scholarly journals PHOTOPOLYMERIZED COMPOSITIONS AND LIGHT SOURCES FOR DENTAL PRACTICE (REVIEW)

2021 ◽  
pp. 7-22
Author(s):  
A. M. Lalatovich ◽  
M. A. Vaniev ◽  
N. V. Sidorenko ◽  
Y. A. Makedonova ◽  
D. Yu. Dyachenko ◽  
...  
Keyword(s):  
Comparative Assessment ◽  
Light Sources ◽  
Dental Practice ◽  
Research Results ◽  
Patent Search ◽  
Practice Review ◽  
Light Curing ◽  
The Creation ◽  
Acrylate Monomers ◽  
Functional Purpose

The review presents an analysis of articles published for the period 2005-2021. in top-rated publications devoted to the research results in the field of creating light-curing (photopolymerizable) compositions for use in dental practice. The information concerning the main ingredients of the compositions: di (meth) acrylate monomers, fillers, pigments, and photoinitiators is summarized. A comparative assessment of light sources, which determine the curing efficiency of materials of such a functional purpose, is presented. The results of a patent search, in the PatentScope database, are presented. For the period 2000-2021. have been identified 692 patents, which are related to the creation of dental photopolymer composites.

scholarly journals The effect of a light source with reduced irradiance on the marginal seal in class V cavities

2008 ◽  
Vol 55 (4) ◽  
pp. 229-237
Author(s):  
Natasa Gajic ◽  
Zeljka Kojic ◽  
Aleksandra Djeri ◽  
Radmila Arbutina ◽  
Zorica Trnic
Keyword(s):  
Light Sources ◽  
Dental Practice ◽  
Human Teeth ◽  
Class V ◽  
Dye Penetration ◽  
Composite Restorations ◽  
Significant Difference ◽  
Light Curing ◽  
Argon Lasers ◽  
Carious Teeth

Introduction: During composite polymerisation, material contraction occurs and leads to microgap formation. Various light sources are used in everyday dental practice for the polymerisation of composite restorations: conventional halogen, xenon, LED light curing units (LCUs) and argon lasers. Aim: The aim of this study was to analyze the effect of an LED LCU with reduced irradiance on the marginal seal of different composite restorations. Material and Method: The study was conducted on 40 extracted human teeth (intact and carious). Class V cavities were prepared on all teeth. Cavities were filled with either Filtek Supreme -3M (20 teeth) or Luksogal - Galenika (20 teeth) and polymerisation was done using an LED source with reduced irradiance (90 mW/cm2). Microleakage was tested using the dye penetration method with silver nitrate. Dye penetration was assessed using a stereo loupe with a microscale and x6 magnification. Results: The obtained results suggested that greater dye penetration occurred in samples restored with Luksogal. There was a statistically significant difference between occlusal (27.00) and gingival (36.90) margins (p<0.05). Dye penetration was observed in all intact and carious teeth restored with Filtek Supreme on both gingival and occlusal margins. A statistically significant difference was observed between gingival (22.90) and occlusal (15.50) margins (p<0.01). Conclusion: Microgaps were observed in all teeth irrespective of the type of composite material used for restoration.

EĞİTİMDE BİREYİ ANLAMAK VE GİZİL YETENEK

2021 ◽  
Vol 7 (27) ◽  
pp. 75-85
Author(s):  
Tuğrul GÜNAY ◽  
Birgül GÜRBÜZER
Keyword(s):  
Educational Philosophy ◽  
Relevant Literature ◽  
Research Results ◽  
The Creation

The aim of the study make inferences in the context of educational philosophy about how the latent talents in people who are the object and subject of education emerge and how they are evaluated. At the same time, it is to bring Rousseau and John Locke's views on educational philosophy to the literature. In this direction, by searching the relevant literature; evaluations and comparisons have been made. The research results, suggestions for other studies to be carried out were presented. It is thought that the determined recommendations will guide the creation of other studies.

scholarly journals Effect of Light-Sources and Thicknesses of Composite Onlays on Micro-Hardness of Luting Composites

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6849
Author(s):  
Francesco De Angelis ◽  
Mirco Vadini ◽  
Mario Capogreco ◽  
Camillo D’Arcangelo ◽  
Maurizio D’Amario
Keyword(s):  
High Power ◽  
Resin Composite ◽  
Composite Layer ◽  
Resin Cement ◽  
Specimen Thickness ◽  
Light Sources ◽  
Curing Time ◽  
Resin Cements ◽  
Halogen Light ◽  
Light Curing

