Совершенствование стоматологических технологий требует переоценки необходимости применения старых материалов для лечения и протезирования. При использовании разнородных металлических ортопедических конструкций в зубочелюстном протезировании развиваются местные реакции на металлы и возникают дерматиты, связанные с микротоками. Цель. Оценить характер и выраженность метаболических сдвигов в ротовой полости и их связь с используемыми для протезирования материалами. Методика. В исследовании приняли участие 133 пациента старше 60 лет, которые условно были разделены на 4 группы в зависимости от наличия или отсутствия металлических/пластиковых конструкций. Были получены рото-глоточные смывы, субфракционный состав которых исследовали на приборе «Лазерный корреляционный спектрометр ЛКС-03» (Интокс, РФ). Результаты. Протезирование с использованием одного металла приводит к возрастанию частоты встречаемости интоксикационноподобных сдвигов, а двух - аллерго- и дистрофическиподобных, чего в случае применения пластмасс не наблюдали.
Improving dental technology requires reassessment of the use of old materials for treatment and prosthetics. Heterogeneous metal orthopedic structures in tooth-jaw prosthetics may induce local reactions to metals and dermatitis associated with microcurrents. Aim. To evaluate the nature and severity of metabolic changes in the oral cavity and their relationship with the materials used for prosthetics. Methods. The study involved 133 patients older than 60 who were conventionally divided into 4 groups based on the presence or absence of metal / plastic structures. Subfractional composition of oropharyngeal washouts was studied using an LCS-03 laser correlation spectrometer (Intox, Russia). Results. Prosthetics with a single metal increases the incidence of intoxication-like changes whereas using two metals increases allergic and dystrophic-like disorders, which was not observed in using plastics.
Indicators of the cardiovascular system, including heart rate (HR) and blood pressure (BP) variability parameters, were analyzed in primary school students with different computer screen times. The study included 4084 students of grades 1–4 (age 7–12 years) from 66 Moscow schools. The screen time at school and out of school was assessed by teachers, based on the national Sanitary Rules and Regulations: 0, no screen time; 1, screen time matching hygienic standards; 2, screen time at least twice greater than recommended. Physiological examinations were carried out by spiroarteriocardiorhythmography with a face mask, the conditions corresponding to the functional stress test (mild hypercapnia/hypoxia). Testing took place in spring and autumn (independent samples). Statistical data processing was performed using nonparametric criteria. It was revealed that the introduction of computer technologies in school lessons within the limits of hygienic standards was accompanied by an increase, within the normal range, of systolic BP in girls at the end of grade 2 and 4 and in boys at the beginning and end of grade 4. Screen time at least twice higher than the hygienic standard did not have an additional effect on BP, but provoked shifts in the function of autonomic regulation. Boys were more sensitive to the influence of this environmental factor. Their pattern of seasonal variability in total power (TP) of the HR variability spectrum was reversed compared to that of children who did not use computers at school; i.e., higher TP values were observed in spring. In grade 4, the process was accompanied by an increase in spontaneous arterial baroreflex sensitivity and a decrease in the relative power of the LF range in the variability spectrum of systolic BP. The changes were assumed to reflect the adaptive response to changes in educational environment.
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