Korean J Orthod.  2005 Jun;35(3):174-181.

Level of perception related to changes in lower facial height

• Park SH
• Kim YJ
• Kook YA

Abstract

Understanding the level of a person's perception of changes that have occurred on the face after orthodontic treatment is critical to the process of orthodontic diagnosis and treatment planning. The purpose of this study was to determine the level of perception of profile and frontal changes in lower facial height. Forty students attending art school participated in a study evaluating the level of a participant's perception of changes in the lower facial height. Participants compared computer-graphic frontal and profile photographs with balanced proportions and photograph simulations of 1, 2, 3, and 4 mm changes in lower facial height from stomion to the chin. At least a 2 mm change in lower facial height for the profile view and 3 mm in the frontal view was needed to be perceived after orthodontic treatment. The level of a person's perception of the change in lower facial height was more sensitive in the profile view than in the frontal view, and information about facial changes given prior to evaluation enhanced the level of perception.

Keyword

Facial esthetics; Lower facial height change; Perception

MeSH Terms

Chin
Diagnosis
Humans