Journal of the Korean Association of Oral and Maxillofacial Surgeons

The Korean Association of Oral and Maxillofacial Surgeons (대한구강악안면외과학회)
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THE EVALUATION OF THE POSITIONAL CHANGE OF THE MANDIBULAR CONDYLE AFTER BILATERAL SAGITTAL SPLIT RAMUS OSTEOTOMY USING THREE DIMENSIONAL COMPUTED TOMOGRAPHY IN SKELETAL CLASS III PATIENTS

골격성 3급 부정교합 환자에서 하악지시상분할골절단술 후 3D CT 영상을 이용한 하악과두 위치변화 분석

  • Jang, Jung-Rok (Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institutue, Chonnam National University, 2nd stage of Brain Korea) ;
  • Choi, Guen-Ho (Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institutue, Chonnam National University, 2nd stage of Brain Korea) ;
  • Park, Young-Jun (Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institutue, Chonnam National University, 2nd stage of Brain Korea) ;
  • Kim, Bang-Sin (Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institutue, Chonnam National University, 2nd stage of Brain Korea) ;
  • Yu, Min-Gi (Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institutue, Chonnam National University, 2nd stage of Brain Korea) ;
  • Kook, Min-Suk (Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institutue, Chonnam National University, 2nd stage of Brain Korea) ;
  • Park, Hong-Ju (Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institutue, Chonnam National University, 2nd stage of Brain Korea) ;
  • Ryu, Sun-Youl (Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institutue, Chonnam National University, 2nd stage of Brain Korea) ;
  • Oh, Hee-Kyun (Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institutue, Chonnam National University, 2nd stage of Brain Korea)
  • 장정록 (전남대학교 치의학전문대학원 구강악안면외과학교실, 치의학연구소, 2단계 BK21) ;
  • 최근호 (전남대학교 치의학전문대학원 구강악안면외과학교실, 치의학연구소, 2단계 BK21) ;
  • 박영준 (전남대학교 치의학전문대학원 구강악안면외과학교실, 치의학연구소, 2단계 BK21) ;
  • 김방신 (전남대학교 치의학전문대학원 구강악안면외과학교실, 치의학연구소, 2단계 BK21) ;
  • 유민기 (전남대학교 치의학전문대학원 구강악안면외과학교실, 치의학연구소, 2단계 BK21) ;
  • 국민석 (전남대학교 치의학전문대학원 구강악안면외과학교실, 치의학연구소, 2단계 BK21) ;
  • 박홍주 (전남대학교 치의학전문대학원 구강악안면외과학교실, 치의학연구소, 2단계 BK21) ;
  • 유선열 (전남대학교 치의학전문대학원 구강악안면외과학교실, 치의학연구소, 2단계 BK21) ;
  • 오희균 (전남대학교 치의학전문대학원 구강악안면외과학교실, 치의학연구소, 2단계 BK21)
  • Published : 2009.10.30
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Abstract

Purpose: This study was performed to evaluate three-dimensional positional change of the condyle using 3D CT after bilateral sagittal split ramus osteotomy (BSSRO) in skeletal class III patients. Patients and methods: Nine patients who underwent BSSRO for mandibular set-back in skeletal class III malocclusion without facial asymmetry were examined. Miniplates were used for the fixation after BSSRO. 3-D CT was taken before, immediately after, and 6 months after undergoing BSSRO. After creating 3D-CT images using V-works $4.0^{TM}$ program, axial plane, coronal plane, & sagittal plane were configured. Three dimensional positional change, from each plane to the condyle, of the nine patients was measured before, immediately after, and 6 months after undergoing BSSRO. Results: 1. The mean value of mandibular set-back for nine mandibular prognathism patients was 7.36 mm (${\pm}\;2.42\;mm$). 2. In the axial view, condyle is rotated inward immediately after BSSRO (p < 0.05), comparing with preoperative but outward 6 months after BSSRO comparing with postoperative (p < 0.05). 3. In the axial view, condyle is moved laterally immediately after BSSRO (p < 0.05), comparing with preoperative but regressed 6 months after BSSRO comparing with preoperative (p > 0.05). 4. In the frontal & coronal view, there is changed immediately after and 6 months after BSSRO, comparing with preoperative but no statistical difference. Conclusion: These results indicate that three-dimensional positional change of the condyle in skeletal class III patients is observed lateral displacement & inward rotation immediate after BSSRO, but the condyle in 6 months after BSSRO tends to regress to preoperative position.

Keywords

References

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