Journal of Dental Research, Vol 63, 1400-1401, Copyright © 1984 by International & American Associations for Dental Research Online Journals
Shear testing of the porcelain-metal bond
J. L. Drummond, R. G. Randolph, V. J. Jekkals and J. W. Lenke
A simple shear test was employed to determine the bonding strength of
porcelain to a gold metal substrate and to a non-precious metal substrate
after they had been aged in double-distilled water at 37 degrees C for four
and 12 months. A 7.4% and 18.1% decrease in bond strength after four months
and 12 months, respectively, was observed for the porcelain-gold system,
and a decrease of 21.2% and 21.4% after four and 12 months, respectively,
for the non-precious-porcelain system. A significant difference was
observed between the bond strengths of the porcelain-metal composites:
51.17 +/- 11.29 MPa for the porcelain-gold system and 31.83 +/- 3.65 MPa
for the porcelain-non-precious system.
