[The use of intraosseous appliances considering the anatomical features of the hard palate].

Objective: The aim of the study. To improve the effectiveness of patients' treatment with narrow upper jaw by improving the stability of intraosseous devices.

Materials And Methods: 40 patients with the narrow upper jaw, from 12 to 40 years old, were treated.

[Manufacturing of zirconia restorations by means of additive fabrication. Part 2].

Additive fabrication (AF) or layer-by-layer synthesis technologies is one of the most dynamically developing areas of digital production. Modern additive technologies can be used to fabricate zirconia-based restorations. The second part of this article will present the fabrication of zirconia restorations using additive technologies such as selective laser sintering (SLS), selective laser melting (SLM), binder jetting (BJ), robocasting (fusion deposition modeling, FDM), as well as the advantages and disadvantages of the mentioned technologies.

[Manufacturing of zirconia restorations by means of additive fabrication. Part I].

Additive fabrication or layer-by-layer synthesis technologies is one of the most dynamically developing areas of digital production. Modern additive technologies can be used to fabricate zirconia-based restorations. The first part of this article will present the fabrication of zirconia restorations using additive technologies such as stereolithography, digital light processing, selective laser sintering, selective laser melting and inkjet printing, as well as the advantages and disadvantages of the mentioned technologies.

[Comparative evaluation of traditional and speed sintering of dental ceramics based on zirconium dioxide].

This study analyzed the traditional and high-speed firing of dental ceramics based on zirconia. The types of furnaces for sintering zirconia, the basic principles of traditional, high-speed and super-speed firing, as well as the effect of the sintering protocol on the structure, physical, mechanical, optical properties, wear and marginal fit of zirconia were evaluated. The analysis showed that it`s necessary to develop a special optimal sintering technique using particular protocols in specific types of furnaces for each dental ceramic material based on zirconia, taking into account the composition and structure of the ceramics.

[Adhesion of dental cements to zirconia restorations. Part 2].

The information about methods of surface preparation for dentures made from ceramic based on zirconium dioxide for better adhesive fixation is presented in the first part of this article Micromechanical methods of preparation for cementation of the surface of a zirconia dental prosthesis are discussed in the first part of this article The second part of the article provides an overview of scientific research on chemical methods for preparing a surface made of zirconia and the problem of the bond strength of polymer cement with a prepared surface made of zirconia.

[Reinforcement of photosensitive material for bases of orthodontic appliances].

Objective: The objective of the study was to improve the strength properties polymer by modifying its basis with various materials.

Material And Methods: A polymer in the form of a pink-colored plasticine mass with veins was studied, a quartz mesh «Quartz splint mesh» manufactured by RTD (France) and two metal gold-plated wire mesh (0.1 mm and 0.

[Fluorescence of zirconia-based dental ceramic materials].

The review contains information about the fluorescent properties of natural teeth, fluorescent additives, fluorescent liquids for staining zirconium dioxide, fluorescent powders, pastes, glazes, and cements for zirconia, methods for measuring fluorescence. Factors affecting the fluorescent properties of ceramics are also reported.

[The experimental study of a Russian orthodontic mini-screw].

Background: The aim of this research is the experimental study measuring stability of the orthodontic miniscrews «Turbo» designed in Russia in comparison with its foreign analogues, namely, «Vector Tas» (USA) and «BioRay» (Taiwan).

Material And Methods: Four self-drilling orthodontic miniscrews of each manufacturer, i.e.

[Adhesion of dental cements to zirconia restorations (part 1)].

The analysis of modern scientific data on traditional and adhesive fixation of zirconia restorations, adhesion of various cements to zirconium dioxide, methods of surface preparation of ceramic restorations is presented. Micromechanical methods of preparation for cementation of the surface of a zirconia dental prosthesis are discussed in Part 1.

[Translucent zirconia ceramics for fabrication monolithic restorations: review. Part 2].

Translucent zirconia ceramics for fabrication monolithic restorations is a ceramic material of latest generation. The objective of this literature review is discussing the ways to increase the transparency of zirconia, novel technologies of its manufacturing (part 1) and laboratory procedures for fabrication translucent zirconia restorations, factors affecting the transparency, optical and physico-mechanical properties of the material, as well as indications for its use (part 2).

[Translucent zirconia ceramics for fabrication of monolithic restorations: review. Part 1].

Translucent zirconia ceramics for fabrication monolithic restorations is a ceramic material of latest generation. The objective of this literature review is discussing the ways to increase the transparency of zirconia, novel technologies of its manufacturing (part 1) and laboratory procedures for fabrication translucent zirconia restorations, factors affecting the transparency, optical and physico-mechanical properties of the material, as well as indications for its use (part 2).

[Comparative clinical evaluation of the prosthetic treatment quality of molars restored by chairside manufactured CAD/CAM crowns].

