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Major factors contributing to anterior and posterior relapse after intraoral vertical ramus osteotomy

Authors
 Sung-Hwan Choi  ;  Da-Young Kang  ;  Jung-Yul Cha  ;  Young-Soo Jung  ;  Hyung-Seog Yu  ;  Hyung-Sik Park  ;  Chung-Ju Hwang 
Citation
 JOURNAL OF CRANIO-MAXILLOFACIAL SURGERY, Vol.44(4) : 413-420, 2016 
Journal Title
JOURNAL OF CRANIO-MAXILLOFACIAL SURGERY
ISSN
 1010-5182 
Issue Date
2016
MeSH
Cephalometry ; Humans ; Jaw Fixation Techniques ; Mandible/surgery ; Mandibular Osteotomy/adverse effects ; Mandibular Osteotomy/methods* ; Osteotomy, Sagittal Split Ramus/adverse effects* ; Osteotomy, Sagittal Split Ramus/methods* ; Prognathism/surgery ; Recurrence ; Retrospective Studies
Keywords
Intraoral vertical ramus osteotomy ; Mandibular setback surgery ; Posterior relapse ; Stability
Abstract
The aim of this retrospective cohort study was to investigate the factors contributing to mandibular relapse after intraoral vertical ramus osteotomy (IVRO) while controlling for possible confounders. Forty-seven patients who underwent bimaxillary surgery were divided into three groups according to the direction of horizontal mandibular relapse: a stable group (group S), a posterior relapse group (group P), and an anterior relapse group (group A). Lateral cephalograms were analysed 1 month before and at 7 days and 12 months after surgery. One month before surgery, the pogonion in group A was positioned about 13 mm more anteriorly than in group P (P < 0.05). Immediately after surgery, the mandibles in groups A and S had moved about 6 mm more posteriorly than in group P. At 12 months, both the mandibles (point B) and the maxillae (point A) had moved posteriorly in group P (P < 0.05). A multivariate linear regression analysis showed that the amount of setback was the one key factor predicting postoperative mandibular changes 12 months after IVRO. As the amount of setback decreased, mandibular posterior horizontal relapse increased after IVRO. These findings suggest that the amount of setback can be a key factor predicting postoperative mandibular relapse.
Full Text
http://www.sciencedirect.com/science/article/pii/S1010518216000275
DOI
10.1016/j.jcms.2016.01.013
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Oral and Maxillofacial Surgery (구강악안면외과학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Park, Hyung Sik(박형식)
Yu, Hyung Seog(유형석) ORCID logo https://orcid.org/0000-0002-1275-5078
Cha, Jung Yul(차정열)
Choi, Sung Hwan(최성환) ORCID logo https://orcid.org/0000-0002-1150-0268
Hwang, Chung Ju(황충주) ORCID logo https://orcid.org/0000-0003-3024-4551
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/146490
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