Results 181 to 190 of about 611,594 (233)

The wear of dental porcelain in an artificial mouth

Dental Materials, 1986
Abstract 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 ...
R, DeLong, W H, Douglas, R L, Sakaguchi, M R, Pintado   +3 more
openaire   +2 more sources

Masking Power of Dental Opaque Porcelains

Journal of Dental Research, 1984
A 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., Johnson, W. M., O'Brien, W. J.   +2 more
openaire   +3 more sources

Isothermal phase transformations of a dental porcelain

Dental Materials, 2005
The purpose of this investigation was to determine if the change in the leucite weight fraction during an isothermal heat treatment could be estimated by observing the deformation of PFM strips in a high-heating-rate, computer-controlled bending beam viscometer (BBV).Specimens of a commercial body porcelain were fired according to the manufacturer's ...
S Warren, Twiggs, J Rodway, Mackert, Amalia L, Oxford, Janet W, Ergle, Petra E, Lockwood   +4 more
openaire   +2 more sources

Fracture toughness of commercial dental porcelains

Dental Materials, 1986
Abstract 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
openaire   +2 more sources

Thermal expansion of dental alloys and porcelains

Journal of Biomedical Materials Research, 1980
AbstractThe effect of thermal coefficient of expansion (α) mismatch on porcelain‐metal bonding is frequently referred to in the dental literature. Thermally induced stresses may develop at metal‐porcelain system interfaces due to differences in the coefficients of thermal expansion of the porcelains, metals, and metal oxides.
C W, Fairhurst, K J, Anusavice, D T, Hashinger, R D, Ringle, S W, Twiggs   +4 more
openaire   +2 more sources

Viscosity of Dental Porcelain as a Function of Temperature

Journal of Dental Research, 1979
A method for viscosity measurement is described and representative data are given for opaque, gingival, and incisal porcelains. The significance of viscosity in annealing and in stress development due to thermal expansion mismatch is discussed. Thermal history of the porcelain is shown to be important only over a relatively small temperature interval ...
R L, Bertolotti, J E, Shelby
openaire   +2 more sources

Polished versus autoglazed dental porcelain

The Journal of Prosthetic Dentistry, 1990
This study compared the finishes on dental porcelain polished with four different polishing paste systems with oven reglazing and with a porcelain adjustment kit without a polishing paste. The polished/reglazed samples were rated according to quality of finish by independent observers and by scanning electron microscopy.
R L, Raimondo, J T, Richardson, B, Wiedner   +2 more
openaire   +2 more sources

Dental Porcelain

Dental Clinics of North America, 1971
G, Mumford, A, Ridge
openaire   +2 more sources

Densification of Dental Porcelain

Journal of Dental Research, 1957
R F, VINES, J O, SEMMELMAN
openaire   +2 more sources

Dental Porcelain

Transactions of the Indian Ceramic Society, 1952
G. N. Mohanty, D. K. Patwardhan, H. N. Roy   +2 more
openaire   +1 more source