Publications by authors named "Portnoĭ V"

The possibility of making titanium tooth crowns by superplastic molding has been investigated. Optimal materials and technological parameters have been selected: Siolit molding mass, fixing composition for facing with plastic (Targit link + opaquer), method for tooth preparation under such crowns (step 135, stump height to diameter ratio 1.5:1, smooth transfer from occlusion surface to others, and disposition of stamps in the press form.

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Biomechanical model "tooth-jaw" in considered. This biomechanical model takes into account local nonhomogeneous mechanical constructions tooth-jaw, its special geometry, physical properties of firm tissues of tooth, periodontium and jaw. Using mathematical methods, determination of supporting jaw tissues depending by computer tomograms was grounded.

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The effect of vertical component of geomagnetic field on ciliate apparatus of ependymal cells in newborn rats in culture has been studied. It has been shown that hypo- and hypermagnetic fields retard the motor activity of ciliary apparatus up to full stoppage with cell swelling.

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The interrelation between the energy and nitrogenous metabolism of the myocardium during cardioplegia has been studied in patients with congenital valvular heart disease (tetralogy of Fallot--12 patients, ventricular septal defect--5 patients). Whole body hypothermia with repeated heart reperfusion with cold cardioplegic blood perfusate was used for the protection of the myocardium. However, ATP level of the myocardium of some patients decreased by 20% and more of the baseline.

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