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Science 25 December 1964:
Vol. 146. no. 3652, pp. 1676 - 1678
DOI: 10.1126/science.146.3652.1676
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Articles

Collagenous Layer Covering the Crown Enamel of Unerupted Permanent Human Teeth

Philip T. Levine 1, Melvin J. Glimcher 1, and Laurence C. Bonar 1

1 Department of Orthopedic Surgery, Harvard Medical School, Massachusetts General Hospital, and Forsyth Dental Center, Boston

A tissue layer, which was continuous with the cementum covering the roots, was found external to the crown enamel of normal, unerupted permanent human teeth. Light microscopy, x-ray diffraction, and amino acid analysis indicated that the major constituent of this tissue was collagen.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)