An Evaluation of Initial Stability after Maxillary Posterior Impaction

상악의 후상방 회전이동을 시행한 환자에서의 초기 안정성 평가

  • Ahn, Sang-Wook (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University) ;
  • Kwon, Taek-Kyun (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University) ;
  • Lee, Sung-Tak (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University) ;
  • Song, Jae-Min (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University) ;
  • Kim, Tae-Hoon (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University) ;
  • Hwang, Dae-Seok (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University) ;
  • Shin, Sang-Hoon (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University) ;
  • Chung, In-Kyo (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University)
  • 안상욱 (부산대학교 치의학전문대학원 구강악안면외과학교실) ;
  • 권택균 (부산대학교 치의학전문대학원 구강악안면외과학교실) ;
  • 이성탁 (부산대학교 치의학전문대학원 구강악안면외과학교실) ;
  • 송재민 (부산대학교 치의학전문대학원 구강악안면외과학교실) ;
  • 김태훈 (부산대학교 치의학전문대학원 구강악안면외과학교실) ;
  • 황대석 (부산대학교 치의학전문대학원 구강악안면외과학교실) ;
  • 신상훈 (부산대학교 치의학전문대학원 구강악안면외과학교실) ;
  • 정인교 (부산대학교 치의학전문대학원 구강악안면외과학교실)
  • Received : 2011.04.08
  • Accepted : 2011.05.09
  • Published : 2011.05.31

Abstract

Purpose: This study was designed to retrospectively evaluate the postsurgical initial stability of the Le Fort I osteotomy with posterior impaction and rigid internal fixation for the correction of mandibular prognathism with midface deficiency. Particular attention was paid to the magnitude and direction of the initial postsurgical change. Methods: 20 healthy patients with mandibular prognathism and midface deficiency participated in this study. All patients underwent Le Fort I osteotomy with posterior impaction and mandibular setback BSSO by one surgeon. Preoperative (T0), immediate postoperative (T1) and follow-up period (T2) cephalograms were taken and analyzed. Change between T0~T1 and T1~T2 was measured and analyzed. Results: Between T0~T1, significant differences were observed in all measurements except the ANS point and mandibular plane angle. Between T1~T2, only the occlusal plane angle was significantly changed. No significant changes were found in all other measurements. Conclusion: This study indicates that Le Fort I osteotomy with posterior impaction is stable at initial stages. Although changes in the occlusal plane angle were observed, it was caused by tooth movement after post-operative orthodontic treatment. However, more studies with larger samples are required to form definitive conclusions. Conclusion: This study indicates that Le Fort I osteotomy with posterior impaction is stable at initial stages. Although changes in the occlusal plane angle were observed, it was caused by tooth movement after post-operative orthodontic treatment. However, more studies with larger samples are required to form definitive conclusions.

Keywords

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