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J Dent Res 46(4): 731-735, 1967
© 1967 International and American Associations for Dental Research
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X-Ray-Induced Light Emission from Enamel, Bone, and Other Calcium Phosphate Materials

PAUL D. FRAZIER 1, DARWIN W. ENGEN 1, and SHARON K. SCAMACK 1

1 Laboratory of Histology and Pathology, National Institute of Dental Research, National Institutes of Health, Bethesda, Maryland

The results of this investigation indicate that the inorganic phases of bone and enamel phosphoresce for extended periods after X-ray excitation at room temperature. A color change in enamel was observed that reversed in a lighted or dark room. There was a significant difference in the slopes of the decay curves for enamel, bone, and octacalcium phosphate. Furthermore, the slope of the decay curve for bone was unchanged by ashing.

Submitted on December 2, 1966






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