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Journal of Dental Research, Vol 67, 484-486, Copyright © 1988 by International & American Associations for Dental Research Online Journals

ARTICLES

Fraunhofer diffraction of light by human enamel

W. J. O'Brien
Department of Biomaterials, School of Dentistry, University of Michigan, Ann Arbor 48109-1078, USA.

Fraunhofer diffraction patterns of human enamel samples were photographed with a helium-neon laser beam (lambda = 633 nm). The first-order diffraction angle was in reasonable agreement with a prediction based upon enamel prisms acting as a two-dimensional grating. These results support the hypothesis that enamel diffracts light because of the periodic structure of enamel prisms with interprismatic spaces, which act as slits.




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