[The mechanical models of the physiology of teeth].

Based on the universal laws of mechanics and physical chemistry, physiology build mechanical models of teeth, which allowed to explain the role of mastication in the mechanism of demineralization and remineralization of hard tissues of teeth and asymmetry of erasing their working surfaces. In the process of chewing capillary and baric effects contribute to changes in calcium and phosphorus on the working side of the tooth, reaching 30% for any chemical composition of food. Erasing the working surfaces of lower teeth contributes to their specific role in the mechanical and chemical mechanisms of degradation of food due to the mobility of the mandible.

[Interrelation between personal characteristics of students and the successfulness of their training].

The main individual and typological personality characteristics of 246 female and 120 male students were determined with psychological tests. The results were compared to the measure of the successfulness of their training, determined as the mean score of the three last exam sessions. In both groups, failure-avoidance motivation dominated in 62% of students, while success-achievement motivation dominated in 37% of students. Factorial and other kinds of analysis, differentiated according to sex and this index, make it possible to associate the degree of successfulness on the exam with the typological characteristics of students according to extraversion-introversion and neurotism indices.

[Problems in the identification and recording of patients with tuberculosis in investigatory solitary cells].

The analysis of the results of the detection, diagnosis, and recording of patients with active tuberculosis in an investigatory solitary cells of the Department of Penitentiary Facilities, Ministry of Justice of the Republic of Moldova, has revealed significant features that greatly differ not only from such a direction of work in the health care facilities, but also from other institutions (penal colonies, settlements) of this system. These features are associated with the specificity of the working conditions of investigatory solitary cells and mainly with the constant change of this contingent.

[The dynamics of pain perception under conditions of goal-directed activities]. / Dinamika vospriiatiia boli v usloviiakh tselenapravlennoi deiatel'nosti.

The dynamics of nociception was studied in young male volunteer students with different indices of extraversion and neurotism under conditions of their relative psychoemotional rests and psychoemotional tension induced by academic exams and blood-donation procedures. The averaged somatosensory potentials evoked by threshold electrodermal pain stimuli were recorded in the state of rest and during performance of computer-adapted proof-reading test. In ambivalent, sanguine, choleric, and phlegmatic persons the mean values of nociception thresholds differed between testing situations and rest. Processual motivation diminished pain perception. Characteristics of the evoked responses changed depending on the individual typological properties and motivation-determined states. The dynamics of pain subjective evaluation was different in subjects with different individual typological characteristics.

[Population migration and tuberculosis]. / Migratsiia naseleniia i tuberkulez.

Characteristic features of a migratory process of tuberculosis patients in the Republic of Moldova were subjected to study. Two tendencies have been revealed: growth of a number of the arriving subjects and deterioration of the structure of pulmonary tuberculosis among them. Patients who arrived from the places of confinement where morbidity persists on a high level constitute a particular hazard concerning tuberculosis dissemination. Certain organization measures have been taken. The epidemiologic situation for tuberculosis in the penitentiary-labour establishments at the republican Ministry of Internal Affairs was subjected to a comprehensive analysis with subsequent discussion of the results at a meeting of the staff of the Ministry of Public Health; instruction and plan of measures to be taken have been compiled by both ministries; a permanent board has been instituted for rendering help to medical workers of the penitentiary establishments; all law-protective organs have been involved in tuberculosis control; a specialized institution has been set up with a hospital for 200 beds intended for skilled examination and treatment of patients. As a result, the index of tuberculosis morbidity in the republican penitentiary-labour establishments reduced by more than half to promote an improvement of the epidemiologic situation in the republic.

[Use of the automated system of information processing in tuberculosis control]. / Ispol'zovanie avtomaticheskoi sistemy obrabotki informatsii v protivotuberkuleznoi rabote.

