[Comparative study of injuring action of the preparations used for chemical-mechanic removal of carious dentine].

The destruction of human serum albumin was studied under the influence of the preparations used for chemical-mechanic removal of carious dentine (GK-101 and Caricleans, gel #2) and model systems containing sodium hypochlorite and amino compounds. Control contained hydroxide and sodium chloride but not hypochlorite. The degree of albumin destruction was determined by the amount of low molecular weight fragments precipitated by phosphotungstic acid but not by trichloracetic acid. From the results of the study the conclusion was made that in order to reduce the injuring action of hypochlorite upon dental tissues and soft tissues of oral cavity it is more preferable to use systems containing the addition of neutral and basic amino compounds.

[Biological evaluation of means for chemomechanical removal of carious dentine].

Biological evaluation of the 1st domestically developed and produced preparation for chemomechanical removal of carious dentine Caricleans (firm "VladMiVa", Belgorod) was performed in the CRIS with the use of express techniques of the hemolytic activity (HA) and cytotoxic effect (CTE). It was established that according to HA data both gels of the Caricleans preparation were nontoxic. CTE of 2 gels was also determined on 2 cells lines - LECH (lung embryon cell human) and HeLa; higher sensitivity was received on HeLa cells, the toxic effect of gel #2 of the Caricleans preparation was higher. The received results allowed the authors come to the conclusion that taking into account high sensitivity, high specificity and high cost of the CTE-test not to recommend its use for evaluation of the preparations for short-term action in stomatology.

[The comparative characteristics of chemically and light-hardened composite materials in vitro]. / Sravnitel'naia khrakteristika kompozitnykh materialov khimicheskogo i svetovogo otverzhdeniia in vitro.

The strength and color stability of various composites of photo- and chemical consolidation is assessed by laboratory methods. The class of a material is the most essential factor affecting the above characteristics. The macrofilled and hybrid materials showed the best adhesive and bending strength. The method of consolidation does not notably affect the studied characteristics.

[A new direction in the development of Russian silver amalgams. I. The physical research]. / Novoe napravlenie v razrabotke otechestvennykh serebrianykh amal'gam. I. Fizicheskie issledovaniia.

A new in principle, ecologically safe and low-waste technology for preparation of an alloy and a formula of several silver alloys containing different levels of silver (OCTA-43, 70 and 80) have been developed. The absence of a alpha-2 phase in amalgams prepared from these alloys is their principally new feature. Physical properties of the new alloys were studied and compared with the known Russian and foreign analogs. Amalgam prepared from CCTA-43 alloy is characterized by optimal characteristics. By their physical characteristics the new compositions are superior to traditional and silver alloys manufactured in Russia at present, and amalgam prepared from OCTA-43 alloy is not inferior to the best foreign analogs.

[The working conditions of medical personnel handling the SMTA brand copper amalgam]. / Usloviia truda meditsinskogo personala pri rabote s mednoi amal'gamoi marki SMTA.

To assess the working conditions of medical staff the authors compared mercury vapor concentrations released during manipulations with various copper amalgams, TMAC-01 tableted copper amalgam manufactured by Nikitiv Mercury Plant, its foreign copper analog manufactured be "Becht" (Germany), and a new CMTA capsulated copper amalgam. Use of CMTA copper amalgam was found not hazardous for medical staff provided sanitary and hygienic regulations were adhered to. Moreover, mercury vapor concentrations released during work allow its use in rooms without ventilation cabinets, whereas tableted copper amalgams TMAC-01 and Becht may be used only in dentistry rooms equipped with such cabinets.

[Assessment of the biological properties of composite filling materials: determination of indices of their hemolytic activity and cytotoxicity]. / Otsenka biologicheskikh svoistv kompozitsionnykh plombirovochnykh materialov: opredelenie pokazatelei gemoliticheskoi aktivnosti i tsitotoksichnosti.

Rapid methods for determining the hemolytic activity in 10% suspension of human red cells and the cytotoxicity in human embryo fibroblast and HeLa cell cultures were used to assess the biological characteristics of some experimental composite filling materials and their foreign analogs. The results permit assessing the impact on the biological characteristics of individual components, of the entire composition, of the purity of the initial ingredients and their polymerization ability, this being valuable for the development of materials with the optimal characteristics.