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Postoperative stability following bilateral intraoral vertical ramus osteotomy based on amount of setback

Authors
 Hwi-Dong Jung  ;  Young-Soo Jung  ;  Sang Yoon Kim  ;  Dong Wook Kim  ;  Hyung-Sik Park 
Citation
 BRITISH JOURNAL OF ORAL & MAXILLOFACIAL SURGERY, Vol.51(8) : 822-826, 2013 
Journal Title
BRITISH JOURNAL OF ORAL & MAXILLOFACIAL SURGERY
ISSN
 0266-4356 
Issue Date
2013
MeSH
Adolescent ; Adult ; Cephalometry/methods ; Chin/pathology ; Cohort Studies ; Facial Asymmetry/surgery ; Female ; Follow-Up Studies ; Humans ; Jaw Fixation Techniques ; Male ; Mandible/pathology* ; Mandibular Osteotomy/methods* ; Middle Aged ; Physical Therapy Modalities ; Prognathism/surgery ; Range of Motion, Articular/physiology ; Recurrence ; Retrospective Studies ; Young Adult
Keywords
Intraoral vertical ramus osteotomy ; Postoperative stability ; Relapse
Abstract
Our aim was to evaluate the postoperative stability associated with differing degrees of mandibular setback and their relations after intraoral vertical ramus osteotomy (IVRO). We planned a retrospective cohort study of 94 patients (mean age (range) 23 (18–46) years) selected from a larger group who had been diagnosed with mandibular prognathism with or without facial asymmetry and who had mandibular setback by IVR osteotomy from 2004 to 2009. The preoperative, 7-day, and 12-month postoperative lateral cephalographs were measured to find out the degree of movement, and the vertical and horizontal positions of menton and pogonion were compared at different time points to measure stability. The mean (SD) setback was 10.5 (5.1) mm, with 0.8 (1.1) posterior relapse at 12 months. The mean surgical change of menton vertically was 3.0 (3.0) mm superiorly, with an additional 1.3 (1.05) mm at 12 months. The amount of posterior relapse was less as the amount of setback increased but not significantly so. The amount of setback therefore has minimal effects on anterior relapse, and cannot be considered singly as a variant that affects the degree of stability. The risk of anterior relapse is low even with a substantial degree of mandibular setback, so overcorrection is not necessary with the IVR osteotomy.
Full Text
http://www.sciencedirect.com/science/article/pii/S0266435613000491
DOI
10.1016/j.bjoms.2013.02.001
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Oral and Maxillofacial Surgery (구강악안면외과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Dong Wook(김동욱) ORCID logo https://orcid.org/0000-0001-6167-6475
Park, Hyung Sik(박형식)
Jung, Young Soo(정영수) ORCID logo https://orcid.org/0000-0001-5831-6508
Jung, Hwi Dong(정휘동) ORCID logo https://orcid.org/0000-0003-1025-8323
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/88623
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