Finite element analysis of V-shaped tooth defects filled with universal nanohybrid composite using incremental technique.

The aim of the present paper is to study the stresses and strains in fillings of V-shaped tooth defects made of universal photo-cured nanohybrid composite (UPC) using incremental technique. Numerical modeling with FEA and microleakage test are performed. Inhomogeneous distribution of the equivalent Von Mises stresses after polymerization of the two UPC layers is found, as the maximal value after polymerization of the first layer is 1.

[Beta 2-microglobulin in chronic exacerbated pyelonephritis].

The serum and urine beta 2-microglobulin levels were determined in patients with chronic recurrent pyelonephritis and in healthy controls. The urine beta 2-microglobulin level was considerably increased in the patients with chronic recurrent pyelonephritis which is linked with the activity of the disease.

[Effect of the type of nutrition on the dynamics and stages of morphological changes in the liver during experimental N-nitrosodiethylamine carcinogenesis].

The time course of the development of morphological changes was studied in the liver of rats given intraperitoneal injections of nitrosodiethylamine (NDEA) in a dose of 130 mg/kg, weekly, during 9 weeks, in the presence of full value hypocalorific (70% calorific value of the ration received by the control group), and hypercalorific (130% calorific value) nutrition. Four stages were distinguished in the development of the pathologic process under a chronic action of NDEA: I-alternative, II-alternative-proliferative, III--proliferative-tumorigenic, and IV--the stage of malignant growth. No matter what character of nutrition was, continuous NDEA administration induced the development of neoplasms in the liver 120 days after the commencement of the injections.

[Cell subpopulations of pyelonephritis patients studied using monoclonal antibodies].

The paper is devoted to a very important problem of immune mechanisms participation in the origination and maintenance of the inflammatory processes in kidneys and urinary ducts. The results from the study of lymphocyte subpopulations, making use of monoclonal antibodies in patients with clinical-laboratory data about chronic pyelonephritis without chronic renal insufficiency, as compared with healthy controls, are reported. Significantly reduced total T-lymphocyte (OKT1+) were established as well as T-helpers lymphocytes (OKT4+) and increased number of monocytes (OKM5+).

[Drug sensitivity of urinary microflora and the effect of treatment in exacerbated chronic pyelonephritis].

A total of 226 patients with exacerbated chronic pyelonephritis were studied and the effect of 10-day antibacterial course--followed up. In 178 cases the treatment was consistent with the drug susceptibility of urine microflora and in 48, it was carried out in the absence of such susceptibility. The susceptible strains were affected in a considerably higher percentage (64.

[Potentials for studying aldosterone by using the Adrenoprobe (a preliminary report)].

A preliminary communication is presented about the results, obtained from aldosterone determination via the Adrenoprobe. The method is stressed to deserve attention since it is rapid, easy to perform and the results are obtained immediately after the investigation. On the other hand, the discrepancies between the results in some patients, obtained radioimmunologically and via the Adrenoprobe, revealed that further parallel investigations would be necessary (in order to obtain more data on the accuracy of aldosterone determination via the Adrenoprobe.

[Morphologic and morphometric studies of the liver of the white rat during inadequate feeding and aflatoxin poisoning].

The authors carried out morphological and morphometric studies of the liver of rats under malnutrition and chronic aflatoxin intoxication for 2 and 7 months. Malnourished animals demonstrated atrophic alterations. Animals exposed to aflatoxin B1 manifested severe dystrophic and necrobiotic alterations which did not depend on the nutrition regimen.

[Gamma-chamber control of patients with Fraley syndrome].

Forty patients with Fraley syndrome were examined via "radioisotopic method for sector investigation of renal function" and the patients were grouped into 5 groups according to the results obtained. It was stressed that via the method used in patients with Fraley syndrome, an effective control could be carried out of the urodynamic disturbances and their effect on the vitality of the respective nephron population; the information obtained objectivizes the pathological deviations hence modelling the therapeutic behaviour.