and orthodontic miniscrews made it possible to effectively normalise the mandibular position, achieve orthognathic occlusion, normalise the incisors’ proclination and improve the face profi le. This method signifi cantly reduces the invasiveness and duration of orthodontic treatment.

   The goal of the study was to determine the esthetic features of a smile based on the LVI-index in the young people category with and without orthodontic treatment.

   We looked at 60 young people ranging in age from 21 to 24. With an orthognathic kind of tooth closure, 28 patients were chosen. All of the patients were assigned to one of two groups. We computed the optimal value of the Shimbachi index (LVI-index) for all patients by measuring it. In comparison to the group of patients without orthodontic treatment in the anamnesis, deviations from the ideal Shimbachi index were shown to be 2,8 times less common in the young patient category after orthodontic therapy.