gnathion


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Related to gnathion: pogonion

gnathion

[′nā·thē‚än]
(anthropology)
The midpoint of the lower margin of the mandible in humans.
(vertebrate zoology)
The most anterior point of the premaxillae on or near the middle line in certain lower mammals.
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References in periodicals archive ?
Bulgular: Vertikal paternler arasinda 'gnathion', 'menton', 'stomion' and 'inferior sulcus to H line' olcumlerinde, cinsiyet ayrimi yapilmaksizin degerlendirildiginde istatistiksel olarak onemli bir fark bulundu.
* Mandibular length left/right (MLL/MLR) (summed distance between gnathion, mental foramen, gonion).
*Manually computed distance between selected two reference points on a scaled graph sheet: 300 mm *Computed distance between the selected two reference points by Akinlolu-Raji image-processing algorithm on 3D facial image: 273 mm *Computed total face height (trichion - gnathion distance) using Akinlolu-Raji image-processing algorithm on 3D facial image: 160 mm.Conversion of computed total face height distance to live size = 160 x 300/273 mm=160 x 1.099 mm =175.8 mm
Gnathion (gn): It is the lowest median landmark on the lower border of mandible.
Six months after the end of treatment, patients underwent computerized measurements of the cervicomental and gnathion angles, and a panel of blinded investigators compared pre- and posttreatment photographs, Dr.
The five landmarks common to all of the tables, the glabella, the nasion, the chin-lip groove, the pogonion, and the gnathion, are all located along the midline of the face.
The other way is to construct a tangent on the mandible lower border and another tangent to the posterior border of the ramus and condyle and measure the angle between these two lines.12 The second method was used to measure the gonial angle as it is not easy to locate the gnathion on the lateral cephalogram.
In the case of the length of the ear, the variables taken into consideration were nasion to subnasale, glabella to subnasale, glabella to trichion, and subnasale to gnathion distances.
Gnathion (gn): the lowest point of mandible where the lower margin of the lower jaw is intersected by the midsagittal plane.
* Mandibular line (ML) was the line drawn anteriorly along the inferior margin of the body of the mandible through the gnathion, which is the middle point on the base of the mandible in the sagittal plane (Plate 1).
The base length of the mandible was measured as the linear distance between the condylion and gnathion (Co-Gn).