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Journal of Dental Research
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An Analytical Model to Predict the Effects of Heating Rate and Applied Load on Glass Transition Temperatures of Dental Porcelain

P.H. Dehoff

Mechanical Engineering and Engineering Science Department, University of North Carolina, Charlotte, North Carolina 28223

K.J. Anusavice

Department of Dental Biomaterials, College of Dentistry, University of Florida, Gainesville, Florida 32610

An analytical model was developed to predict the effects of heating rate and load on the glass transition temperature (Tg) of dental porcelain. An equation similar to the Moynihan equation relating heating rate to Tg was found for midspan load. The validity of the analytical model was demonstrated by using viscosity data from one published study to predict Tg behavior in an independent study. Values of Tg calculated with the analytical model for a dilatometer specimen were found to be higher than Tg values calculated for a bending beam viscometer.

Journal of Dental Research, Vol. 65, No. 5, 643-647 (1986)
DOI: 10.1177/00220345860650050201
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K. Asaoka and J.A. Tesk
Transient and Residual Stress in a Porcelain-Metal Strip
Journal of Dental Research, February 1, 1990; 69(2): 463 - 469.
[Abstract] [PDF]