Igor Lebedenko

Igor Lebedenko
Peoples' Friendship University of Russia | rudn · Department of prosthetic Dentistry

Doctor of Medicine

About

65
Publications
1,635
Reads
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73
Citations
Citations since 2016
24 Research Items
44 Citations
201620172018201920202021202202468
201620172018201920202021202202468
201620172018201920202021202202468
201620172018201920202021202202468
Introduction
Igor Lebedenko currently works at the Department of prosthetic Dentistry, Peoples' Friendship University of Russia. Igor does research in Oral and Maxillofacial Surgery, Dental Surgery and Restorative Dentistry and Endodontics. Their most recent publication is 'Stability of Ceramic-Ceramic Restorations for Orthopedic Dentistry'.

Publications

Publications (65)
Article
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 zir...
Article
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.
Article
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.
Article
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...
Article
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...
Article
Wind instrumentalist are prone to a number of occupational hazards that can lead to occupational diseases. Zaza defined these dis- eases as playing-related musculoskeletal disorders (PRMD). Such occupational diseases are devastating for musicians in terms of psy- chological health and financial state. According to various epidemiological studies, 6...
Article
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, facto...
Article
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, facto...
Article
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 h...
Article
The article shows the results of physical and mechanical tests of samples of the alloy palladent UNI based on palladium for metal-ceramic dentures. The values of these results were used for mathematical modeling by finite element method of metal-ceramic prosthesis frames. Determined the minimum allowable size of the connection supporting crowns and...
Article
Full-text available
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 M...
Article
The article shows the creation of a new Russian base alloy of palladium for metal-ceramic dental prostheses “Palladini UNI” puteam comprehensive analysis of the influence of alloying elements on the phase structure of the palladium alloys, physical and mechanical properties and coefficient of thermal linear expansion.
Article
Full-text available
The article shows the creation of the new Russian alloy based on palladium for metal-ceramic dental prostheses "Palladini UNI puteam comprehensive analysis of the influence of alloying elements on the phase structure of the palladium alloys, physical and mechanical properties and coefficient of thermal linear expansion.
Article
Full-text available
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. We found th...
Article
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...
Article
Full-text available
Impulse acoustic microscopy technique has been applied for investigation of features of ceramic-ceramic contact zone. At the interface the method allows to identified and localized detachment and extended partial contact area (kissing contact), shown distribution of the thickness of the interlayer and its homogeneity.
Article
We carried out the complex clinical-instrumential survey of hard tooth tissues, dentures, tissues and organes of oral cavity of young and middle working aged patients-musicians, who play copper wind instruments. We estimated adaptational-compensational abilities of tissues and organes of oral cavity of young and middle working aged patients-musicia...
Article
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,...
Article
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.
Article
Full-text available
This study shows that submicron/nanoparticles found in bacterial cells (S. aureus) incubated with polyurethane (a mate-rial commonly used for prostheses in odontostomatology) are a consequence of biodestruction. The presence of poly-urethane nanoparticles into bacterial vesicles suggests that the internalization process occurs through endocytosis....
Article
Complex research in which result key problems are revealed is done and the medico-organizational substantiation is given modern principles of rendering of the orthopedic care to the patients with maxillofacial defects.
Article
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.
Article
It is experimentally shown that the developed technique of synthesis of the nanopowders of tetragonal ZrO2, stabilized by Y2O3 and Yb2O3, makes it possible to obtain ceramic materials with high parameters of durability and purity having thin microstructure and adequate sanitary chemical requirements imposed on materials for medical purposes. Key w...
Article
Full-text available
Modern CAD/CAM dental systems that incorporate an intraoral 3D profilometer are considered. The operating principle of the device and its functionality features are described. The first domestically produced intraoral 3D profilometer for a CAD/CAM dental system, which was designed at the All-Russia Research Institute of Optophysical Measurements, i...
Article
The aim of this work is to demonstrate that holographic and speckle interferometry—laser photonics methods are compatible and useful for prosthetic stomatology. These methods allow to study the deformation of the mandible after insertion of mini-implants of various forms, and to give the practical medical recommendations.
Article
In experiment on rabbits by histomorphometric method it was shown that after the use during 4 months of titanium plate with the culture of marrow mesenchymal stromal cells there happened full infill of mandible defect by lamellar bone tissue. In control group (titanium plate with inactivated culture of cells) the defect was replaced by regenerate,...
Article
Different types of dental materials (DM) were studied for their capacity to release histamine in vitro from basophils of whole blood of allergic patients and healthy donors using automated and computerized glass fiber-based leukocyte histamine release test (LHRT). It was shown that some types of DM possessed ability to release histamine from basoph...
Article
