scholarly journals CLINICAL CASES INDICATING THE ADVANTAGES OF RESTORATIONS BY CERAMIC DEPOSITS OVER COMPOSITE SEALS

2019 ◽  
Vol 15 (1) ◽  
pp. 104-108
Author(s):  
Виктория Иванова ◽  
Viktoria Ivanova ◽  
Екатерина Макарова ◽  
Ekaterina Makarova ◽  
Максим Никоноров ◽  
...  
Keyword(s):  
Modern Technology ◽  
Practical Significance ◽  
Modern World ◽  
Tooth Structure ◽  
Dental Tissues ◽  
Ceramic Inlays ◽  
All Ceramic ◽  
Hard Dental Tissues ◽  
High Level ◽  
Clinical Cases

Background. In prosthetic dentistry, the replacement of a damaged tooth structure with ceramics has become increasingly common today. The possibility of achieving a high level of aesthetics, durability and cost-effectiveness in the restoration of the coronal part of the teeth with all-ceramic inlays by the method of indirect restoration is one of the topical issues for dentists. Objectives. This article gives an idea of the possibilities of modern technology in orthopedic dentistry. The aim of the work is to identify the quality of the restoration result as compared to fillings in cavities with a degree of destruction according to TOSFI (Tooth Occlusal Surface Failure Index offered by V.Y. Milikevich) -0.3- 0.6 in the teeth of the chewing group. Methods. The article deals with the clinical cases of the replacement of insolvent fillings made of a light-cured composite with cast ceramic microprostheses. For the restoration of the molars, 2 all-ceramic inlays were made on a 5-axis open-type milling system Wieland dental zenotec select hybrid. Results. Based on dental microscopic examination and a comparative analysis of the properties and behavior of the composite fillings and ceramic inlays, one can be sure that the restoration with ceramics is much superior to the composite filling, as it represents a more reliable, durable and aesthetic option for restoring the destroyed tissues of the crowns of chewing teeth. Conclusions. In the modern world, various technologies are being created for prosthetics of hard dental tissues that could create more and more perfect restorations. Looking at the investigated examples of clinical cases and relying on the statements of many authors of works on orthopedic dentistry, we can conclude that tabs are the best alternative to fillings. The practical significance of the work consists in identifying the greater efficacy of treatment for people with significant dental defects due to microprosthetics with ceramic inserts as compared with classical treatment with composite materials.

The role of carbohydrate-protein biopolymers and hyaluronic acid at the resistance formation of hard dental tissues against pathological processes of carious and non-carious genesis

10.12737/7378 ◽  
2014 ◽  
Vol 8 (1) ◽  
pp. 0-0
Author(s):  
Лещева ◽  
E. Leshcheva ◽  
Ипполитов ◽  
I. Ippolitov ◽  
Ипполитов ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Soft Tissues ◽  
Human Tooth ◽  
Cationic Protein ◽  
Thin Sections ◽  
Tooth Structure ◽  
Dental Tissues ◽  
Protein Nature ◽  
Hard Dental Tissues ◽  
Special Studies

At the series of histochemical studies hypothesis of existence of a "cationic protein" in human tooth structure and set of its amino acids components and hyaluronic acid has been checked. Taking into account histogenesis and cytogeny of tooth structure and the earlier results received from the epidermis and multilayer partly keratinous epithelium of the oral mucosa, special studies had been created, based on the original equipment preparation of paraffin sections, and thin sections of the whole teeth and modified histochemical identification technology of carbohydrate-protein biopolymers in hard dental tissues. Histological slides are prepared from extracted for orthodontic indications teeth. Sectioned and examined thin sections of teeth has investigated in transmitted light for issues related to topochemistry of carbohydrate-protein biopolymers and hyaluronic acid concerning the distribution in structures of enamel, dentin, predentin, cellular and acellular cement. Identified carbohydrate-protein biopolymers and substances of protein nature objectively fill inter prismatic enamel areas, dentin tubules and their walls, localized in the cement structure of tooth and its soft tissues forming a physiologi-cal barrier to microorganisms and their metabolic products as in the demineralizing processes as for the mechan-ical interventions during the vital activity and medical interventions.

scholarly journals Evaluation of zirconia bonding to veneering porcelain

2014 ◽  
Vol 60 (02) ◽  
pp. 51-56 ◽  
Author(s):  
Aneta Mijoska ◽  
Mirjana Popovska
Keyword(s):  
Zirconium Dioxide ◽  
Adhesive Bonding ◽  
High Strength ◽  
Dental Tissues ◽  
Dental Crowns ◽  
Standard Procedures ◽  
All Ceramic ◽  
Hard Dental Tissues ◽  
Ceramic Restorations

Zirconium dioxide as core ceramic material for dental crowns and bridges, possess high strength, chemical stability and superior aesthetics after veneering. Veneering ceramic is considered to be the weakest part of all-ceramic restorations. The adhesion between the core and veneering porcelain is based on the manner in which the connection occurs in metal-ceramic structures. Standard procedures for connecting zirconia to hard dental tissues and veneering materials do not achieve the required strength of bonding. The aim of the paper is to investigate different surface treatments of the zirconium dioxide ceramic core and find the best, for achieving highest adhesive bonding values to veneering porcelain. The study was primarily designed to investigate the bonding strength of the veneering porcelain to zirconia with in vitro Macro shear bond strength test. The specimens with different surface treatment of the zirconia were divided in five groups of twelve according to the treatment of zirconium surface and results showed highest bonding values for specimens treated with Rocatec system.

