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Документ Functional condition of masseters muscles of patients with class II subdivision(Aluna Publishing, 2017) Kuroedova, V. D.; Makarova, A. N.; Chicor, T. A.; Куроєдова, Віра Дмитрівна; Макарова, Олександра Миколаївна; Чикор, Тетяна ОлександрівнаIntroduction: Main functional characteristics of masticator muscles in patients with class II malocclusions is activity dominance of m. temporalis in comparison with m. Masseter. We have not found datum about functional status of the masticators in patients with class II subdivision. The aim: The purpose of our study was to investigate the functional characteristics of m. Masseter, m. temporalis in adult patients with class II subdivision malocclusion. Materials and methods: There have been carried out the surface electromyographic study of m. masseter, m. temporalis in 17 adult patients with class II subdivision. It was realized quantitative analysis of 271 electromyogram, it was determined the average bioelectric activity index activity, symmetry and torsion index. Results: It was observed predominance of the bioelectrical activity of m. temporales on m. masseter for all persons with class II subdivision. Bioelectrical activity for m. masseter was bigger on side of distal ratio and for m. tennporales on side of neutral ratio. In class II subdivision right, the mandible was deviated to the left side and in class II subdivision left is deviated to the right side. Thus, rotational moment generated during compression of the jaws, causes deviation of the lower jaw to the side, with a neutral molar ratio. During voluntary chewing bioelectrical activity of m. masseter and m. temporalis was higher in the right side. Conclusion: In accordance with the functional condition of the masticatory muscles of class.Документ Optical density of upper jaw in patients with malocclusion(2017) Kuroedova, V. D.; Vyzhenko, E. E.; Makarova, A. N.; Galych, L. B.; Chicor, T. A.; Куроєдова, Віра Дмитрівна; Виженко, Євгеній Євгенович; Макарова, Олександра Миколаївна; Галич, Людмила Борисівна; Чикор, Тетяна ОлександрівнаIntroduction: The growth and formation of facial skeleton is in interrelation with growth of cervical spine. Computer tomography plays an important role to examine and investigate the density of bony tissue resulting from total increase of osteopenic diseases and diseases of periodontal tissue. The aim of the paper is to compare indices of mineral density of bony tissue of the upper jaw and mineral density of the second cervical vertebra in patients with malocclusion. Materials and Methods: 37 orthodontic patients were involved in the investigation. They were divided into three age groups depending on the period of formation of dentofacial system. Density measurement of bone of the second cervical vertebra was done and also density measurement of upper jaw in the area of alveolar process between central incisors, canines and the first premolar on the level of the middle of roots, in the area of the first molars under the level of bifurcation and in cusp was performed. Results: Optical density of bone of the second cervical vertebra with age increases from 501±61,06 to 587,6±48,81. The densest area on the upper jaw is alveolar process between central incisors, which increases with age from 1045,14±59,81 to 1318±69,28. The least indices of optical density were determined in area of the cusp of the upper jaw: the first group presented 174,21±38,94, and the third one included 338,87±26,91. Conclusions: Densitometry of bony tissue with computer tomography is diagnostically informative and available method for investigation and it can be used for diagnostics of bony tissue condition and for evaluation of orthodontic treatment.