GNATHIC INDEX Meaning and
Definition
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The gnathic index is a numerical measurement used in the field of physical anthropology to analyze and compare the shape and structure of jaws and facial features in different populations and species. It specifically refers to the ratio between the height and width of the jaw or the facial region, providing insights into the relative prognathism (protrusion) or orthognathism (straightness) of the face.
To calculate the gnathic index, the height of the jaw or facial region is divided by its width, usually multiplied by 100 for easier interpretation. The resulting index value classifies individuals into different categories based on the degree of prognathism or orthognathism. A lower index value indicates a more prognathic face, where the jaw protrudes forward, while a higher value suggests a flatter, more orthognathic face.
The gnathic index is often utilized in anthropological studies to examine and compare variations in facial morphology among different populations, ethnic groups, or even between genders. It can also be helpful in identifying evolutionary or biological differences between species or sub-species.
It is important to note that the use and interpretation of the gnathic index have evolved over time, and it is now often employed in combination with other measurements and analyses to provide a more comprehensive understanding of the shape and structure of the human face and jaws.
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Relation between the basialveolar (basion to alveolar point) and basinasial (basion to nasion) lengths, the latter being taken as 100=basialveolar lengthx100/basinasal length; the result indicates the degree of projection of the upper jaw; alveolar i.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for GNATHIC INDEX
- gnathic indeh
- gnathic indep
- gnathic indey
- gnathicinndex
- g nathic index
- gn athic index
- gna thic index
- gnat hic index
- gnath ic index
- gnathi c index
- gnathic i ndex
- gnathic in dex
- gnathic ind ex
- gnathic inde x
Etymology of GNATHIC INDEX
The etymology of the word "gnathic index" comes from the combination of the Greek word "gnathos" meaning "jaw" and the word "index" from Latin, which refers to a measure or indicator. The term "gnathic index" is mainly used in anthropology and dentistry to describe the relative proportions and dimensions of the jaw.
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