THE SKELETAL STABILITY OF LE FORT I MAXILLARY ADVANCEMENT

Le Fort I 상악골전진술 후 안정성에 관한 연구

  • Seo, Min-Gyo (Department of Oral and Maxillofacial Surgery, School of Dentistry and Institute of Oral Bio-Science, Chonbuk National University, Brain Korea 21 project) ;
  • Koo, Sung-Young (Department of Oral and Maxillofacial Surgery, School of Dentistry and Institute of Oral Bio-Science, Chonbuk National University, Brain Korea 21 project) ;
  • Kim, Eun-Ju (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) ;
  • 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)
  • 서민교 (전북대학교 치의학전문대학원 구강안악면외과학교실, 구강생체과학연구소, BK21사업) ;
  • 구성영 (전북대학교 치의학전문대학원 구강안악면외과학교실, 구강생체과학연구소, BK21사업) ;
  • 김은주 (전북대학교 치의학전문대학원 구강안악면외과학교실, 구강생체과학연구소, BK21사업) ;
  • 임대호 (전북대학교 치의학전문대학원 구강안악면외과학교실, 구강생체과학연구소, BK21사업) ;
  • 신효근 (전북대학교 치의학전문대학원 구강안악면외과학교실, 구강생체과학연구소, BK21사업) ;
  • 고승오 (전북대학교 치의학전문대학원 구강안악면외과학교실, 구강생체과학연구소, BK21사업)
  • Received : 2009.09.22
  • Accepted : 2010.02.22
  • Published : 2010.03.31

Abstract

The purpose of this retrospective study was to evaluate relapse, comparing large and small maxillary advancements with four-plate rigid fixation and without bone grafting. All patients had skeletal class III malocclusion, and underwent bimaxillary surgery. Standardized cephalometric analysis by one examiner was performed on serial radiographs of 14 patients immediately before surgery, and within 1 week and at least 6 months postoperatively (mean 10 months). The group was divided into two subsets to determine whether the magnitude of relapse. In group 1 ($\leq$ 5 mm, n = 8), the average advancement was $4.0{\pm}0.9\;mm$, with a mean relapse of $0.1{\pm}0.5\;mm$. In group 2 (6-8 mm, n = 4), the average advancement was $6.8{\pm}0.9\;mm$, with a mean relapse of $0.7{\pm}0.4\;mm$. There was no statistical difference in the measured relapse among the groups. Maxillary advancement with a 1-piece Le Fort I osteotomy is a relatively stable procedure.

Keywords

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