Morphologic characteristics of the Alaskan Eskimo dentition: IV. Cusp number and groove patterns of mandibular molars

• Published in: American Journal of Physical Anthropology
• Main Authors: Hasund, Asbjörn, Bang, Gisle
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1985
• Subjects: eskimo*
• Online Access: http://dx.doi.org/10.1002/ajpa.1330670108; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fajpa.1330670108; https://onlinelibrary.wiley.com/doi/pdf/10.1002/ajpa.1330670108

Abstract Data on the permanent dentition of 63 coastal and 33 inland Alaskan Eskimos are presented. The number of cusps and groove pattern of the mandibular molars were recorded. Agenesis of the mandibular third molars was classified and the mesiodistal and buccolingual crown diameter was measured on the first and the second mandibular molars. The predominant pattern of the lower first molars was Y5, while for the second molar the dominating patterns were +5 and +4. In the lower third molar, +5 was found in the majority of cases. For M 1 and M 2 , men showed a stronger tendency toward a conservative pattern than did women. In the case of M 2 , the inland population exhibited a more conservative trait than did the coastal population. No connection was seen between the groove pattern and agenesis of M 3 , however, a reduction in the mesiodistal crown diameter for the second molars was seen when the number of cusps is reduced from 5 to 4.