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Journal of Dental Research
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Serum Fluoride Level and Fluoride Content of Enameloid

K.S. Prostak

Forsyth Dental Center, Department of Electron Microscopy, 140 The Fenway, Boston, Massachusetts 02115

P. Seifert

Forsyth Dental Center, Department of Electron Microscopy, 140 The Fenway, Boston, Massachusetts 02115

Z. Skobe

Forsyth Dental Center, Department of Electron Microscopy, 140 The Fenway, Boston, Massachusetts 02115

We investigated diverse groups of fish species to determine whether the fluorine (F) contents of the dental hard tissues were related. to baseline serum F levels. Serum samples, enameloid, dentin, ganoid/enamel, and bone were analyzed for F by either electron microprobe or wet chemistry. Species were categorized into two groups based on the F content of the enameloid. One group contained greater than 2.6 wt% F in enameloid, whereas the other group had less than 0.45 wt% F in enameloid. The dentin and bone from all species (or, in skates, the cartilage), as well as the ganoid/enamel layer of a Holostean fish (alligator gar), showed consistently low F content. In those species whose teeth developed in sequential rows, the F content of enameloid increased with progressive tooth development. The serum F levels of all fish were below 0.05 µg F/mL (2.63 µmol/L) and were not significantly related to the F content of the enameloid. The results substantiate the idea that F incorporation into enameloid is related to fish phylogeny, not food or habitat. It is suggested that specialized outer dental epithelial cell configurations may facilitate the incorporation of F into enameloid.

Journal of Dental Research, Vol. 70, No. 9, 1266-1271 (1991)
DOI: 10.1177/00220345910700090701
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