하악전돌증 환자에서 악교정수술 후 하악각 및 하악폭경의 변화

• 영문명: CHANGES IN GONIAL ANGLE AND MANDIBULAR WIDTH AFTER ORTHOGNATHIC SURGERY IN MANDIBULAR PROGNATHIC PATIENTS
• 발행기관: 대한구강악안면외과학회
• 저자명: 김인호(In-Ho Kim) 한창훈(Chang-Hun Han) 유선열(Sun-Youl Ryu)
• 간행물 정보: 『대한구강악안면외과학회지』대한구강악안면외과학회지 제32권 제2호, 129~137쪽, 전체 9쪽
• 주제분류: 의약학 > 내과학
• 파일형태: PDF
• 발행일자: 2006.04.30

영문 초록

The treatment plan for orthognathic surgery must be based on accurate predictions, and this can be produced the most esthetic, functional and stable results. The purpose of this study was aimed to evaluate the amount and interrelationship of the gonial angle and the mandibular width change after the mandibular setback surgery in the mandibular prognathic patients. Twenty patients were selected who received orthognathic surgery after presurgical orthodontic treatment. The patients with skeletal and dental Class III malocclusion were operated upon with bilateral sagittal split ramus osteotomy and mandibular setback. The lateral and posteroanterior cephalometric radiographs were taken preoperatively, postoperative 1 day and 12 months later after the orthognathic surgery, and then the gonial angle and mandibular width were measured. The computerized statistical analysis was carried out with SPSS/PC program. The gonial angle at postoperative 1 day was decreased about 5.3othan preoperative value and the gonial angle at postoperative 12 months was increased about 1.4othan postoperative 1 day. So the gonial angle at postoperative 12 months was decreased about 3.9othan preoperative value. The mean preoperative gonial angle was 125.35o±7.36, showing significantly high value than normal and mean gonial angle at postoperative 12 months was 121.45o±6.81, showing value near to normal. The mandibular width at postoperative 1 day was decreased about 1.1 mm than preoperative value and the mandibular width at postoperative 12 months was more decreased about 1.7 mm than postoperative 1 day. So the mandibular width at postoperative 12 months was decreased about 2.8 mm than preoperative value. These results indicate that sagittal split ramus osteotomy in mandibular prognathic patients with high gonial angle is effective to improvement of gonial angle. It is considered to be helpful for maintenance of postoperative stable gonial angle area that detailed postoperative care and follow-up.