Gonion

Gonion is a term used in the field of anatomy to refer to the lowest posterior point on the angle of the mandible or lower jaw. The term is derived from the Greek words 'gonia', which means angle, and 'on', which means bone. The gonion is a significant anatomical landmark used in orthodontics and craniofacial surgery to assess facial symmetry and growth patterns.

Anatomy

The gonion is located at the angle where the lower border of the mandible meets the posterior border. This point is significant in the analysis of lateral cephalometric radiographs, which are used to study the skeletal relationships in the craniofacial region.

Clinical Significance

The gonion is an important landmark in various fields of medicine. In orthodontics, it is used to determine the growth pattern of the mandible and to plan treatment accordingly. In craniofacial surgery, the gonion helps in the assessment of facial asymmetry. It is also used in forensic medicine for the identification of individuals based on skeletal remains.

Measurement

The gonion can be measured using various methods. The most common method is through cephalometric analysis, where a lateral radiograph of the skull is taken and various points, including the gonion, are marked. The distances and angles between these points are then measured to provide information about the individual's craniofacial structure.

See Also

• Mandible
• Orthodontics
• Craniofacial surgery
• Cephalometric analysis

References

Gonion Resources
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