Representative high gold, gold-palladium, and palladium-silver alloys are shown to have different creep rates at temperatures up to the usual porcelain firing range. Dynamically measured creep rates are interpreted in terms of relative "sag" and margin "opening" tendencies of the alloys.
Get full access to this article
View all access options for this article.
References
1.
Shillingburg, H.T., Jr.; Hobo, S.; and Fisher, D.W.: Preparation Design and Margin Distortion in Porcelain-fused-to-metal Restorations, J Prosth Dent29:276-284, 1973.
2.
Bertolotti, R.L. and Shelby, J.E.: Viscosity of Dental Porcelain as Function of Temperature, J Dent Res58:2001-2004, 1979.
3.
Tuccillo, J.J. and Nielsen, J.P.: Creep and Sag Properties of a Porcelain-Gold Alloy, J Dent Res46:579-583, 1967.
4.
Moffa, J.P.; Lugassy, A.A.; Gucks, A.D.; and Gettleman, L.: An Evaluation of Nonprecious Alloys for Use with Porcelain Veneers. Part 1. Physical Properties, J Prosth Dent, 30:424-431, 1973.
5.
Lugassy, A.A. and Kumamoto, Y.: Creep of Alloys Used in Porcelain-fused-to-metal Restorations, IADR Progr & Abst53: No. 740, 1974.
6.
Anusavice, K.J. ; Ringle, R.D.; and Weber, R.: Dynamic Measurement of Porcelain-fused-to-metal Alloy Sag Resistance, IADR Progr & Abst58:No. 686, 1979.
7.
Bertolotti, R.L.: Calculation of Interfacial Stress in Porcelain-fused-to-metal Systems, J Dent Res, in press.