Perception of Students and House Officers for Restoration of Endodonticaly Treated Anterior Teeth

Background: Teeth in the oral cavity are affected by caries, trauma or fracture which causes pulpal diseases in the teeth. Dentists performed root canal treatment to treat these diseases. Caries fracture or trauma along with root canal treatment can weaken the tooth structure. Tooth structure is lost in root canal treatment. Dehydration after pulpectomy can effect on survival of the tooth. That is why an important intention should be paid to restore endodonticaly treated tooth. Study was performed in Multan Dental College Multan. Methods: Study design was cross sectional survey. The questionnaire was prepared for final year BDS students and house surgeons of Multan Dental College with the three conditions of anterior tooth structure; Condition A= Minimal tooth structure missing(less than 50%), Condition B=50% tooth structure missing, Condition C=maximum tooth structure lost (more than 50%). Data was collected randomly and analyzed and tabulated. Results: In condition A maximum participants (47.5%) preferred tooth colored restoration only. In condition B maximum participants (33%) choose tooth colored crown. In condition C maximum participants (67.5%) choose endopost and tooth colored crown. Conclusion: of study is that choice of material and technique of restoration is important for good results. Different dentists prefer different materials and techniques for restoration. Keywords: Endodonticaly treated tooth (ETT), Composite, Amalgam, Endopost

Boundary behavior of large solutions to a class of Hessian equations

In this paper, we consider the m-Hessian equation S m [ D 2 u ] = b ( x ) f ( u ) > 0 in Ω, subject to the singular boundary condition u = ∞ on ∂ Ω. We give estimates of the asymptotic behavior of such solutions near ∂ Ω when the nonlinear term f satisfies a new structure condition.

Sandy soils of pre-Quaternary continental formations Russian territory

The engineering-geological features of the sands included in the pre-Quaternary continental terrigenous formations (red and gray-colored, coal-bearing and lignite-bearing, molasses and molasses coal-bearing), which are widespread in Russia, are characterized. The results of studying the composition, structure, condition and properties of these soils within the various regions of Russia are presented.

ABOUT THE FUNDAMENTAL ASPECTS OF THE GENETIC APPROACH TO THE STUDY OF SOILS

The fundamental methodological and philosophical aspects of the genetic approach to the study of soil formation, the genesis of the composition, structure, state and properties, as well as the role of the spatial position of soils in the array and the role of anthropogenic impacts on soil massifs, including the formation of improved and degraded soils, are considered. In the genetic approach to the study of soils, which became the methodological basis of soil science, is that the composition, structure, condition and properties of soils are considered as the result of their genesis and subsequent postgenetic transformations at the stage of diagenesis, catagenesis, metamorphism and hypergenesis. The distinction of concepts of “soil genesis”, “genesis of soil composition”, “genesis of soil structure”, “genesis of soil condition” and “genesis of soil properties” is shown. When characterizing these concepts, it is necessary to take into account the syngenetic, epi-syngenetic, syn-epigenetic and epigenetic features of soils. In accordance with this, the composition, structure, condition, and properties of soils may be of four classes according to their origin: syngenetic, epi-syngenetic, syn-epigenetic, or epigenetic. The genetic approach plays a particularly important role in the study of anthropogenically-formed and man-made altered soils, as well as in the construction of new genetic classifications of natural and man-made soils. The genetic approach to the study of soils follows from the Priklonsky-SergeevLomtadze law: the composition, structure, condition and properties of soils are determined by their genesis, the nature of postgenetic processes and the modern spatial (coordinate) position. This fundamental approach should underlie the development of new general classifications of soils, which is especially important now, when work is underway to prepare the new GOST 25100 “Soils. General classification”.

Age structure, condition and length increase of the topmouth gudgeon (Pseudorasbora parva Schlegel 1842) in non-native populations of small rivers of Poland

Monitoring studies of ichthyofauna, in particular non-indigenous species, are an important element of research on aquatic ecosystems. This information is essential for modelling population growth and predicting rates of expansion, quantifying ecological impacts and assessing the efficacy of removal and control strategies. Actually, the most compelling fish invasion in Polish freshwaters is arguably the accidental introduction of the topmouth gudgeon (Pseudorasbora parva). Age and lengths structure, condition factor and growth rate of the invasive populations of the topmouth gudgeon from small Polish rivers was examined. The samples were collected from the rivers: Molnica (n = 41), Myśla (n = 21) and Wardynka (n = 101) soon after the invasion was recorded (2017). Estimated ages of topmouth gudgeon ranged from 1+ to 3+ for the Myśla River, from 1+ do 4+ for the Molnica River, and from 1+ to 5+ for the Wardynka River. The fish from the Molnica River was characterised by the lowest total and standard length (TL, SL), weight, and highest condition. The results of back-calculations and the parameters of von Bertalanffy’s growth equation revealed distinct disproportions in the standard length (mm) in individual age groups (Molnica River: Lt = 54.94 [1 – e−0.68885 (1 − 0.003404)], Myśla River: Lt = 55.39 [1 – e−0.74921 (1 – 0.030962)], Wardynka River: Lt = 66.33 [1 – e−0.69348 (1 – 0.369505)]). The introduction of the topmouth gudgeon occurred in the upper and medium sectors of small rivers, but in subsequent years the species migrated to new sites further downstream and this may have affected the native ichthyofauna.

Structure, condition, and prospects of electrical grids in the Republic of Sakha (Yakutia)

The paper analyzes the condition of electrical grids in the west of the Republic of Sakha (Yakutia); data sampled for the last 10 years. It demonstrates the geographic location of grids, which defines the scale of the study. Technical indicators are presented for 10 years; they reflect an increase in the fixed assets. The paper derives mathematical models of the wear of transmission equipment used in the western grids. It proves that the condition of equipment will deteriorate further unless its maintenance is properly funded. The paper analyzes the prospects of electrical grids in the Republic of Sakha (Yakutia). It presents a program for local energy optimization. The costs associated with five alternative development scenarios are calculated and presented in a tabular format.

Determine Environmental Structure Condition of River Sub System of Palembang City’s Rivers using Geospatial Analysis

This paper present geospatial analysis to determine the environmental structure of the river sub-system of Palembang City where 70% of the city is located at lowland with elevation from 0 to 5 m above mean sea level. This lowland terrain condition induced problem of water puddle and flood during a rainfall event. A landscape ecological approach and spatial analysis approach of river sub system (RSS) morphometry characteristic were conducted to determine the environmental structure condition of the RSS. The data used to generate the DEM was the height data obtained from the map of the city line on a scale of 1:1000 with stereophotogrammetric digital technique. The line map contains spot height data made every 20 m distance in the field. From this study, new delineation of RSS boundaries was produced and gave different catchment areas. It is found that the perimeter of the RSS and the mean value of bifurcation ratio determined the value of runoff in the RSS.