The aim of this study was to compare three different light-curing-units (LCUs) and determine their effectiveness in the adhesive cementation of indirect composite restorations when a light-curing resin cement is used. Two resin composites were selected: Enamel Plus HRI (Micerium) and AURA (SDI). Three thicknesses (3 mm, 4 mm and 5 mm) were produced and applied as overlays and underlays for each resin composite. A standardized composite layer was placed between underlay and overlay surfaces. Light curing of the resin-based luting composites was attained through the overlay filters using LCUs for different exposure times. All specimens were allocated to experimental groups according to the overlay thickness, curing unit and curing time. Vickers Hardness (VH) notches were carried out on each specimen. Data were statistically evaluated. The curing unit, curing time and overlay thickness were significant factors capable of influencing VH values. The results showed significantly decreased VH values with increasing specimen thickness (p < 0.05). Significant differences in VH values were found amongst the LCUs for the various exposure times (p < 0.05). According to the results, a time of cure shorter than 80 s (with a conventional quartz–tungsten–halogen LCU) or shorter than 40 s (with a high-power light-emitting diode (LED) LCU) is not recommended. The only subgroup achieving clinically acceptable VH values after a short 20 s curing time included the 3 mm-thick overlays made out of the AURA composite, when the high-power LED LCU unit was used (VH 51.0). Composite thickness has an intense effect on polymerization. In clinical practice, light-cured resin cements may result in insufficient polymerization for high thickness and inadequate times. High-intensity curing lights can attain the sufficient polymerization of resin cements through overlays in a significantly shorter time than conventional halogen light.

scholarly journals Flicker Vision of Selected Light Sources

2017 ◽  
Vol 17 (5) ◽  
pp. 232-240 ◽  
Author(s):  
Przemysław Otomański ◽  
Grzegorz Wiczyński ◽  
Bartosz Zając
Keyword(s):  
Light Source ◽  
Amplitude Modulation ◽  
Incandescent Lamp ◽  
Laboratory Research ◽  
Light Sources ◽  
Positioning System ◽  
Voltage Fluctuations ◽  
Research Results ◽  
Voltage Generator

Abstract The results of the laboratory research concerning a dependence of flicker vision on voltage fluctuations are presented in the paper. The research was realized on a designed measuring stand, which included an examined light source, a voltage generator with amplitude modulation supplying the light source and a positioning system of the observer with respect to the observed surface. In this research, the following light sources were used: one incandescent lamp and four LED luminaires by different producers. The research results formulate a conclusion concerning the description of the influence of voltage fluctuations on flicker viewing for selected light sources. The research results indicate that LED luminaires are less susceptible to voltage fluctuations than incandescent bulbs and that flicker vision strongly depends on the type of LED source.

scholarly journals ESPIRITUALIDADES PLURAIS DA REFORMA

2017 ◽  
Vol 49 (1) ◽  
pp. 63
Author(s):  
Cláudio Oliveira Ribeiro
Keyword(s):  
Latin American ◽  
Martin Luther ◽  
John Calvin ◽  
Protestant Reformation ◽  
Community Life ◽  
Creative Potential ◽  
Research Results ◽  
Political Views ◽  
The Reformation ◽  
The Creation

RESUMO: A pesquisa centrou-se na análise do percurso teológico da Reforma Protestante, enfatizando a pluralidade dela, as visões politicamente distintas entre seus protagonistas como Martinho Lutero, João Calvino e Thomas Müntzer, e as práticas e espiritualidades igualmente distintas até os dias de hoje. Metodologicamente, seguimos a noção da história como interpretação e o potencial criativo dos entre-lugares culturais, valorizando os aspectos utópicos que possam ser reforçados pela avaliação histórica. Os resultados da pesquisa destacaram alguns desses aspectos como: (i) o valor teológico da dimensão ecumênica, (ii) os processos de renovação eclesial, dentro e fora do contexto protestante, (iii) a criação e o fortalecimento de vida comunitária e crítica, dentro dos parâmetros teológicos da Reforma. Eles devem ser analisados levando-se em consideração as peculiaridades do contexto brasileiro e latino-americano em geral em suas diferentes dimensões.ABSTRACT: The research focused on the analysis of the theological path of the Protestant Reformation, highlighting its plurality, the varied political views among its protagonists, such as Martin Luther, John Calvin and Thomas Müntzer, and the equally different practices and spiritualities of today. Methodologically we followed the notion of history as interpretation and the creative potential of the cultural in-between places, valuing the utopian aspects that might be reinforced by the historical evaluation. The research results highlighted some of these aspects, such as (i) the theological value of the ecumenical dimension, (ii) the processes of ecclesial renewal, inside and outside the Protestant context, and (iii) the creation and strengthening of community life, within the theological parameters of the Reformation. They are to be analyzed taking into consideration the peculiarities of Brazilian and Latin American contexts in their varied dimensions.

scholarly journals Solidarity economy enterprises, social technologies, and institutional environment

