Journal of the Korean Association of Oral and Maxillofacial Surgeons

The Korean Association of Oral and Maxillofacial Surgeons (대한구강악안면외과학회)
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CLINCAL ANALYSIS OF SKELETAL STABILITY AFTER BSSRO FOR CORRECTION OF SKELETAL CLASS III MALOCCLUSION PATIENTS WITH ANTERIR OPEN BITE

전치부 개방교합을 동반한 골격성 제3급 부정교합 환자에 대한 양측 하악지 시상분할 골절단술후 안정성에 관한 임상적 분석

  • Kim, Hyun-Soo (Dept. of Dentistry, Kumi CHA Hospital, College of Medicine Pochon CHA University) ;
  • Kwon, Tae-Geon (Dept. of Oral & Maxillofacial Surgery, School of Dentistry, Kyungpook National University) ;
  • Lee, Sang-Han (Dept. of Oral & Maxillofacial Surgery, School of Dentistry, Kyungpook National University) ;
  • Kim, Chin-Su (Dept. of Oral & Maxillofacial Surgery, School of Dentistry, Kyungpook National University) ;
  • Kang, Dong-Hwa (Dept. of Oral & Maxillofacial Surgery, School of Dentistry, Kyungpook National University) ;
  • Jang, Hyun-Jung (Dept. of Oral & Maxillofacial Surgery, School of Dentistry, Kyungpook National University)
  • 김현수 (포천중문의과대학 구미차병원 치과학교실) ;
  • 권대근 (경북대학교 치과대학 구강악안면외과학교실) ;
  • 이상한 (경북대학교 치과대학 구강악안면외과학교실) ;
  • 김진수 (경북대학교 치과대학 구강악안면외과학교실) ;
  • 강동화 (경북대학교 치과대학 구강악안면외과학교실) ;
  • 장현중 (경북대학교 치과대학 구강악안면외과학교실)
  • Published : 2007.04.30
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Abstract

This study was conducted to patients visited oral maxillo-facial surgery, KNUH and the purpose of the study was to assess skeletal and dento-alveolar stability after surgical-orthodontic correction treated by skeletal Class III malocclusion patients with open bite versus non-open bite. This retrospective study was based on the examination of 40 patient, 19 males and 21 females, with a mean age 22.3 years. The patients were divided into two groups based on open bite and non-open bite skeletal Class III malocclusion patients. The cephalometric records of 40 skeletal Class III malocclusion patients (open bite: n = 18, non-open bite: n = 22) were examined at different time point, i.e. before surgery(T1), immediately after surgery(T2), one year after surgery(T3). Bilateral sagittal split ramus osteotomy was performed in 40 patients. Rigid internal fixation was standard method used in all patient. Through analysis and evaluation of the cephalometric records, we were able to achieve following results of post-surgical stability and relapse. 1. There was no significant statistical differences between open bite and non-open bite with skeletal Class III malocclusion patients in maxillary occlusal plane angle of pre-operative stage(p>0.05). 2. Mean vertical relapses of skeletal Class III malocclusion patients with open bite were $0.02{\pm}1.43mm$ at B point and $0.42{\pm}1.56mm$ at Pogonion point. In skeletal Class III malocclusion patients with non-open bite, $0.12{\pm}1.55mm$ at B point and $0.08{\pm}1.57mm$ at Pogonion point. There was no significant statistical differences between open bite and non-open bite with skeletal Class III malocclusion patients in vertical relapse(p>0.05). 3. Mean horizontal relapses of skeletal Class III malocclusion patients with open bite were $1.22{\pm}2.21mm$ at B point and $0.74{\pm}2.25mm$ at Pogonion point. In skeletal Class III malocclusion patients with non-open bite, $0.92{\pm}1.81mm$ at B point and $0.83{\pm}2.11mm$ at Pogonion point. There was no significant statistical differences between open bite and non-open bite with skeletal Class III malocclusion patients in horizontal relapse(p>0.05). 4. There were no significant statistical differences between open bite and non-open bite with skeletal Class III malocclusion patients in post-surgical mandibular stability(p>0.05). and we believe this is due to minimized mandibular condylar positional change using mandibular condylar positioning system and also rigid fixation using miniplate 5. Although there was no significant relapse tendency observed at chin points, according to the Pearson correlation analysis, the mandibular relapse was influenced by the amount of vertical and horizontal movement of mandibular set-back(p=0.05, r>0.304).

Keywords

References

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