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Chand, Pooran
- An In Vitro Study to Evaluate Retentive Property of Resinous Dental Adhesives and other Dental Luting Cements
Authors
1 Department of Prosthodontics, King George Medical University, Lucknow, Uttar Pradesh, IN
Source
International Journal of Medical and Dental Sciences, Vol 4, No 1 (2015), Pagination: 554-559Abstract
Background: Retention of crowns depends on various factors such as the retentive properties of the luting cements and the type of cast metal. Limited information is available regarding the retentive strengths of crowns, cemented with resin cements.
Objective: The purpose of the study was to evaluate the retentive property of resinous dental adhesives with three other luting cements.
Material and methods: Twenty freshly extracted human sound first mandibular molar was used for the study. The ischolar_main of each tooth was embedded into a cylindrical shape block of self cured resin. Each of the tooth samples was prepared to receive a full metal crown. Total samples were divided into four groups, each containing five samples, for cementation of the metal crown in order to compare retentive properties of resinous adhesive and other luting agents; group A- resinous adhesive Panavia, group B - Zinc Phosphate cement, Group C- Glass ionomer cement, and group D- polycarboxylate cement. After 10min of cementation, the retention test was performed in an Instron tensile testing machine, to analyze the retentive properties of different luting cements. A one-way analysis of variance was used to analyze the data, with a significance level of alpha =.05.
Results: Result showed a maximum mean retentive strength in Panavia Ex. (281.34kg), followed by Glass Ionomer (70.21kg), Polycarboxylate (63.06kg), and least in Zinc Phosphate cement (40.31 kg), which was statistically significant.
Conclusion: Within the limitation of the present study, it was concluded that resinous adhesive Panavia Ex. cement has better retentive properties compare to other luting cements.
Keywords
Cements, Metal Crown, Retention, Resin Cements, Strength.Full Text
- Study on Selection Parameters for Yield Components in Yellow Sarson (Brassica rapa Var. Yellow Sarson)
Authors
1 Division of Genetics, IARI, New Delhi, IN
2 Department of Genetics and Plant Breeding, N.D. University of Agriculture and Technology, Faizabad (U.P.), IN
3 Department of Genetics and Plant Breeding, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut (U.P.), IN
4 Department of Botany, C.C.S. University, Meerut (U.P.), IN
Source
International Journal of Plant Sciences, Vol 12, No 2 (2017), Pagination: 196-200Abstract
An experiment was conducted to assess the genetic variability, heritability and genetic advance during Rabi-2012-13 at N.D.U.A. and T., Faizabad with forty four germplasm of yellow sarson. The data were recorded on 13 characters days to 50% flowering, days to maturity, plant height (cm), primary branches per plant, length of main raceme (cm), number of siliquae on main raceme, number of seeds per siliqua, length of siliqua (cm), biological yield (g), seed yield per plant (g), harvest index (%), 1000-seed weight (g) and oil content (%). The highest estimates phenotypic (PCV) and genotypic (GCV) co-efficient variation were found in plant height (cm) PCV=52.81 per cent, GCV=41.73 per cent. The lowest value of PCV and GCV was recorded for siliqua length (PCV=0.14%, GCV=0.06%), the value of heritability (h2b) ranged from 15.56 (oil content) to 92.32 per cent (days to 50 % flowering). Higher estimates of heritability were observed for days to 50 per cent flowering, primary branches (87%), seed yield/plant (88.11%) and plant height (79.03%) genetic advance in per cent of mean was exhibited highest for primary branches per plant (49.07%) and lowest for oil content (0.55%).Keywords
Yellow Sarson, Genotypes and Phenotypes Co-Efficient of Variation, Heritability and Genetic Advance in Percentage of Mean.
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