Maxillofacial Plastic and Reconstructive Surgery

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

TRANSVERSE CHANGE OF THE PROXIMAL SEGMENT AFTER BILATERAL SAGITTAL SPLIT RAMUS OSTEOTOMY IN MANDIBULAR PROGNATHISM USING COMPUTED TOMOGRAPHY

하악전돌증환자에서 하악지시상분할골절단술 후 전산화단층촬영을 이용한 근심골편의 횡적인 변화에 관한 연구

  • Kim, Young-Joon (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonnam National University) ;
  • Kook, Min-Suk (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonnam National University) ;
  • Park, Hong-Ju (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonnam National University) ;
  • Shet, Uttom Kumar (2nd stage of Brain Korea 21 for School of Dentistry) ;
  • Oh, Hee-Kyun (2nd stage of Brain Korea 21 for School of Dentistry)
  • 김영준 (전남대학교 치의학전문대학원 구강악안면외과) ;
  • 국민석 (전남대학교 치의학전문대학원 구강악안면외과) ;
  • 박홍주 (전남대학교 치의학전문대학원 구강악안면외과) ;
  • ;
  • 오희균 (전남대학교 치의학전문대학원 2단계 BK21)
  • Published : 2008.05.30
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Abstract

Purpose: This study was performed to evaluate transverse changes of proximal segment after bilateral sagittal split ramus osteotomy (BSSRO) using 3-D CT in mandibular prognathism. Patients and methods: Twenty-two patients who underwent BSSRO for mandibular set-back in class III malocclusion without facial asymmetry were examined. Miniplates were used for the fixation after BSSRO. Facial CT was taken before and after BSSRO within 3 months. Frontal-ramal inclination (FRI), inter-gonial width (IGW) and intercondylar width (ICW) were measured in 3-D CT images using V-works $4.0^{TM}$ program. Student t-test was used to compare the changes between pre- and post-operative measurements using SPSS 10.0 program. Results: 1. Mean peroperative FRI value ($12.87{\pm}3.43^{\circ}$) was slightly increased to postoperative value ($14.13{\pm}3.72^{\circ}$) (p < 0.05). The average FRI increased 10.42% and the range was from $-2.46^{\circ}$ to $3.34^{\circ}$. 2. Mean peroperative IGW ($99.01{\pm}5.36$) was slightly decreased to postoperative IGW ($96.51{\pm}5.88mm$) (p < 0.05). The average IGW decreased 2.52 % and the range was from $-6.61^{\circ}$ to 0.91 mm. 3. Mean preoperative ICW ($125.01{\pm}5.30mm$) was slightly decreased to postoperative ICW ($125.40{\pm}5.45mm$) (p < 0.05). There is no significant difference between pre- and post-operative ICW. 4. There was significant correlationship between FRI difference and IGW difference (p < 0.05). Conclusions: These results indicate that the lower ramus of the proximal segment is moved inward after BSSRO procedure for mandibular set-back.

Keywords

References

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