A notification variant has been designed on the basis of the No. 089 form "Notification of a patient with newly diagnosed active tuberculosis", which is used for information feeding into computer on persons with newly diagnosed tuberculosis and on those registered in a dispensary; it is also used as a corrective coupon. The automated system for information processing "Tuberculosis" has been developed which allows a centralized control over the early detection and dispensarization of patients, efficient assessment of the accumulated information and proper decision making. The effectiveness of the electronic devices used in dispensary work can be improved on the condition that phthisiologists are provided with personal computers.

[Organization of BCG revaccination of young adults]. / Organizatsiia revaktsinatsii BTsZh lits molodogo vozrasta.

For the purpose of BCG revaccination of the young people (aged 13-30 years) having a negative tuberculin response, 3 methods of vaccination were practised, including working as a team, launching an expedition and functioning within a residential area. The choice of the method required is dictated by the local conditions and the given task. A high level of tuberculosis infection was recorded, especially among the risk groups in relation to this disease. The circumstances to be taken into account when planning the tuberculosis prevention measures, i. e. BCG revaccination, are defined.

[Effect of catecholamines and their antagonists on the responses of the dental areas of the cerebral cortex evoked by dental pulp stimulation in the rabbit]. / Vliianie nekotorykh katekholaminov i ikh antagonistov na vyzvannye stimuliatsiei pul'py zuba otvety dental'nykh zon kory golovnogo mozga krolikov.

The primary responses of the dental areas of the brain cortex in anesthetized rabbits were recorded to demonstrate that application of the alpha-adrenomimetic noradrenaline and beta-adrenolytic propranolol to the cortex suppressed, while application of the beta-adrenomimetic isadrin and alpha-adrenolytic phentolamine potentiated the electrical responses to nociceptive stimulation of the dental pulp. It was found that phentolamine exerted dissimilar effects.

[Effect of cholinergic substances on nociceptive evoked responses in specific thalamic nuclei]. / Vliianie kholinergicheskikh veshchestv na notsitseptivnye vyzvannye otvety v spetsificheskikh iadrakh talamusa.

The effect of the M-cholinomimetic arecoline and M-cholinolytic metamizil, n-cholinomimetic lobelin and n-cholinolytic -506 (beta-ethylenespasmolytin) on the formation of nociceptive responses induced by dental pulp stimulation was studied by means of microinjections into the rabbit thalamus preparations VPM and VPL. Arecoline and -506 decreased while metamizil and lobelin increased the amplitude of the primary responses. No changes in the latent periods were noted. It is concluded that the activation of the M-cholinergic structures of specific nuclei of the thalamus reduces the nociceptive responses. The activation of the N-cholinergic structures potentiates the nociceptive responses in specific relays.

[Effect of GABA, sodium glutamate and glycine on evoked potentials in the dental zones of the cerebral cortex]. / Vliianie GAMK, glutamata natriia i glitsina na vyzvannye potentsialy v dental'nykh zonakh kory golovnogo mozga.

Intraventricular administration of gamma-aminobutyric acid (GABA) and glycine decreased, whereas sodium glutamate increased the amplitude of primary responses of dental zones of the somatosensory cortex, which arose during electric stimulation of the pulp of the rabbit upper incisors. No changes in the latent periods were recorded.

[Effect of serotoninergic substances on the brain potentials evoked by stimulation of the dental pulp]. / Vliianie serotoninergicheskikh veshchestv na potentsialy mozga, vyzvannye razdrazheniem pul'py zuba.

Serotonin like M-serotonin blocking agent morphine and D-serotonin blocking agent diethalamide of lysergic acid is shown by the method of intravenous microinjections to lower and T-serotonin blocking agent tipindol--to increase the amplitude of primary responses from the dental areas of the brain cortex arising in stimulation of the dental pulp. It is suggested that the seroninergic system of the brain can through the intermediary of the M- and D-serotonin-receptors raise the activity of adrenergic and lower the activity of M-cholinergic structures participating in the formation of the functional system of pain reactions. An opposite effect can be accomplished through the medium of the T-serotonin receptors.