Results 281 to 290 of about 638,404 (342)
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Masking Power of Dental Opaque Porcelains
Journal of Dental Research, 1984A technique was developed to qualify the masking power of undiluted opaque dental porcelain by dilution of opaque powder with a clear glaze powder and by extrapolation of quantitative data gathered by reflectance spectrophotometry. Quantification of reflectance data was made on dilute opaque porcelains using the scattering and absorption coefficients ...
Woolsey, G. D. +2 more
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The wear of dental porcelain in an artificial mouth
Dental Materials, 1986Abstract Simulated occlusal wear studies in an artificial mouth involving enamel occluding on porcelain demonstrated a high coefficient of wear for dental porcelain; in agreement with other workers, an abrasive wear process is postulated. Volume loss due to wear showed good linearity as a function of the number of masticatory cycles with slight ...
Maria R. Pintado +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.
John A. Tesk, Kenzo Asaoka
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Color Stability of Glazed and Polished Dental Porcelains
Journal of Prosthodontics, 2007Abstract Purpose: The purpose of this study was to compare the visual and colorimetric color stability of two ultra low‐fusing and three conventional low‐fusing porcelains on both glazed and polished surfaces. Materials and Methods: Twelve disks, 10 mm in diameter and 3 mm in thickness, were fabricated for each porcelain.
YILMAZ, CANER +4 more
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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 ...
Bum-Soon Lim +4 more
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The 'C'-Test for the Evaluation of Dental Porcelain
Journal of Dental Research, 1985The 'C'-test, which has been employed in the testing of industrial porcelain, offers several advantages when used with dental porcelain. In particular, specimens are similar in size and geometry to porcelain jacket crowns. This study evaluates the application of the 'C'-test for dental porcelain. The results showed good consistency and reproducibility,
P.H. Jacobsen, M.R. Edwards
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Cerium oxide as a silver decolorizer in dental porcelains
Dental Materials, 1998Silver-base alloys are known to produce an esthetically unpleasant yellow-green tint in the dental porcelain when making PFM restorations. Cerium oxide is used in dental porcelains to simulate the natural fluorescence found in human dental enamel, and has also been used in the glass industry as a decolorizer.
Carole L Groh +4 more
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Cyclic Contact Fatigue of Dental Porcelain
Key Engineering Materials, 2013The residual strength of dental porcelain discs were test after cycling fatigue compressive load in this study. Moreover, the effects of stress intensity and cycle frequency to the damage of porcelain were explored. The porcelain specimens were bonded to the epoxy resin blocks, with 12.5mm height. The cycling fatigue contact loads were subjected on the
Hui Juan Chen +4 more
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Efects of batch variation on shade of dental porcelain
The Journal of Prosthetic Dentistry, 1985Three different batches of three commercially available porcelains were applied to 36 specimens of two noble alloys. The shades were visually compared by nine observers. Results indicated the following. No color differences were found among specimens of individual batches.
Rogelio Rey Bosch +5 more
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