Application of fuzzy logic to apprasal of facial profile esthetics as a result of orthognathic surgery

Abstract

Facial esthetic improvement is one of the goals of orthognathic surgery. When facial esthetics as a result of surgery is appraised, facial profile is especially paid attention. One of the appraisal method of profile esthetics is a surgeon's subjective estimation, the other is soft tissue profile analysis in which several linear and angular values measured on a lateral cephalometric radiogram are simply compared with the standard values. However, neither ones have an objectivity for the esthetic estimation of an individual profile, We are developing a profile esthetics appraisal system which takes account of fuzziness in evaluating facial esthetics using an expert system.