Maxillofacial Plastic and Reconstructive Surgery

Korean Association of Maxillofacial Plastic and Reconstructive Surgeons (대한악안면성형재건외과학회)
권호 표지

Initial Stability after Bilateral Sagittal Split Ramus Osteotomy Application in Patients with Mandibular Prognathism

하악골 전돌증 환자에서 하악지 시상분할골 절단술 적용술 후 초기 안정성 평가

  • Kwon, Myung-Hee (Department of Oral and Maxillofacial Surgery, School of Dentistry, and Institute of Oral Bio-Science, Chonbuk National University, Brain Korea 21 Project) ;
  • Leem, Dae-Ho (Department of Oral and Maxillofacial Surgery, School of Dentistry, and Institute of Oral Bio-Science, Chonbuk National University, Brain Korea 21 Project) ;
  • Baek, Jin-A (Department of Oral and Maxillofacial Surgery, School of Dentistry, and Institute of Oral Bio-Science, Chonbuk National University, Brain Korea 21 Project) ;
  • Shin, Hyo-Keun (Department of Oral and Maxillofacial Surgery, School of Dentistry, and Institute of Oral Bio-Science, Chonbuk National University, Brain Korea 21 Project) ;
  • Ko, Seung-O (Department of Oral and Maxillofacial Surgery, School of Dentistry, and Institute of Oral Bio-Science, Chonbuk National University, Brain Korea 21 Project)
  • 권명희 (전북대학교 치의학전문대학원 구강악안면외과학교실, 구강생체과학연구소, BK21사업) ;
  • 임대호 (전북대학교 치의학전문대학원 구강악안면외과학교실, 구강생체과학연구소, BK21사업) ;
  • 백진아 (전북대학교 치의학전문대학원 구강악안면외과학교실, 구강생체과학연구소, BK21사업) ;
  • 신효근 (전북대학교 치의학전문대학원 구강악안면외과학교실, 구강생체과학연구소, BK21사업) ;
  • 고승오 (전북대학교 치의학전문대학원 구강악안면외과학교실, 구강생체과학연구소, BK21사업)
  • Received : 2011.02.18
  • Accepted : 2011.04.19
  • Published : 2011.05.31
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Abstract

Purpose: The purpose of this study is to evaluate the post-operative skeletal stability after surgical correction of patients with mandibular prognathism by bilateral sagittal split ramus osteotomy (BSSRO) and to evaluate the horizontal relapse tendency after the surgery. Methods: Twenty-six patients with Class III dental and skeletal malocclusion were selected for this retrospective study. Fifteen of them underwent BSSRO for mandibular setback and eleven of them underwent two-jaw surgery (Lefort I and BSSRO). In each patient, lateral cephalometric radiographs were taken pre-operatively, post-operatively within 1 week, and post-operatively after eight months. After tracing of the cephalometric radiographs, various parameters were measured. The analyses were done by linear measurement to evaluate the change in position of hard tissue B point, pogonion and mandibular plan angle by examination on lateral cephalograms. Results: The horizontal relapse rate was 27.1% at B point and 31.6% at pogonion in patients who underwent BSSRO. The horizontal relapse rate of the group where the amount of correction exceeded 10 mm was 25.69% at B point. Conclusion: There were no statistical differences on the magnitude of setback and direction of rotation of the mandible in mandibular stability. There were also no statistical differences between single mandibular surgery and two-jaw surgery for mandibular stability.

Keywords

References

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