부산대학교병원 교정과에서 골격성 III굽 부정교합으로 진단되어 술전교정치료를 받고 악안면구강외광서 악교정 수술을 받은 편악 수술순 18명과 양악 수술군 24명을 대상으로 초진, 수술 전, 수술 직후 및 수술 후 6개월 이상 경화 후에 채득한 측모두부방사선규격사진을 이용하여 분석하였다. 편악 수술순과 양약 수술군에서 치료과저에 따른 변화를 조사하여 악교정수술후 하악의 안정성에 영향을 미치는 요소를 알아보조자 분산분석을 기초로 하여 단계적 다중 회귀 분석을 시행하여 다음과 같은 결과를 얻었다. 1. 편악 수술군에서 수술에 의한 이동량, 하악전치 고경의 변화와 술전교정치료에 의한 하악평면각의 변화 및 하악전치의 경사도 변화가 악교정 수술후 하악의 안전성을 잘 설명하였고 결정계수 0.84이었다. 2. 양악 수술군에서 수술에 의한 하악 후방 이동량이 악교정 수술 후 하악의 안전성을 설명하였고 결정계수는 0.28이었다.
The purpose of this study was to investigate the factors affecting the postsurgical mandibular stability for both one- and two-jaw surgery. 18 for one-jaw surgerys and 24 for two-jaw surgerys among skeletal class III malocclusion patients who experienced orthodontic treatment and orthognathic surgery at Pusan National University Hospital were selected Lateral cephalograms taken at the first visit, after presurgical orthodontic treatment, immediately after surgery and follow-up over 6 months, were traced. Based ANOVA, multiple linear regression analysis was completed for one-jaw surgery with postsurgical stability as the criterion and the magnitude of mandibular setback, the change of mandibular incisor height during surgery, the changes of mandibular plane angle and mandibular incisor angle during presurgical orthodontic treatment as affecting factors. Same analysis was completed for two-jaw surgery with postsurgical stability as the criterion and the-magnitude of mandibular setback as affecting factor. The results were as follows: 1. In the one-jaw surgery cases, the magnitude of mandibular setback the change of mandibular incisor height during surgery, the changes of mandibular plane angle and mandibular incisor angle during presurgical orthodontic treatment explained the variability in postsurgical stability with a significant R2 value of 0.84. 2. In the two jaw surgery cases, the magnitude of mandibular setback explained the variability in postsurgical stability with a significant R2 value of 0.28.
