[Ultrasonic treatment of the gingiva (experimental research)]. / Ul'trazvukovaia obrabotka desny (éksperimental'noe issledovanie).

Gingival disease was induced in 18 dogs aged 2-3 years, b.m. 4-6 kg. Gingival grooves of experimental animals (n = 12) were exposed to ultrasound (US) through furacilin solution (1:5000), the gap between needle waveguide and tissues being 1-2 mm. In 6 reference animals the tissues were treated by the routine procedure. Time course of reparative processes was followed up on days 1, 7, 14, 30, and 60 after US session. Experiments have demonstrated the efficacy of low-frequency US in gingival diseases as against the routine treatment: reparative processes normalized on the 7th day after exposure to US.

[Morphofunctional aspects of the experimental effect of hyperbaric oxygenation on the myocardium of the healthy organism]. / Morfofunktsional'nye aspekty vliianiia giperbaricheskoi oksigenatsii na miokard zdorovogo organizma v éksperimente.

Changes in the myocardium arter numerous treatments with hyperbaric oxygenation (HBO) (PO2 3 technical atmospheres, time of saturation--45 min) were studied by morphological, histochemical and enzymohistochemical methods in 50 rabbits. Three stages were found to occur in the development of these changes: 1) functional-morphological changes (1--3 seanses of HBO), 2) early morphological changes (4--5 seanses), 3) marked morphological lesions (6--8 seanses). The first three treatments produce reversible changes on the part of metabolic processes (a reduction in the content of glycogen and changes in the activity of oxidoreductases: succinate-, malate- and lactate dehydrogenase). Morphological signs of oxygen toxicity in the form of disorders in hemodynamics and microcirculation, and dystrophy of cardiomyocytes appear after 4 seanses of HBO and increase with further treatment. The experimental data permit to recommend short HBO courses (1--3 seanses) for therapeutic application.