Maxillofacial Plastic and Reconstructive Surgery

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

A CEPHALOMETRIC STUDY ON CHANGES OF FACIAL MORPHOLOGY IN THE FRONTAL VIEW FOLLOWING MANDIBLE SETBACK SURGERY ( BSSRO ) IN PATIENTS WITH SKELETAL CLASS III DENTOFACIAL DEFORMITIES

골격성 제3급 부정교합환자의 하악지 시상분할 골절단술후 하안면 폭경 및 고경의 변화에 대한 두부계측 방사선학적 연구

  • Jang, Hyon-Seok (Division of Oral and Maxillofacial Surgery, Dept. of Dentistry, College of Medicine, Korea University) ;
  • Rim, Jae-Suk (Division of Oral and Maxillofacial Surgery, Dept. of Dentistry, College of Medicine, Korea University) ;
  • Kwon, Jong-Jin (Division of Oral and Maxillofacial Surgery, Dept. of Dentistry, College of Medicine, Korea University) ;
  • Lee, Bu-Kyu (Division of Oral and Maxillofacial Surgery, Dept. of Dentistry, College of Medicine, Korea University) ;
  • Son, Hyoung-Min (Division of Oral and Maxillofacial Surgery, Dept. of Dentistry, College of Medicine, Korea University)
  • 장현석 (고려대학교 의과대학 치과학교실) ;
  • 임재석 (고려대학교 의과대학 치과학교실) ;
  • 권종진 (고려대학교 의과대학 치과학교실) ;
  • 이부규 (고려대학교 의과대학 치과학교실) ;
  • 손형민 (고려대학교 의과대학 치과학교실)
  • Published : 2000.09.30
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Abstract

Purpose : The purpose of this study was to analyze the lower third facial changes in frontal view after mandibular setback surgery. Materials and Methods : In this study, fifteen subjects(6 males and 9 females) with class III dental and skeletal malocclusions who were treated with BSSRO(Bilateral Sagittal Split Ramus Ostetomy) were used. Frontal cephalometric radiographs were taken preoperatively and more than 6 months postoperatively, and hard tissue(H2-Hl) and soft tissue changes (S2-S1) were measured on vertical and horizontal reference lines. In 15 cases, changes which developed more than 6 months after surgery were studied. Results : The results were as follows. 1. In the facial height, hard tissue $decreased(2.46{\pm}2.76mm)$ with statistical significance(P<0.01), and soft tissue also $decreased(1.64{\pm}3.66mm)$. As a result, the facial height generally becomes shorter after sagittal split ramus osteotomy. 2. In the mandibular width, hard tissue $decreased(2.08{\pm}3.59mm)$ with statistical sgnificance(P<0.05), but soft tissue $increased (2.14{\pm}5.73mm)$ without statistically significant difference(P>0.05) postoperatively. 3. In the facial index, hard tissue $decreased(0.23{\pm}2.21%)$, but soft tissue $increased(2.41{\pm}3.46%)$ with statistical significance. Conclusion : One of the main purpose of orthognathic surgery is to achieve facial esthetics and harmony. In order to fullfill this purpose, it is important to carry out a precise presurgical treatment planning by estimating the changes of frontal profile after surgery.

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