alveolar index

alveolar index
Gnathic Gnath"ic, a. [Gr. gna`qos the jaw.] (Anat.) Of or pertaining to the jaw. [1913 Webster]

{Gnathic index}, in a skull, the ratio of the distance from the middle of the nasofrontal suture to the basion (taken equal to 100), to the distance from the basion to the middle of the front edge of the upper jaw; -- called also {alveolar index}. [1913 Webster]

Skulls with the gnathic index below 98 are orthognathous, from 98 to 103 mesognathous, and above 103 are prognathous. --Flower. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • upper alveolar index — noun : the ratio of the maximum external breadth to the external length of the upper jaw multiplied by 100 …   Useful english dictionary

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  • gnathic index — n the anthropometric ratio of the distance from the nasion to the basion to that from the basion to the alveolar point multiplied by 100 called also alveolar index * * * the degree of prominence of the upper jaw, expressed as a percentage of the… …   Medical dictionary

  • Gnathic index — Gnathic Gnath ic, a. [Gr. gna qos the jaw.] (Anat.) Of or pertaining to the jaw. [1913 Webster] {Gnathic index}, in a skull, the ratio of the distance from the middle of the nasofrontal suture to the basion (taken equal to 100), to the distance… …   The Collaborative International Dictionary of English

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