Aim: A comparative clinical evaluation of the results of prosthetic treatment with chairside CAD/CAM crowns for molars made from hybrid ceramics VITA Enamic, blocks of feldspatic ceramics VITABlocs Mark II, blocks of leucite glass IPS Empress CAD.

Material And Methods: The study involved 30 patients aged from 19 to 60 years old with defects in hard tissues of molars. For clinical evaluation we used 'Clinical criteria for evaluation of direct and indirect restorations' developed by FDI in 2007, which included the assessment of several aesthetic, functional and biological parameters.

The Micromorphological Research of the Internal Structure of Chairside CAD/CAM Materials by the Method of Scanning Impulse Acoustic Microscopy (SIAM).

Aim: The aim of the present work was to compare the elastic properties and internal structure of 4 different CAD/CAM chairside materials, by the method of Scanning Impulse Acoustic Microscopy (SIAM).

Methods: Four chairside CAD/CAM materials with different structures from hybrid ceramic (VITA Enamic, VITA Zahnfabrik), feldspatic ceramic (VITABlocs Mark II, VITA Zahnfabrik), leucite glass-ceramic (IPS Empress CAD, Ivoclar Vivadent) and PMMA (Telio CAD, Ivoclar Vivadent) were examined by Scanning Impulse Acoustic Microscope (SIAM).

Results: The results of micromorphological research of CAD/CAM chairside materials using SIAM method showed differences between the internal structures of these materials.

[Elastic properties and porosity of dental blocks made from non-metal materials used for chairside CAD/CAM crowns].

Elastic properties and internal structure of glass-ceramic, feldspatic ceramic, PMMA and hybrid blocks for chairside CAD/CAM dental crowns were assessed by pulsed acoustic microscopy. Elastic modulus of hybrid ceramic was 1.5 times inferior to feldspatic ceramic and glass-ceramic but almost 10 times higher than those of polymer samples.

[Modern home-manufactured materials for non-metal dental restorations].

Metal-free dentures are currently made of 3 types of materials: polymers, composites and ceramics. The present report is devoted to the current status of the production and use of domestic structural materials for metal-free dentures.

[Technological features of metal-ceramic prosthesis frameworks manufactured from domestic alloys of precious and base metals].

The aim of the study was to examine changes in physical and mechanical properties of dental alloys depending of the initial composition at re-casting. Russianc precious alloys: Plagodent (AuPtPd) and Palladent (PdAu) and base alloys: Vitiriy-N (NiCrMo) and Vitiriy-C (CoCrMo) were used as study samples, which were divided in three groups: a primary casting from the granules; 50% of re-casting; 100% of re-casting. We investigated the yield strength in bending, coefficient of thermal expansion and hardness.

[STUDY OF COLONIZATION PROCESSES AND PERSISTENCE OF MICROORGANISMS IN ARTIFICIAL MATERIALS FOR MEDICAL USE].

Aim: Study processes of microbial colonization and persistence of microorganisms in polymer materials for medical use.

Materials And Methods: Samples (1 x 1 cm plates) of polymer plastics for production of removable dental prosthesis based on polyurethane and acryl were used, that were incubated with clinical isolates of Pseudomonas aeuruginosa, Staphylococcus aureus in Luria-Bertani broth nutrient media for 24, 48 hours and 7, 14 days and for 1, 5 and 3 months at a temperature of 37 degrees C. Dynamics of interaction process of microorganisms with polymer materials were studied using scanning electron microscope Quanta 200 3D (FEI Company, USA).

[Quantitative evaluation of the quality of external beam radiotherapy planning of patients with cervical cancer].

The evaluation of the quality of external radiotherapy plans in patients with cervical cancer was performed. There was analyzed homogeneity index in the target volume (PTV), conformity index and others for 53 patients. Homogeneity and conformity indexes within the tolerances were achievable in the clinic with the implementation of technology 3D CRT, IMRT and Rapid Arc.

[Quantitative estimation of tumor size and density by computed tomography images during adaptive radiation therapy].

The purpose of this study is to demonstrate clinically available quantitative method (special program) of estimation dynamics of tumor size and physical density (g/cm3) during adaptive radiation therapy of cancer patients for any occasion of visualization of tumor borders including the cases when tumor border is not clearly visualized. It has been showed quantitative information content of this method that could be used in clinical practice.

[Optimization of implant and teeth retained restorations by two-step dental implantation].

Strength properties of provisional resin implant-retained restorations were assessed in vitro. The results were used to justify the use of combined temporary and two-step dental implantation.

[Experience in working out of tools of quality management of maxillofacial prosthetics].

Expericnce of working out of tools of quality management of maxillofacial prosthetics which can be applied in clinical practice of maxillofacial orthopedy is presented. The fragment of the algorithm of maxillofacial prosthetics developed by authors is presented.