The face proportion has 2 directions, the vertical dirction and the sagittal direction. In vertical direction, the face is divided into 3 parts:
The upper third component is located between the trichion and the glabella points. The trichion and glabella points are occasionally hard to locate. Trichion is where the upper partof forehead ends and the scalp begins. Glabella is marked among the eyebrows, couple of millimeteers above the nasion.
The medium component is in between the glabella and subnasal.
The lower portion is in between the subnasal and menton. The said portion is the only portion of the face susceptible to be changed by the orthodontist. Orthodontists use the 1 to 1 proportion with the medium part as parameter. The lower portion is also known as anteroinferior facial height.
For a lot more info about Lower Third Part of the Face, please read this informative article:
Exposure of Maxillary Incisors – http://www.costbraces.org/exposure-of-maxillary-incisors/
For a lot more info on the best possible Therapy for your Orthodontic case, please consult your Dentist. “There is no on the web material nor website that can substitute for specialist guidance.”
 Rodrigues, M: Simplified straight wire technique. Maringa: Dental Press, 2006
Face Proportion : Vertical Direction is a post from: Braces Expense