Introduction. Periodontal tissue disease is one of the most common dental pathologies, which among young people occurs with a frequency of 60% to 99%. Therefore, the problem of finding new links in the pathogenesis, the reasons for the growing prevalence of periodontal disease, as well as effective methods for its early diagnosis and prevention, is relevant. Objectives. Establish the possibility of using individual stomatological and psychophysiological features to predict the development of periodontal disease. Materials and methods. 156 students aged 18-23 years old without systemic diseases were surveyed for some features of oral hygiene and nutrition. Also the study subjects underwent a dental examination, psychological testing and the assessment of individual typological features of higher nervous activity and autonomous regulation. The model for statistical prediction were designed using neural networks. Results. Two neural networks were designed with the best predictors among dental history and examination, psychological testing, parameters of higher nervous activity and heart rate variability analysis. The diagnostic sensitivity of the first prognostic model was 83.33 % and the specificity was 92.31 %. The second model was characterized by 90.00 % sensitivity and 78.57 % specificity. Conclusion. The method of modeling using neural networks based on the index assessment of the condition of teeth hard tissues, the level of oral hygiene and the evaluation of psychophysiological features can effectively predict the risk of periodontal disease development in young people
The aim: To establish criteria for individual thermal sensitivity in almost healthy individuals aged 17-20 years. Materials and methods: We surveyed 150 people aged 17-20 years. Heat sensitivity was previously assessed using our adapted questionnaire «Levels of heat sensitivity», in which according to the scale the number of points 0-6 indicates reduced heat sensitivity, 7-16 points - increased). All respondents underwent thermal testing. The subjects had auscultatory determination of pulse rate and blood pressure, after which the hands of both hands were immersed in a container with warm water (45° C) for 3 minutes. At the 2nd minute, pulse rate and blood pressure were determined. this procedure was repeated after the hands were removed from the water, and every 2 minutes until the pulse and blood pressure recovered over time. Before and after the heat test, a mathematical analysis of heart rate was performed using a computer software package, according to the manufacturer›s instructions. Results: After conducting a thermal test in people with hypersensitivity, an increase in the average values of heart rate and blood pressure. In the group of people with lower sensitivity to heat, heart rate and blood pressure after the heat test decreased or did not change. As a result of statistical processing of data from mathematical analysis of heart rate, it was found that in persons with hypersensitivity after the thermal test increased activity of the sympathetic nervous system, while in subjects with reduced sensitivity to heat showed a slight advantage of parasympathetic nervous system. Conclusions: Increased activity of the sympathetic nervous system in response to heat in people with hypersensitivity indicates the development of stress, and given the current trend towards long-term and constant increase in average annual temperature, this will lead to overstrain of regulatory mechanisms, depletion of functional reserves and reduced adaptability . Therefore, people with high heat sensitivity are particularly vulnerable to global climate change.
Реферат: У роботі досліджено особливості реакції периферичного кровообігу під час проведення холодової проби у молодих осіб віком 18-22 роки різних соматотипів із нормальним та підвищеним артеріальним тиском (систолічний-130 мм рт. ст. і/або діастолічний-85 мм рт. ст.). Серед переважної більшості обстежених негативну холодову пробу виявлено у осіб із нормальним артеріальним тиском, що свідчить про фізіологічну реакцію судин на вплив холоду. В осіб із підвищеним артеріальним тиском відсоток випадків негативної холодової проби був істотно меншим. Особливістю реакції судинного русла на дію холоду за підвищеного артеріального тиску у осіб із ендоморфною будовою тіла був розвиток спастичних процесів. Результати проведення холодової проби показали, що для досліджуваних із домінуванням ектоморфної частки соматотипу та підвищеним артеріальним тиском характерні гіпотонічні реакції, а для осіб із мезоморфною будовою тіла та підвищеним артеріальним тиском-змішаний тип реакцій. Ключові слова: холодова проба, артеріальний тиск, соматотип, артеріальна гіпертензія, периферичний кровообіг.
Background. The individual and typological features of the central nervous system are interpreted as highly genetically determined. Each somatotype is characterized by morphofunctional features of the activity of different systems, including the circulatory system. Objective. The aim of the research was to study the features of the main individual and typological parameters of higher nervous activity in persons of different somatotype with normal and high blood pressure (BP). Methods. In the control group of the surveyed patients the BP value corresponded to the optimal level according to the WHO classification (125 people). The second group consisted of individuals, whose systolic blood pressure exceeded 130 mmHg at the time of the study and (or) diastolic – 85 mmHg (135 people). Somatotyping technique by Carter and Heath was used. Functional mobility (FMNP) and strength of nervous processes (SNP) were determined using the Diagnost-1 program (Makarenko and Lizogub). Results. In the individuals with predominance of ecto- and mesomorphic somatotype component, higher levels of major nervous processes were reported in response to strenuous processing of information, which was associated with more advanced mechanisms of information processing, its neurophysiological support. In people with endomorphic somatotype the lower levels of FMNP and SNP were clearly detected that could indicate that the speed characteristics of the nervous processes in them are at a lower level. Conclusions. In normal blood pressure, the highest indicator of FMNP was found in the individuals with predominance of ecto- and mesomorphic component. In the group with high blood pressure, the indicator at the level below the average was in endomorphs. Predominance of the ectomorphic component tended to increase in the surveyed, and in the mesomorphs was at the average level. The lowest level of SNP was found in the individuals with endomorphic somatotype of both groups.
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