Results 221 to 230 of about 28,477 (258)
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British Ceramic Transactions, 2001
AbstractThree formulations of fluorophlogopite and orthoclase (4 : 1, 1 : 1, and 1 : 4 molar mixes, based on the stoichiometric composition) were prepared utilising local potash feldspar, as the main constituent for dental porcelain containing leucite and fluorophlogopite. Powders of the fritted batches were heat treated for 2 h at between 950 and 1050°
D.M. Ibrahim, E.A. El-Meliegy
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AbstractThree formulations of fluorophlogopite and orthoclase (4 : 1, 1 : 1, and 1 : 4 molar mixes, based on the stoichiometric composition) were prepared utilising local potash feldspar, as the main constituent for dental porcelain containing leucite and fluorophlogopite. Powders of the fritted batches were heat treated for 2 h at between 950 and 1050°
D.M. Ibrahim, E.A. El-Meliegy
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Wear of low-fusing dental porcelains
The Journal of Prosthetic Dentistry, 1999The resistance of wear of dental porcelains is of concern when selecting a material for metal-ceramic and all-ceramic restorations.An in vitro investigation was performed to rank a number of dental porcelains with respect to their wear-resistance properties. Material and methods.
P, Derand, P, Vereby
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Fracture toughness of commercial dental porcelains
Dental Materials, 1986Abstract Ceramic materials suffer from a number of limitations which restrict their use in dental restorations. Chief among these shortcomings is their extreme brittleness which is manifested as a low ability to absorb elastic strain energy during structural failure.
R, Morena, P E, Lockwood, C W, Fairhurst
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The endurance limit of dental porcelain*
Australian Dental Journal, 1974Abstract— Dental porcelain is subject to static fatigue and has an endurance limit to stress. There is great variation to subdestructive loading above that limit. Its reliability necessitates stress be kept below that limit but chemical treatment can raise the endurance limit.
D E, Southan, K D, Jorgensen
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Evaluation of an experimental dental porcelain
Journal of the Mechanical Behavior of Biomedical Materials, 2010The aim of this study was to evaluate fracture toughness, hardness, ceramic/metal bond strength and microstructure of experimental dental porcelain and compare it with commercial type. Specimens of specific dimensions were prepared. Fracture toughness was assessed by a three-point bending test.
Ibrahim M, Hamouda +3 more
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Visco-elastic deformation of dental porcelain and porcelain-metal compatibility
Dental Materials, 1991A computer simulation using a visco-elastic stress analysis was conducted to clarify the effect of the heating rate on deformation temperature of dental porcelain during firing. In this simulation, the following temperature-dependent factors were incorporated: elastic modulus, viscosity, and coefficient of thermal expansion.
K, Asaoka, J A, Tesk
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Metameric effect between dental porcelain and porcelain repairing resin composite
Dental Materials, 2007The objectives were to evaluate the metameric color and hue angle (degrees) changes between dental porcelain and porcelain repairing resin composites.Color of three shades (A2, A3, A3.5) of one brand of dental porcelain and three original shades (A2, A3, A3.5) and three combinations (A2-A3, A3-3.5, A2-A3.5) of three brands of porcelain repairing resin ...
Sung-Hee, Kim +4 more
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Densification of Dental Porcelain
Journal of Dental Research, 1957R F, VINES, J O, SEMMELMAN
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