Face Proportion : Vertical Direction

The lower part is also known as anteroinferior facial height
The face proportion has 2 directions, the vertical dirction and the sagittal direction. In vertical direction, the face is divided into 3 parts:
1. upper
2. medium
3. lower
The upper third part is located between the trichion and the glabella points. The trichion and glabella points are sometimes difficult to locate. Trichion is where the upper partof forehead ends and the scalp starts. Glabella is marked between the eyebrows, few millimeteers above the nasion.
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