The characteristics of the following domestic alloys of noble metals for fixed and removable dentures are given: alloys for metal-ceramic dentures--"Superpal", "Super KM"; alloys for clasp dental prostheses--"Super LB"; solders--"Becadent" and "Super VP"; alloy for castings and metal-composite constructions "Super TZ" and material for electrochemic...
Article
Using developed by us method and instrument Periosensomer the sensor function of the periodontium on the initial stages of masticatory act (test of holding and splitting of food object) in persons with different functional periodontium status was explored. Evaluation of the sensor function of the periodontium and dynamics of the sensor reaction dur...
Article
327 patients with dentures supported by 318 pulpless teeth reinforced by pin constructions were under observation. Main types of complications after pin use were identified. By math simulation the system "covering construction-artificial stump-root pin-root of the tooth" was studied for teeth 11, 13, 15, 16, 41, 43, 45, 46 in two projections--vesti...
Article
There was determined shearing strength of monolit samples of light curing material and samples received by modeling of further layers on surfaces with and without inhibited layer and also tensile strength of layers connected with the help of light curing adhesive. The study was performed on enamel, dentine and cutting edge masses from set of light...
Article
Described in the paper are the study results of the stomatological status of 385 cadavers, in whom the frequency rate of anomalies of separate teeth and of their varieties were evaluated as applicable to the personality identification tasks.
Article
Described in the paper is the possibility of using the specific anomalies of tooth rows in personality identification. The existing classifications of tooth-row anomalies are elucidated; published data on epidemiology of dentomaxillary anomalies in the Russian Federation and on jaw models are analyzed. Digital photos of tooth rows were used. The po...
Article
The quality of life was assessed in 36 patients with painful dysfunction of the temporomandibular joint (TMJ) and 73 patients with TMJ dysfunctions suffering from rheumatoid arthritis. A more significant negative time course of the parameters was observed in patients with rheumatoid arthritis and more positive shifts in patients with isolated TMJ d...
Article
Clinical and instrumental examinations of 120 patients with rheumatoid arthritis (RA) detected a direct correlation between RA stage and severity of dysfunctions and an inverse correlation between the disease stage and angle of the sagittal articular route of the temporomandibular joint.
Article
Adhesion of obligate and facultative anaerobic bacteria, favoring the development of oral inflammatory diseases, including the cariesogenic and periodontogenic bacteria and Candida albicans fungi, isolated from patients with periodontitis, to 13 basic materials used in removable denture making, was studied. The adhesion of all bacteria (Streptococc...
Article
Full-text available
Adhesion of bacteria favoring the development of oral inflammations, including cariesogenic and periodontopathogenic (Actinobacillus actinomycetemcommitans, Streptococcus sanguis, Fusobacterium nucleatum, Staphylococcus warneri) and yeast fungi (Candida albicans), to 13 materials used for making provisional dentures was studied. Adhesion of all the...
Article
A computer study of 99 types of mathematical models of teeth armed with stump pin insertions widely used in dentistry (group 1--anchor pins and group 2--cast pin insertions suggested by the authors). Tooth models differed by shape, size, and properties of the design material. The shape and parameters of stump pin insertion were proven to be more si...
Article
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, smo...
Article
The problem of rational designing of ceramic and metalloceramic dentures is considered. The evaluation of the stress-strain state and the solution of the boundary inhomogeneous elastoplastic problem are used for determining the critical values of the amplitudes of all-ceramic cusps. The effect of the basis of the inhomogeneous structure on the chan...
Article
Problem of rational designing of ceramic and metal-ceramic structures of dentures has been solved. On basis of evaluation of stressed-strained state and solving the non-uniform elastoplastic boundary value problem, critical values of amplitudes of one-piece ceramic cusps have been determined. Influence of base of non-uniform structures on change in...
Article
The SPLEN-K (INZOMA) computing system, based on the mathematical model of a heterogeneous elastic body with linear plastic reinforcement helps estimate the design of coated dentures with due consideration for the individual features of the jaws and teeth, articulation, and occlusion. The open module type of this system permits its modifications and...
Article
Toxic characteristics of Superpal, a dental palladium-based alloy for cermet dentures, were studied in a chronic experiment on 20 rats to which it was subcutaneously implanted. Analysis of histological findings, blood biochemistry, mast cell degranulation test, summarization of subthreshold pulses, and the micronucleus test showed that Superpal all...
Article
Positive follow-up results achieved in patients with metal-glass ceramic dentures coated with Simet permit the authors to recommend glass ceramic Simet for wide clinical introduction. In reconstructive dental prosthetics with metal glass ceramic and cermet materials the dentures should be modelled in the articulator. Preventive examinations are rec...
Article
Osteogenic morphological results were assessed at the place of contact of an implant biosital with the lower alveolar jaw-bone in 10 rabbits. Primary mineralization was characterized by the presence of active forming cells and calcified calcospherite structures. Intensive primary mineralization suggests biosital to be a stimulus for ossification (b...
Article
Good results of clinical follow-up of patients with cermet dentures coated with cimet (glass ceramic) permit recommending this type of coating for wide practical use. Reconstructive prosthetics with glass ceramic and metal and cermet dentures should involve denture modeling in the articulator and a prophylactic check-up at least once a year with or...

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