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Journal of Dental Research
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Effects of Instrument-measuring Geometry on Colorimetric Assessments of Dental Porcelains

R.R. Seghi

University of California at Los Angeles, School of Dentistry, 10833 Le Conte Avenue, Los Angeles, California 90024

Recent developments in optical electronic instrumentation for color control have made the potential use of clinical photometric analysis a future possibility for dental materials selection and custom restoration design. The development of such instrumentation will require a more complete understanding of the performance of current technologies on translucent materials. This study was designed to evaluate the effects of instrument-measuring geometry on color-difference assessments made on dental porcelains. The results indicate that a high degree of correlation can exist between color-difference measurements regardless of the design of the instrument-measuring geometry. This work suggests that the development of clinically useful devices need not be restricted to more traditional integrating-sphere-type designs and that more photometrically efficient alternative designs should be explored.

Journal of Dental Research, Vol. 69, No. 5, 1180-1183 (1990)
DOI: 10.1177/00220345900690051101
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