골격성 III급 부정교합 환자에서 하악골의 이동량과 교합평면의 변화에 따른 술 후 안정성
Skeletal Stability after Orthognathic Surgery in Severe Skeletal Class III Malocclusion Patients according to Changes in Anteroposterior Discrepancy and Occlusal Planes
이정한, 김성희, 백영재, 안경용, 황대석, 김용덕, 김욱규,
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이정한 ( Lee Jung-Han ) - 부산대학교 치의학전문대학원 구강악안면외과학교실
김성희 ( Kim Sung-Hee ) - 부산대학교 치의학전문대학원 구강악안면외과학교실
백영재 ( Baek Young-Jae ) - 부산대학교 치의학전문대학원 구강악안면외과학교실
안경용 ( Ahn Kyung-Yong ) - 부산대학교 치의학전문대학원 구강악안면외과학교실
황대석 ( Hwang Dae-Seok ) - 부산대학교 치의학전문대학원 구강악안면외과학교실
김용덕 ( Kim Yong-Deok ) - 부산대학교 치의학전문대학원 구강악안면외과학교실
김욱규 ( Kim Uk-Kyu ) - 부산대학교 치의학전문대학원 구강악안면외과학교실
KMID : 0360120120340060404
Abstract
Purpose: The purpose of this study was to evaluate postsurgical facial hard tissue stability after orthognathic surgery with/without posterior impaction in skeletal class III malocclusion patients, and to evaluate the horizontal relapse tendency, according to changes in anteroposterior discrepancy and occlusal planes.
Methods: Ninety patients, who had undergone orthognathic surgery in Pusan National University Dental Hospital, were enrolled in this study. Three main groups were classified as follows: Thirty patients underwent mandibular setback bilateral sagittal split ramus osteotomy (BSSRO) only (BSSRO group, BG); another thirty patients underwent mandibular setback BSSRO and Le Fort I osteotomy with posterior impaction (posterior impaction group, PG); and another thirty patients underwent mandibular setback BSSRO and Le Fort I osteotomy without posterior impaction (non-posterior impaction group, NPG). Preoperative (T0), immediate postoperative (T1) and six-month follow-up period (T2) lateral cephalograms were taken, and various parameters were measured. The analyses were done by linear and angular measurements between T0-T1 and T1-T2, to evaluate postsurgical facial hard tissue stability.
Results: Mean horizontal relapse rates were distributed from 11.81% to 19.08%, and there were significant postsurgical changes (0.52 mm~2.44 mm) at the B point in all 3 groups. But, there were no statistical differences on relapse rate among BG, PG and NPG patients.
Conclusion: In this study, the postsurgical stabilities of BSSRO and Le Fort I osteotomy with/without posterior impaction in skeletal class III malocclusion patients were acceptable. There were no significant statistical differences in mandibular stability according to changes in anteroposterior discrepancy and occlusal planes.
키워드
Mandibular prognathism;Stability;Relapse;Maxillary impaction
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