Letter | Published:

Third Molar Polymorphism and the Timing of Tooth Formation

Nature volume 192, page 989 (09 December 1961) | Download Citation

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Abstract

AGENESIS (congenital absence) of the third molar tooth is a familiar polymorphism in man, with a population frequency of at least 9 per cent in Europeans1. Hitherto, congenital absence of this tooth has been considered as an independent trait, or at most associated with reduction in size when agenesis is incomplete. However, there is evidence connecting the presence or absence of the third molar tooth with the timing of formation of the premolar and molar teeth as well.

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References

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    , Amer. J. Orthodont., 46, 363 (1960).

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    , Statistical Methods in Research (Prentice-Hall, New York, 1949).

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    , and , Angle Orthodontist, 30, 70 (1960).

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Affiliations

  1. Fels Research Institute, Yellow Springs, Ohio.

    • STANLEY M. GARN
    • , ARTHUR B. LEWIS
    •  & BATSHEVA BONNÉ

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https://doi.org/10.1038/192989a0

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