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I Ia Poiurovskaia

Publications and source records attributed to I Ia Poiurovskaia.

At least 19 recordsLinked to original sources
PubMed2006

[Characteristics of domestically produced siloxane elastomer for making elastic gingival prosthetic device].

Gingival prosthetics effectively eliminates esthetic and phonetic disturbances in cases of pronounced gingival recession. Technology for making elastic gingival prosthetic devices of domestically produced siloxane elastomer composition with microwave siloxane vulcanization is described as well as the technique for making combined gingival prosthetics of siloxane composition and colorless plastic.

Dental Prosthesis Design↗
PubMed2004

[Laboratory evaluation of the efficiency of dental root channel filling].

Adhesive strength of gutta-percha stems connection to the root channel walls was evaluated. The pressure on dental root channel walls during tooth filling by the lateral condensation method was evaluated. The study was carried out on an Instron device by the pulling out method. The study showed that for stems Nos. 15-30 the retention strength in the root channel was about 2-fold higher than for stems Nos. 35-45. The results indicate that the value of stem pressure on root channel walls during tooth filling by the lateral condensation method can be considered critical with regard to the strength of the dental root proper.

Adhesiveness↗
PubMed2003

[Characteristics of wearing resistance of materials for repair of masticatory teeth].

Wear resistance parameters were evaluated for 5 materials used for masticatory teeth filling. The study was carried out on an Uism-1 device for evaluation of abrasion resistance of dental materials by the friction method during circular movement of a premolar (removed for orthodontic indications) along the surface of reference material. Similar abrasion resistance in the material-tooth pair was detected for 4 materials: Herculite XRV (Kerr-Sybron), Unirest (Stomadent), Dyract AP (Dentsply/De Trey), and Tytin amalgams (S.S. White); the parameters of wear differed. The highest wear of material paralleled by high tooth abrasion were detected for Filtek P-60 (3M/Dental) material.

Bicuspid↗
PubMed2002

[Comparative in vitro evaluation of color and color stability of composite and ceramic ionomer materials for esthetic repair of teeth].

Comparative colorimetric evaluation of shades and translucency of different samples, fabricated from Filtec Z-250, Unirest, Dyract AP and Vitremer, shows, that differences in their compositions and industrial technologies result to great differences between the shades of the same number of Vita Shade Guide. The less color stability after long term action by foods media to the samples was found for the glass ionomer cement. The best color stability was found for composites, partially, for Unirest. All of these, let us conclude, that the main changes, not only in shades, but in translucency of materials, as a result the action of model media, take place at the early periods (the first month). Usually, the most main changes in restorative materials take place in this period of beginning and connect with the end of setting processes and achieving the balances between water absorption and solubility.

Color↗
PubMed2002

[Special basic material for microwave polymerization of AKR-MV].

Some physical and mechanical properties of the new acrylic material ACR-MW for microwave polymerization, the base material Etacryl-02 ("Stoma", Ukraine) and their analogue Acron MC (GC Lab Technologies Inc., Japan). The findings suggest that the new special denture base material ACR-MW for rapid microwave polymerization (3 min at 100%) possesses the highest bending strength with lower water absorption and solubility. The properties of ACR-MW meet the requirements of ISO 1567.

Acrylic Resins↗
PubMed2001

[Adhesive strength between liner and filling in treatment of root canal: in vitro study].

Adhesive strength of combination of several liner and filling materials used for filling dental root channels was studied and the marginal permeability of root channel from the side of the crown was evaluated after filling with several pairs of pad and filling materials. Filling of root channels with gutta percha pins with hermetics did not deteriorate the strength of adhesion of BaseLine pad to the bottom of the cavity, while filling with Forfenane decreased the adhesion of this pad material 3-fold. Use of Belocor polycarboxylate cement for pad essentially deteriorated the adhesive strength of the pad irrespective of the filling material.

Adhesiveness↗
PubMed1998

[The comparative characteristics of chemically and light-hardened composite materials 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.

Adhesiveness↗
PubMed1998

[Microwave technology for fabricating the bases of plate dentures].

Polymerization of basic acrylic heat-hardened plastic under the effect of UHF exposure is studied. Specimens and standard bases of dentures from Russian acrylic plastic widely used in orthodontics were used in experiment. Plastics polymerized in UHF field and in water bath were compared. Experiments helped develop a method for making removable dentures using microwaves.

Acrylic Resins↗
PubMed1997

[A light-hardened polymeric material for metal-plastic whole-cast fixed dentures].

Self-hardening material for metal plastic permanent dentures, has been developed by the Central Research Institute of Dentistry for the first time in Russia. Its physicomechanical properties are described and the results of toxicological trials are presented. The new material is superior in wear resistance to foreign analogs Kulzer Dentacolor and ESPE Visio-Gem. Toxicological studies demonstrated the biological inertness of the material during long contact with the internal media of human organism and the absence of toxic, sensitizing, and mutagenic action.

Acrylic Resins↗
PubMedDate not supplied

[Microwave technology in dental and eye prosthesis].

The paper outlines the specific features of using microwave technologies in dental and eye prostheses designed in Russia in 1992-1998. Thermal, microwave, and combined polymerizations of plastic materials used in prosthesis are compared. A Denta microwave unit is presented, which realizes a combined microwave technology.

Dental Prosthesis↗
PubMedDate not supplied

[The possibilities for the objective assessment of the color of dental materials on the Quartz-4-type spectrophotometer].

The authors analyzed the possibility of using the Quartz 4 type acoustic-optic spectrophotometer to identify the shades of stomatologic materials. Analysis of spectral aperture coefficient curves was carried out for 10 shades of plastics used to make permanent dentures Sinma-M. The authors came to the conclusion on the usefulness of such method of identification of the stomatologic material shades and even of the intermediate gradations of these shades. Using this method, it is possible to control the material surface color homogeneity.

Color↗