Maxillofacial Plastic and Reconstructive Surgery

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

QUANTITATIVE ASSESSMENT OF NASAL AND UPPER LIP CHANGES AFTER LE FORT I OSTEOTOMY SURGERY USING A 3-DIMENSIONAL COMPUTED TOMOGRAPHY

르포씨 1형 골절단술후 코와 상순의 연조직 변화의 삼차원 컴퓨터 단층촬영을 이용한 정량적 측정에 관한 연구

  • Lee, Won-Deok (Department of Oral and Maxillofacial Surgery, SNU-SMG Boramae Hospital) ;
  • Yoo, Chung-Kyu (Department of Oral and Maxillofacial Surgery, SNU-SMG Boramae Hospital) ;
  • Choi, Jin-Young (Department of Oral and Maxillofacial Surgery, School of Dentistry, Seoul National University)
  • 이원덕 (서울대학교병원운영 서울시보라매병원 구강악안면외과) ;
  • 유충규 (서울대학교병원운영 서울시보라매병원 구강악안면외과) ;
  • 최진영 (서울대학교 치의학대학원 구강악안면외과학교실)
  • Received : 2009.12.28
  • Accepted : 2010.01.13
  • Published : 2010.01.29
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Abstract

Objective: To evaluate nasal and upper lip changes after Le Fort I surgery by means of images taken with a three-dimensional computed tomography (3D-CT). Methods: Fifteen patients (9 female and 6 male, mean age 21.9 years) with preoperative and postoperative 3D-CT were studied. The patients underwent maxillary movement with impaction or elongation, and advancement or setback. With the 3D-CT which presents reconstructive soft tissue images, preoperative and postoperative measurement and analysis were performed for nasal tip projection angle, columellar angle, supratip break angle, nasolabial angle, interalar width, internostril width, columella length and nasal tip projection. Results: Postoperative interalar and internostril widening was significant for all categories of maxillary movement. However, there was little significant relation in all parameters between the amount and direction of maxillary movement. Interestingly, movement of the maxilla with upward did show a little decrease in the columellar angle, supra tip break angle and nasolabial angle. Also movement of the maxilla with forward did show a little advancement in the upper lip position. Conclusion: Changes to the nose clearly occur after orthognathic surgery. There was a significant increase in postoperative interalar width and internostril width with maxillary movement. However, no clear correlation could be determined between amount of change and maxillary movement. Interestingly, maxillary impaction did show a little decrease in the columellar angle, supra tip break angle and nasolabial angle. In addition, we used 3D-CT for more precise analysis as a useful tool.

Keywords

References

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