Journal of the Korean Association of Oral and Maxillofacial Surgeons

The Korean Association of Oral and Maxillofacial Surgeons (대한구강악안면외과학회)
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POSTOPERATIVE POSITIONAL CHANGE OF CONDYLE AFTER BILATERAL SAGITTAL SPLIT RAMUS OSTEOTOMY ASSOCIATED WITH MANDIBULAR ASYMMETRY

하악골 비대칭 환자의 양측성 하악골 시상분할 골절단술 후 하악과두의 위치 변화

  • Lee, Sung-Keun (Department of Oral & Maxillofacial Surgery, College of Dentistry, Dankook University) ;
  • Kim, Kyung-Wook (Department of Oral & Maxillofacial Surgery, College of Dentistry, Dankook University) ;
  • Kim, Chul-Hwan (Department of Oral & Maxillofacial Surgery, College of Dentistry, Dankook University)
  • 이성근 (단국대학교 치과대학 구강악안면외과학교실) ;
  • 김경욱 (단국대학교 치과대학 구강악안면외과학교실) ;
  • 김철환 (단국대학교 치과대학 구강악안면외과학교실)
  • Published : 2004.10.30
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Abstract

Purpose: After the surgical correction with sagittal split ramus osteotomy, the position of the mandibular condyle in the glenoid fossa and the proximal segment of the mandible change because of bony gap between proximal and distal segment, especially in case of mandibular setback asymmetrically. In this study, positional changes in the condyle and proximal segment after BSSRO were estimated in the mandibular asymmetry patient by analyzing the in submentovertex view and P-A cephalogram for identification of ideal condylar position during surgery. Patients and Methods: The 20 patients were selected randomly who visit Dankook Dental Hospital for mandibular asymmetry. Bilateral sagittal split ramus osteotomy with rigid fixation was performed and P-A cephalogram and submentovertex view was taken at the time of preoperative, immediate postoperative, 3 month postoperative period. Results: Intercondylar length and transverse condylar angle was increased due to inward rotation of proximal segment and anteromedial rotation of lateral pole of condyle head. The condylar position had a tendency to return to the preoperative state and after 3 months return up to about half of the immediate post-operative changes, and all the results showed more changes in asymmetry patient and deviated part of the mandible. Conclusion: Based on all these results above, surgeon should make efforts to have a precise preoperative analysis and to have a ideal condylar position during rigid fixation after BSSRO.

Keywords

References

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