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Journal of Dental Research, Vol 58, 2001-2004, Copyright © 1979 by International & American Associations for Dental Research Online Journals

ARTICLES

Viscosity of dental porcelain as a function of temperature

R. L. Bertolotti and J. E. Shelby

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 in affecting residual stresses.




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