SIMONTON, F. VANCE, and JONES, MARTHA R.: San Francisco, Calif. (May 21, 1939).


A dental lesion, differing from caries in localization and in certain his­topathologic characters, has been observed in mouths of dogs on experimental diets—acid/base imbalance. This lesion is characterized by destruction of teeth en masse, unlike the burrowing process typical of caries. It differs from the latter also in advancing through tooth substance from without, in­ward, along parallel fronts rather than in flame-like or conical extensions ; it resembles the gingival third and senile types of cavities more than any of the other classes. The authors have suggested the term “odontoclasia” for this lesion, which is very difficult to treat from the technical standpoint. Its pre­vention may be attained with an antirachitic diet—cod-liver oil or equivalent, balanced acid/base ash-content—and adequate sunshine.

Hypoplasia, especially microscopic hypoplasia of dentin and enamel, is com­monly associated with odontoclasia, but cannot at present be convicted of any etiologic role. Microscopic hypoplasias of enamel and dentin are not necessarily associated; the former, being less obvious, may escape detection. Odontoclasia has been observed in some rachitic children.

Reference: J. Am. Den. Assoc., 14, 1, 1927.

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