The deflecting wrinkle on the teeth of Icelanders and the Mongoloid dental complex

Authors

  • Gudjón Axelsson,

    1. University of Iceland, Faculty of Odontology, Landspitalinn, Reykjavik, Iceland
    2. Institute of Dentistry, University of Turku, SF-20520 Turku 52 Finland
    Search for more papers by this author
  • Pentti Kirveskari

    1. University of Iceland, Faculty of Odontology, Landspitalinn, Reykjavik, Iceland
    2. Institute of Dentistry, University of Turku, SF-20520 Turku 52 Finland
    Search for more papers by this author

Abstract

Three local populations from Northeast Iceland are surveyed for the occurrence of the deflecting wrinkle of the metaconid on second deciduous and first permanent lower molars. The trait occurs more frequently on dm2 than on M1, and no sexual dimorphism is found, as expected. However, the frequencies are clearly within those predicted by the Mongoloid dental complex for Mongoloid populations. It is therefore suggested that the inclusion of the deflecting wrinkle in the Mongoloid dental complex be re-evaluated, and the racial diagnostic value of the trait taken with reservation.

Ancillary