하악 전돌증으로 인한 악교정수술후의 안면 연조직 변화 예측을 위한 컴퓨터 프로그램

Computer program for facial soft tissue predictions following orthognathic surgery associated with mandibular prognathism

The purpose of this study is to predict the change of the facial soft tissue following orthodontic surgery associated with mandibular prognathism. Twenty-one patients were selected who recieved orthognathic surgery in mandible only (13 cases) and in maxilla and mandible simultaneously (8 cases). Ages of the patients were over the 16.8 years. Lateral cephalometric head films were taken just before the operation and post operative film were used that of post-operative minimum 6 months. We evaluated the cases by two methods, 1:1 mean ratios and stepwise multiple regression analysis. The results were as follows. 1. The prediction is more accurate by stepwise multiple regression analysis than by 1:1 mean ratios. 2. The prediction by stepwise multiple regression equation is always available regardless the method of operation. 3. We can make a soft ware program for computerizing by obtaning the stepwise multiple regression equation.