Characteristics of Trace Element Balance in Children with Pollution-Related Dental Diseases

2021 ◽  
pp. 44-48
Author(s):  
NP Setko ◽  
IT Mustafin
Keyword(s):  
Trace Elements ◽  
Anthropogenic Factors ◽  
Environmental Toxicants ◽  
Industrial Chemicals ◽  
Dental Tissues ◽  
Essential Trace Elements ◽  
Dental Diseases ◽  
Hard Dental Tissues ◽  
High Level ◽  
Carious Teeth

Summary. Introduction: The necessity to assess, prevent and correct element-dependent diseases, increase the level of safety, predict and reduce the risk of exposures to industrial contaminants in the development of dental diseases in the child population is an important and promising area of modern hygiene. The objective of our study was to establish concentrations of trace elements in dental tissues of children exposed to various levels of industrial pollution. Materials and methods: We used atomic absorption spectrophotometry to measure 13 trace elements in extracted healthy and carious primary teeth in two groups of children aged 7–11. The first group consisted of 56 children living in the area with a significantly high level of anthropogenic burden (Caveraged total = 1.17 units) and a high prevalence of caries (86.9 %) while the second group consisted of 68 children living in the area with a relatively high level of anthropogenic burden (Caveraged total = 0.68 units) and a mean prevalence of caries (77.1 %) according to WHO criteria. Results: Our findings indicate that accumulation of toxic microelements in hard dental tissues of children in the first group was higher than in children of the second group: concentrations of lead, bismuth, cadmium and strontium were 2.6, 1.8, 2.5, and 1.2 times higher, respectively. We also observed higher accumulation of environmental toxicants in carious teeth compared to healthy ones. Thus, lead, cadmium and bismuth levels in carious teeth were 3.04, 1.2 and 3.13 times higher than in healthy teeth, respectively, while the level of strontium was, on the opposite, 2.5 times lower. Conclusions: The study revealed specific features of the interaction of essential trace elements in children in the form of antagonistic effects between cadmium and zinc, copper and manganese, and synergism in the content of copper, iron, nickel, zinc, and cobalt in healthy teeth, the mechanism of which is based on competition for a bond with a carrier substance and replacement of one element with another. In addition, we established that changes in the microelement balance in the hard tissues of healthy and carious teeth are not unidirectional in nature, thus reflecting complex interactions between the child’s organism and anthropogenic factors. The results proved that accumulation of toxic trace elements in hard dental tissues promotes caries development and causes a sharp decrease in the content of essential trace elements, especially chromium, manganese, iron, and copper. The study showed that hard dental tissues are a depot for lead, cadmium, bismuth, and strontium in children environmentally exposed to high levels of industrial chemicals. Features of developing an imbalance of biotic concentrations of essential elements and accumulating toxic microelements in children with pollution-related tooth pathology were also established.

scholarly journals SECRET MONITORING: A METHOD OF FIGHTING AGAINST TERRORISM

2017 ◽  
pp. 325
Author(s):  
Nedeljko Cvetković
Keyword(s):  
Professional Training ◽  
Modern Technology ◽  
Current Level ◽  
Modern World ◽  
Social Phenomenon ◽  
Mass Destruction ◽  
Security Sector ◽  
Contemporary World ◽  
High Level ◽  
Civilized Society

The danger of terrorism as a social phenomenon is increasingly present and threatens both individual states and the whole of international community. The current level of development in the contemporary world allows terrorists to combine the means of modern technology and those of mass destruction, threatening every civilized society. In the suppression of this plague of the modern world, the use of secret surveillance of people is inevitable as a means of covert collection of data and information about subjects who may be involved in possibly dangerous activities. Yet, the use of secret surveillance of people interferes with the basic human rights and civic freedoms and, therefore, requires the existence of adequate legislation which should be fully observed in the activities of the security sector, as well as a high level of professional training of the security operatives engaged in the process of applying these measures. Although the secret surveillance of people involves many measures and procedures, one of the most commonly used measures is secret monitoring and recording. The significance of this measure is best reflected in the amount of collected evidence.

