Effects of orthognathic surgery on facial expressions

本研究的目的是利用计算机系统探讨正颌手术对面部表情的影响，并探讨治疗后面部表情的训练系统。面部表情被定义为一般三维人脸模型中网格点的运动。将个人正面图像手动调整为通用模型。个人面部模型的面部表情可以根据面部动作编码系统的动作单元产生。从正颌手术前后的面部图像中产生了六种表情（惊讶、恐惧、厌恶、愤怒、快乐和悲伤）。42名受试者估计他们的表情。治疗后面部图像产生的惊讶、恐惧和厌恶比治疗前印象深刻。当用户展示自己的面部表情并将其与该系统从用户正面图像生成的面部表情进行比较时，对面部表情的训练很有用。本研究旨在探讨正颌手术对面部表情变化的影响。

The purpose of the present study was to investigate the effects of orthognathic surgery on facial expression by using a computer system, and to examine a training system for facial expression after treatment.A facial expression is defined as a movement of grid points in a generic three dimensional face model. A personal frontal face image was manually adjusted to a generic model. Facial expressions of a personal facial model could be produced according to Action Units on Facial Action Coding System.Six expressions (Surprise, Fear, Disgust, Anger, Happiness and Sadness) were produced from facial images before and after orthognathic surgery. Forty-two subjects estimated their expressions. Surprise, Fear and Disgust produced from a facail image after the treatment impressed deeply than before the treatment.It is useful to train for facial expressions, as a user shows and compares own facial expressions with facial expressions produced from user's frontal face image by this system.The present study was suggested to study the effect of orthognathic surgery on changing facial expressions.