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An X-ray Spectrometric Technique for Measuring Porcelain-Metal Adherence
R.D. Ringle
Section of Dental Materials, Department of Restorative Dentistry, Medical College of Georgia, School of Dentistry, Augusta, Georgia 30912
J.R. Mackert, Jr
Section of Dental Materials, Department of Restorative Dentistry, Medical College of Georgia, School of Dentistry, Augusta, Georgia 30912
C.W. Fairhurst
Section of Dental Materials, Department of Restorative Dentistry, Medical College of Georgia, School of Dentistry, Augusta, Georgia 30912
This study demonstrated a correlation between silicon x-ray counts and area fractions of adherent porcelain as determined by point-counting. This correlation has allowed a method to be devised for measuring area fractions of porcelain adherent to porcelain-fused-to-metal (PFM) fracture surfaces. The described method, after controlled destruction of the porcelain mass, uses silicon x-rays excited by the electron beam in a scanning electron microscope. Under the conditions employed in these studies, the x-ray technique has shown that this gold alloy retains more porcelain than does either of two particular nickel-chromium alloys.
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- O'Brien, W.J.; Seluk, L.W.; Fan, P.L.; and Sanders, D.N.: Classification of Porcelain Enamel Interfacial Fractures, IADR Progr & Abst 40:No. 506, 1976.
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- Test for the Adherence of Porcelain Enamel Cover Coats Direct-to-Steel, PEI BULLETIN T-29(72), Washington. DC: Porcelain Enamel Institute, Inc., 1972, pp. 1-6.
- Standard Recommended Practice for Determining Volume Fraction by Systematic Manual Point Count. ANSI/ASTM E 562-76, Annual Book of ASTM Standards, Part 11, Philadelphia, PA: American Society for Testing and Materials, 1976, pp. 485-495.
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- Ryan, T.A., Jr.; Joiner, B.L. and Ryan, B.F.: MINITAB Student Handbook, North Scituate. MA: Duxburv Press, 1976, pp. 138-141.
- Mackert, J.R., Jr.: Porcelain Bonding of a Nickel-Chromium Dental Casting Alloy. Ph.D. Dissertation, University of Virginia, Charlottesville, Virginia, 1979, p. 76. University Microfilms, Ann Arbor, MI.
Journal of Dental Research, Vol. 62, No. 8,
933-936 (1983)
DOI: 10.1177/00220345830620081801
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