2021 ◽  
Vol 15 (1) ◽  
pp. 36-53
Author(s):  
Daniel Teotonio do Nascimento ◽  
Fábio Melges ◽  
Elcio Gustavo Benini
Keyword(s):  
Literature Review ◽  
Empirical Research ◽  
Institutional Environment ◽  
Research Literature ◽  
Solidarity Economy ◽  
Research Results ◽  
Social Technologies ◽  
The Face ◽  
The Creation

The present study aimed at analyzing the positioning, contribution, or limitation of the formal Brazilian institutional environment regarding the creation, promotion, and implementation of Solidary Economic Enterprises and Social Technologies. The path used to carry out this research was the triangulation among documentary research, literature review, and former empirical research results. We found that the formal Brazilian institutional environment has not provided the necessary elements for the strengthening of Solidary Economic Enterprises and Social Technologies. It, therefore, constitutes a space that is not very developed in the face of the existence of such organizations.

scholarly journals INFECTION CONTROL IN DENTAL PRACTICE: REVIEW LITETATURE.

2018 ◽  
Vol 6 (10) ◽  
pp. 402-408
Author(s):  
Ranjeet Dhonkal ◽  
◽  
Urvashi Rai ◽  
Divyashree Chaubey ◽  
SomM D ◽  
...  
Keyword(s):  
Infection Control ◽  
Dental Practice ◽  
Practice Review

scholarly journals Mapping Light Pollution, a CubeSat

2019 ◽  
Author(s):  
Anil Kumar Bheemaiah
Keyword(s):  
Imaging System ◽  
Point Sources ◽  
Pollution Monitoring ◽  
Light Pollution ◽  
Light Sources ◽  
Dual Use ◽  
Far Right ◽  
Delta Sleep ◽  
The Creation ◽  
Night Sky

Abstract:A key addition to the series of papers on non - lethal and reversible weapons, as a trail to peace, creating confidence through technocracy, this paper is on the design of linear light pollution monitoring satellites for combating the ugly menace of night sky pollution and towards PID roles in the creation of DSS support based on SaaS services for precision use of EMI based sleep inducing payloads in very light drones, potentially replacing inaccurate drone bombing.Keywords: PID systems, GIS, Cognitive Geography, Panoptic segmentation, Mapillary, DSS systems, SaaS, EMI Delta Sleep,LiFi, Integration filters(™).What: A dual use technology based on SaaS computing to map point sources of light pollution on the surface of the Earth with filters to distinguish stationary and moving sources. Dual use of this technology in remedying light pollution of the night sky for minimal circadian rhythm disruption and allied health disorders, and in the creation of filters for PID systems , useful in use cases, of anti insurgency strategy, with sleep weapon EMI integration as drone payloads.(Bheemaiah, n.d.)How:Light pollution is mapped using a cubesat imaging system originally developed for LiFi last mile connectivity from street lamps for 6G networking, but instead adopted on the trail-map to peace as a Peace Weapon(™) in anti insurgency strategy.Why:PID systems using moving light sources are critical in detecting insurgency across the pakistan India border, the LOC can be monitored using the above cubesat for confidence building measures as a PID system, to deter infiltration by subversives, preventing expensive disruption by infiltration of sabotage minded subversives.(“[No Title]” n.d.), Similar conflicts calling for peaceful resolution by reversible lethality is called for in technocracy, an apolitical far right strategy towards lasting peace, as endowed by K.O.D(™) or the King Of Doves(™), a symbol of peace.

scholarly journals KONFIGURASI POLITIK DAN KARAKTER HUKUM DALAM PERUMUSAN PERJANJIAN KERJA PERORANGAN DAN PERJANJIAN KERJA BERSAMA

2018 ◽  
Vol 4 (1) ◽  
pp. 89
Author(s):  
Ahmad Hunaeni Zulkarnaen
Keyword(s):  
Research Methods ◽  
Industrial Relations ◽  
Civil Law ◽  
The Political ◽  
Joint Work ◽  
Research Results ◽  
Individual Work ◽  
The Creation ◽  
Labour Legislation ◽  
Political Configuration

The creation of employment and strive through the clarity of the rights and obligations of the parties (worker/workers and employers), to clarify the rights and obligations of the parties in industrial relations, both regarding the rights and obligations are the norms of work (Labour Legislation) as well as the nature of Work Terms (Terms of Employment), need a means of industrial relations in the form of Individual Work Agreements (PKP) who apply individually and joint work Agreement (PKB) who collectively apply. The problem examined concerns the political configuration of the legitimately in the manufacture of PKP and PKB. Research methods in this study using a descriptive analytical. The research results obtained that the making of PKP applies should be qualified legitimately an agreement as provided for in article paragraph (1) 1320 s. d subsection (4) the book of the law of civil law (KUHPerdata), and specifically the process of formulation of the PKB should match the concept of the Welvaartsstaat with the character of the legal product PKB responsive/populistik.Keywords: Political Configuration, Individual Work Agreements, Joint Work Agreement.

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