Maxillofacial Plastic and Reconstructive Surgery

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

SKELETAL RELAPSE AFTER SAGITTAL SPLIT RAMUS OSTEOTOMY AND SCREW FIXATION

하악전돌증에서 하악지 시상분할골절단 및 Screw고정후 골성회귀에 관한 연구

  • Lee, Chang-Kug (Dept. of Oral & Maxillofacial Surgery, College of Medicine, Ewha Womans University) ;
  • Kim, Myung-Rae (Dept. of Oral & Maxillofacial Surgery, College of Medicine, Ewha Womans University) ;
  • Choi, Jang-Woo (Dept. of Oral & Maxillofacial Surgery, College of Medicine, Ewha Womans University) ;
  • Yun, Jung-Hoon (Dept. of Oral & Maxillofacial Surgery, College of Medicine, Ewha Womans University)
  • 이창국 (이화여자대학교 의과대학 치과학교실 구강외과) ;
  • 김명래 (이화여자대학교 의과대학 치과학교실 구강외과) ;
  • 최장우 (이화여자대학교 의과대학 치과학교실 구강외과) ;
  • 윤정훈 (이화여자대학교 의과대학 치과학교실 구강외과)
  • Published : 1996.12.31
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Abstract

Skeletal and dental changes were examined in 38 patients of mandibular prognathism who been treated by a bilateral sagittal split osteotomy(SSRO) and internal fixation using titanium mini-screws. All patients were followed up for over 8 months after the surgeries, and postoperative cephalometric measurements were compared at 2 months and at 8 months. Linear measurements of the "Pog-most posterior screws" and angular measurementsts of "SN-Pog'were compared to figure out the change of bony fragments. The significancy of data were tested by unpaired T-test. The results were as follows : 1. The fixation screws were changed in cephalometric position as little as $0.32{\pm}2.51mm$ in SSRO and $0.15{\pm}1.00mm$ in SSRO & Le Fort I Osteotomy.(P<0.05) 2. Mandibular set-back over 5mm resulted in less stability of the fixation screws and higher relapse tendency. 3. The internal fixation using two screws along the inferior border and one on the superior ridge is considered to be very resistant to postoperative relapse of the repositioned bony segments.

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