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J Dent Res 51(4): 1043-1047, 1972
© 1972 International and American Associations for Dental Research
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Calculation of Interfacial Stress in Dental Porcelain Bonded to Gold Alloy Substrate

JOHN P. NIELSEN 1 and JOSEPH J. TUCCILLO 1

1 New York University, New York City, New York 10010, USA, and J. F. Jelenko & Co., New Rochelle, New York

Thermal shear stresses that arise from a mismatch of expansion coefficients (Dgragr) between porcelain and gold alloy can exceed the 13,000 psi shear resistance of the bond. Therefore, calculations of the Dgragr tolerance were made. A Dgragr of 0.125 X 10-6 inch/inch/degrees F is safe.

Submitted on June 12, 1971




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