Related Experiment Video
Updated: Jun 19, 2026
Treatment of Facial Deformities using 3D Planning and Printing of Patient-Specific Implants
Published on: May 23, 2020
Asymmetry of the lips of orthognathic surgery patients
Yoko Yamashita1, Yoshiki Nakamura, Tatsuo Shimada
1Department of Orthodontics, School of Dental Medicine, Tsurumi University, Yokohama, Japan. yamashita-yoko@tsurumi-u.ac.jp
Introduction:
The purpose of this study was to examine asymmetry of the lips in patients with jaw deformity and facial asymmetry.
Methods:
Pretreatment and posttreatment frontal facial photographs of 17 patients who had mandibular prognathism with facial asymmetry were analyzed. Linear and angular measurements were made on the photographs to assess the asymmetry of the lips. The upper and lower vermilion borders of the lips were divided into quadrants according to the y-axis, and each was measured. In addition, skeletal deviation (position of menton) was determined from the frontal cephalograms.
Results:
The pretreatment linear and angular measurements showed asymmetry of the lips, but this significantly improved after treatment, and the lip form was almost symmetrical. The areas of vermilion border in the upper and lower lips became almost even during treatment. The ratio of the areas on the 2 sides was nearly 1.00. There was little correlation between the horizontal skeletal changes of menton and lip form.
Conclusions:
Asymmetry of the lips caused by deviation of the mandible can be almost completely corrected by orthognathic treatment.
More Related Videos
19:53Single-stage Dynamic Reanimation of the Smile in Irreversible Facial Paralysis by Free Functional Muscle Transfer
Published on: March 1, 2015
05:54Real-Time Dynamic Navigation System for the Precise Quad-Zygomatic Implant Placement in a Patient with a Severely Atrophic Maxilla
Published on: October 18, 2021
