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1998 Fiscal Year Final Research Report Summary

Effects of orthognathic surgery on facial expressions

Research Project

Project/Area Number 09672098
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 矯正・小児・社会系歯学
Research InstitutionNiigata University

Principal Investigator

TERADA Kazuto  Niigata University, Dental Hospital, Associate Professor, 歯学部附属病院, 助教授 (00139312)

Co-Investigator(Kenkyū-buntansha) MORISHIMA Shigeo  Seikei University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (10200411)
Project Period (FY) 1997 – 1998
KeywordsOrthognathic surgery / Facial expression / Face model / Jaw defomity / Simulation / Rehabilitation
Research Abstract

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.

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Published: 1999-12-08  

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