Journal of the Korean Association of Oral and Maxillofacial Surgeons

The Korean Association of Oral and Maxillofacial Surgeons (대한구강악안면외과학회)
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A STUDY ON THE POSTOPERATIVE STABILITY OF LEFORT I OSTEOTOMY IN THE TWO-JAW SURGERY OF THE SKELETAL CLASS III MALOCCLUSION PATIENTS

골격성 제 III급 부정교합 환자의 상하악 동시이동술시 LeFort I 상악골절단술의 술후 안정성에 관한 연구

  • Im, Yang-Hee (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonbuk National University, Institute of Oral Bio-Science) ;
  • Ko, Seung-O (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonbuk National University, Institute of Oral Bio-Science) ;
  • Shin, Hyo-Keun (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonbuk National University, Institute of Oral Bio-Science)
  • 임양희 (전북대학교 치과대학 구강악안면외과학교실, 구강생체과학연구소) ;
  • 고승오 (전북대학교 치과대학 구강악안면외과학교실, 구강생체과학연구소) ;
  • 신효근 (전북대학교 치과대학 구강악안면외과학교실, 구강생체과학연구소)
  • Published : 2001.10.30
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Abstract

Purpose: The purpose of this study was to evaluate the postoperative stability of LeFort I osteotomy in two-jaw surgery of skeletal class III malocclusion and to help the establishment of treatment planning in patients with a skeletal class III malocclusion in the future. Materials and Methods: The lateral cephalograms of 14 patients who had been underwent two-jaw surgery via one-piece LeFort I osteotomy were traced and the landmarks were identified. Repeated tracings and construction of reference planes were done. Comparisons were made from the immediate postoperative to late postoperative results of each landmarks on the horizontal and vertical directions. Conclusions: 1. The horizontal changes of landmark ANS, point A, PNS and Mx6Rt between immediate postoperative to late postoperative data were statistically insignificant(p>0.05). 2. The vertical changes of landmark ANS, point A, PNS, Mx6Cr and Mx6Rt between immediate postoperative to late postoperative data were statistically insignificant(p>0.05). 3. The horizontal change of landmark Mx6Cr between immediate postoperative to late postoperative data was statistically significant(p<0.05). 4. Results showed that it was stable that one-piece LeFort I osteotomy in two-jaw surgery of skeletal class III malocclusion.

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