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Double-layer Color Effects in Porcelain Systems
W.J. O'Brien
University of Michigan, School of Dentistry, Department of Dental Materials, Ann Arbor, Michigan 48109-1078
W.M. Johnston
University of Michigan, School of Dentistry, Department of Dental Materials, Ann Arbor, Michigan 48109-1078
F. Fanian
University of Michigan, School of Dentistry, Department of Dental Materials, Ann Arbor, Michigan 48109-1078
The color of an unshaded body porcelain was determined at three thicknesses on white, gray, and three chromatic backings. Spectral absorption and scattering coefficients of the porcelain were determined from the diffuse reflectance at one thickness on the white and gray backings. These optical coefficients, when utilized with the Kubelka-Munk reflectance theory, accurately predicted the color of the other sample configurations studied. The scattering of the body porcelain was found to decrease with increasing wavelength within the visible spectrum, in accordance with scattering theory for particles not substantially less than the wavelength of the scattered light. For the filtering effects of a translucent material in optical contact with a backing, the Kubelka-Munk reflectance theory described the interaction between the optical absorption and scattering within the translucent material and the reflectance of the backing.
REFERENCES
- Commission Internationale de I'Eclairage ( 1971): Colorimetry, Official Recommendations of the International Commission on Illumination, Publication CIE No. 15 (E-1.3.1), Paris, France: Bureau Central de la CIE.
- Hunter, R.S. (1979): The Measurement of Appearance. New York, NY: John Wiley and Sons, pp. 18-57.
- Judd, D.B. and Wyszecki, G. (1975): Color in Business, Science and Industry, 3rd ed., New York, NY: John Wiley & Sons, pp. 420-438.
- Kelley, K.L. and Judd, D.B. (1976): Color: Universal Language and Dictionary of Color Names, Spec. Publ. 440. Washington, DC: Nat. Bur. of Stand. (U.S.), p. 10.
- Kubelka, P. (1948): New Contributions to the Optics of Intensely Light-scattering Materials. Part I, J Opt Soc 38:448-457.
- Mie, G. (1908): Beitrage zur Optic truber Median, speziell kolloider Metallosungen, Ann Physik 25:377-445.
- Newhall, S.M.; Nickerson, D.; and Judd, D.B.: Final Report of the O.S.A. Subcommittee on the Spacing of the Munsell Colors, J Opt Soc Am 33:385-418.
- Sokal, R.R. and Rohlf, F.J. (1969): Biometry, San Francisco, CA: W.H. Freeman and Co., pp. 239-246.
- Woolsey, G.D.; Johnston, W.M.; and O'Brien, W.J. (1984): Masking Power of Dental Opaque Porcelains, J Dent Res 63:936-939.[Abstract/Free Full Text]
Journal of Dental Research, Vol. 64, No. 6,
940-943 (1985)
DOI: 10.1177/00220345850640061801
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