A thermal shock test was employed to evaluate the crazing resistance of 55 porcelain-metal systems. The effect of the porcelain brand used was the most significant determinant of porcelain crazing. The effects of the alloys and alloy-porcelain combinations, although also significant, were second order effects.
Get full access to this article
View all access options for this article.
References
1.
Rekhson, S.M. : Annealing of Glass-to-metal and Glass-to-ceramic Seals. Part 2. Experimental, Glass Tech20:132-143, 1979.
2.
Neilsen, J.P. and Tuccillo, J.J.: Calculation of Interfacial Stress in Dental Porcelain Bonded to Gold Alloy Substrate, J Dent Res51:1043-1047,1972.
3.
Schurecht, H.G. and Pole, G.R.: Method of Measuring Strains Between Glazes and Ceramic Bodies, J Am Ceram Soc13 :369-375, 1930.
4.
Walton, J.D. , Jr. and Sweo, B.J.: Determination of Strains Between Enamel and Iron by Means of Split Rings, J Am Ceram Soc36: 335-341, 1953.
5.
Whitlock, R.P. ; Tesk, J.A.; Parry , E.E.; and Widera, G.E.O.: A Porcelain Veneered Split Metal Ring for Evaluation of Compatibility of Dental Porcelain-alloy Systems, AADR Progr & Abst59: No. 432, 1980.
6.
Widera, G.E.O. : Tesk, J.A.; and Whitlock , R.P.: Theoretical Stress Analysis of Porcelain Veneered Split Metal Ring for Evaluation of Compatibility of Porcelain-alloy Systems, AADR Progr & Abst59: No. 430, 1980.
7.
Crazing Resistance of Fired Glazed Ceramic Whitewares by a Thermal Shock Method, ASTM Standard Test C 554-71, 1977Annual Book of AST, Standards, Part 17, Philadelphia, PA: American Society for Testing and Materials, 1977.
8.
Private Communication, Dentsply International, York, Pennsylvania.
9.
Cheng, C.M.: Resistance to Thermal Shock, J Am Rocket Soc21:147-153, 1951.
10.
Hasselman, D.P.H.: Unified Theory of Thermal Shock Fracture Initiation and Crack Propagation in Brittle Ceramics, J Am Ceram Soc52:600-604, 1969.
11.
Standard Test Method for Thermal Shock Resistance of Porcelain-Enameled Utensils, ASTM Standard Test C 385-58, 1977Annual Book of ASTM Standards, Part 17, Philadelphia, PA: American Society for Testing and Materials, 1977.
