[Prophylaxis of wound infection in patients with head and neck tumors with an account of the pathogen taxonomic pattern].

The most important problem of onkology, i. e. antibiotic prophylaxis and treatment of postoperative infectious complications is touched upon in the paper.

[Experimental study of osseointegration of zirconium and titanium dental implants].

In an experiment performed on pigs, methods of light and scanning electron microscopy were used to study the interaction of zirconium and titanium dental implants with bone 6 months following their insertion. Distinct features of integration of both implant types with bone structures were detected. Sites of direct contact of bone structures with metal were found to undergo constant remodeling according to biochemical and metabolic conditions in each zone of an implant surface.

[Dental enamel hypoplasia in children with combined congenital and hereditary defects in the development of the CNS and the locomotor system (infantile cerebral palsy, spinal cord hernias and myopathies)].

The incidence of hypoplasia in children with congenital and hereditary developmental defects of the central nervous system and the locomotor system is high (44.5 +/- 3.5%), much higher than the incidence of hypoplasia in children without neurological disorders (2.

[Short-latency auditory evoked potentials in infants with otitis media].

Auditory brain-stem potential findings in 154 healthy infants and infants with different forms of middle-ear pathological conditions (306 ears) were indicative of the inflammatory process influence on the parameters of auditory reception in most cases. The changes in the waves' forms and intraoperative morphological findings in the middle ear were correlated. Objective audiometry allows definite determination of the middle ear trouble which is important in diagnosis of latent otitis in infants who are especially prone to this disease.

[Traditional echography and dopplerography in the diagnosis of vascular neoplasms of the maxillofacial area in children].

Twelve patients with hemangiomas of maxillofacial soft tissues aged 9 months to 15 years were examined by B-mode echography and color doppler imaging of the bloodstream. Combination of these two methods helps confirm the presence of a vascular neoformation, assess its dissemination, volume, and syntopy, specify the morphological variant of its structure, evaluate bloodstream velocity in various parts of the neoplasm. The notion of bloodstream intensity is introduced for the first time, reflecting the number of actively functioning vessels per unit of tumor volume.

[The dynamics of individual preference in the probability and value of reinforcement in the development of experimental neurosis].

After single and repeated negative emotiogenic (neuroticizing) influences in phlegmatics and cholerics in a situation with different probability and value of reinforcement a change of behaviour strategy takes place--from the preference of a reinforcement of higher probability but worse quality to that of low probability but valuable. Strategy of behaviour of sanguinics and melancholics remains unchanged with the preference of a reinforcement of low probability but better quality. The greatest sensibility to negative emotiogenic influence (a conflict situation) was established in phlegmatics and the lowest sensibility--in sanguinics.

[A neuropharmacological analysis of individual preference for the probability and quality of reinforcement].

Under the influence of diazepam in doses of 0.2-2.0 mg/kg in a situation of different probability and value of a reinforcement the dogs--sanguinics and melancholics change their strategy of behavior, from the preference at norm of a reinforcement of the low probability but the better quality to that of the high probability but the worse quality.

[The relation of the typological classification of dogs to their behavioral characteristics in variations between the probability and the value of reinforcement].

In studying of dogs behaviour in coordinates system "Requirements and probability of their satisfaction" it has been established that selection of behaviour strategy is closely connected with individual typological properties of animals. In experiments with equally-probable alimentary reinforcement a direct correlation was found between the strength parameter of the nervous system and the strategy of dogs behaviour. Animals of strong types manifested the character of reaction which consisted in determination and goal-directedness, while the animals of the weak type manifested other character, having features of uncertainty, indefinition, hesitations.

[An experimental validation of the use of various types of allografts for the replacement of mandibular defects].

The intensity of restructuring of various types of bone transplants and reaction of the adjacent tissues of the femoral distal epiphysis to these transplants was studied in rat experiments. The most manifest bone-inducing properties were detected in demineralized allobone, the least so in formalin-treated one; lyophilized and frozen transplants occupy an intermediate position between these two. These data are recommended to be borne in mind when replacing mandibular defects.

[Changes in the correlations of the different indices of the entire behavior of dogs under the influence of seduxen].

During chronic use of seduxen various changes of correlation connections between different parameters of general behaviour are revealed in dogs. The character and degree of expressiveness of these changes depend on the drug dose and typological characteristics of animals. The most general and significant manifestation of favourable effect of the drug action on animals behaviour is an increase of the number of "strong" correlation connections (correlation coefficient is more than 0.

[Neuromediator shifts in the peripheral blood of dogs resulting from negative emotiogenic exposure].

The analysis of negative emotiogenic influence in dogs carried out according to dynamics of levels of acetylcholine and catecholamine content in peripheral blood and concomitant changes of the higher nervous activity, allows to conclude about the participation of both cholinergic and catecholaminergic neurotransmitter systems in reactions to this influence with a relative predominance of the first one. In animals with decreased reactivity and with compensatory abilities of the cholinergic system, the same influence leads to enhancement of the specific significance of the reaction of the catecholaminergic system, and especially of its transmitter, noradrenergic component.

[Clinical and experimental studies of the role of neuromediator systems in the pathogenesis of neurosis and neurosis-like states].

Clinical studies revealed a significant increase in the peripheral blood levels of noradrenaline in patients with different forms of neurosis and neurosis-like states as compared to control subjects as well as heterogeneous or unidirectional but differently pronounced changes in blood levels of acetylcholine and adrenaline. Comparison of the clinical findings with the results of dynamic assays for peripheral levels of acetylcholine and catecholamine in dogs exposed to special psychogenic and physiogenic impacts has helped to form an understanding about some common mechanisms of the formation of neuroses and neurosis-like states. The authors emphasize the consistency of neuromediator shifts in the blood of patients and the possibility of using this parameter for the differential diagnosis of various forms of neurotic disturbances at the initial stage of the disease.

[Temporal characteristics of sleep in the dog].

Main time characteristics of sleep were studied in 9 adult dogs in experiments with 24-hr polygraphic recordings. The all-day sleep quantity (35%), circadian distribution of sleep with the maximum between 24 and 9 hours, more rapid rise of delta-sleep (DS) in the second half of day and of REM sleep in the first hours of night -- all these data suggest that the dog sleep schedule is under considerable influence of ecological factors related to time organization of activity and sleep in humans. A relatively high amount of drowsiness in dog's sleep (nearly 25%) is comparable with DS representation.