A New Step in the Study of the History of the Russian Prosecutor’s Office

2019 ◽  
pp. 94-98
Keyword(s):  
Russian Federation ◽  
Russian Empire ◽  
Practical Significance ◽  
History Of ◽  
The Russian Federation ◽  
The Russian Empire ◽  
High Level ◽  
The University

The paper is a review on the textbook by A. V. Yeremin, «The History of the National Prosecutor’s office» and the anthology «The Prosecutor’s Office of the Russian Empire in the Documents of 1722–1917» (authors: V. V. Lavrov, A. V. Eremin, edited by N. M. Ivanov) published at the St. Petersburg Law Institute (branch) of the University of the Prosecutor’s office of the Russian Federation in 2018. The reviewers emphasize the high relevance and high level of research, their theoretical and practical significance. The textbook and the anthology will help the students increase their legal awareness, expand their horizons.

Research on Protection Methods of Embedded Operating System Software Based on Hardware Compiler

2013 ◽  
Vol 443 ◽  
pp. 556-560
Author(s):  
Gao Ming He
Keyword(s):  
Operating System ◽  
Practical Significance ◽  
Embedded Operating System ◽  
System Software ◽  
Software Protection ◽  
Performance Loss ◽  
Cycle Simulation ◽  
Protection Technology ◽  
Program Flow ◽  
High Level

This paper describes a system; CODESSEAL can provide protection and evaluation to system software. CODESSEAL was designed to protect embedded systems with sufficient expertise and resources to capture attack equipment and manipulator, not only to protect software but also to protect hardware. By using the reconfigurable hardware allows CODESSEAL to provide confidentiality, integrity of security services and a platform-independent program flow without having to redesign the processor. System uses software and data protection technology and designs cycle simulation methods for data analysis. Experimental results show that the protected instructions and data with a high level of safety can be realized a low, which in most cases the performance loss can be reduced to below 10%, so the research of software protection methods of the embedded operating system of hardware compiler has important practical significance.

scholarly journals Hard Dental Tissues Regeneration—Approaches and Challenges

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2558
Author(s):  
Mihaela Olaru ◽  
Liliana Sachelarie ◽  
Gabriela Calin
Keyword(s):  
Tissue Engineering ◽  
Stem Cells ◽  
Stem Cell ◽  
Growth Factors ◽  
Present Review ◽  
Modern Concept ◽  
Dental Tissues ◽  
Tissue Engineering Approach ◽  
Hard Dental Tissues ◽  
Review Reports

With the development of the modern concept of tissue engineering approach and the discovery of the potential of stem cells in dentistry, the regeneration of hard dental tissues has become a reality and a priority of modern dentistry. The present review reports the recent advances on stem-cell based regeneration strategies for hard dental tissues and analyze the feasibility of stem cells and of growth factors in scaffolds-based or scaffold-free approaches in inducing the regeneration of either the whole tooth or only of its component structures.

Enabling social networks in an R&D organization

2006 ◽  
Vol 25 (4) ◽  
pp. 237-246
Author(s):  
Tomas Hellström
Keyword(s):  
Social Networks ◽  
Social Network ◽  
Qualitative Study ◽  
Network Formation ◽  
Higher Order ◽  
Practical Significance ◽  
Administrative Unit ◽  
High Level ◽  
Social Network Formation

This paper presents a qualitative study of mechanisms enabling social network formation in the R&D unit of a large technology-based organization. Drawing on interviews with 37 high-level technical and administrative unit members, a number of social network enablers could be discerned, which related to the need for effective location mechanisms, special “enrolment spaces”, and mechanisms for forging contacts. It was also possible to identify a number of higher-order factors for facilitation of network formation, namely hierarchical enablers and communicative and assimilative factors. Based on these results, the paper makes suggestions as to the theoretical and practical significance of social network enabling mechanisms in R&D organizations.

Conditions for the development of the philosophy of non-violence in the modern world

2020 ◽  
pp. 337-352
Author(s):  
Tolganay V. Mustafina-Kulchmanova ◽  
Zhabayhan M. Abdildin ◽  
Kudaibergen A. Temirgaliev ◽  
Kuralay S. Yermagambetova ◽  
Manifa S. Sarkulova
Keyword(s):  
Public Opinion ◽  
Comparative Study ◽  
Political Science ◽  
Practical Significance ◽  
Modern World ◽  
Practical Application ◽  
Theoretical Methods ◽  
University Teachers ◽  
Analysis And Synthesis ◽  
And Behavior

This article addresses the issues of the genesis of non-violence and the practical application of non-violent practices in the context of modern realities. The phe-nomenon of non-violence is seen in close connection with violence, which is more often reflected in the form of wars, military clashes, and conflicts. The article pro-vides an analysis of the use of non-violent practices and the possibility of develop-ing peacekeeping in public opinion and behavior. During the preparation of this article, a review and comparative study of various literature aimed at studying non-violence were carried out. Together with the philosophical works, various ma-terials of a political science character are studied. In preparing this work, they were used as general theoretical methods, such as analysis and synthesis. At the same time, analogies, systematization, etc. were used. The materials of the article sug-gest practical significance for university teachers of humanitarian/philosophical specialties.

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