Document Detail

Change of lip cant after bimaxillary orthognathic surgery.
MedLine Citation:
PMID:  20202735     Owner:  NLM     Status:  MEDLINE    
PURPOSE: The purpose of the present study was to investigate the correlations between lip cant change after bimaxillary orthognathic surgery and the ratio of lip cant change and occlusal cant change after surgery. PATIENTS AND METHODS: The subjects for the present study were obtained from a group of 25 patients who underwent bimaxillary orthognathic surgery for occlusal cant correction at the Department of Oral and Maxillofacial Surgery, Samsung Medical Center (Seoul, South Korea) from January 2000 to December 2005. To be included, a patient's chart had to contain a resting frontal facial photograph in the natural head position and a corresponding posteroanterior cephalogram in occlusion on the same day before surgery and postoperatively 6 months later. The lip cant change was assessed by the angle of each labial commissure and the bi-pupillary reference line. The occlusal canting change in the frontal plane was assessed with the angle between each maxillary first molar occlusal surface and the bi-frontozygomatic suture reference line. RESULTS: With the angular measurement, the average occlusal cant change was 3.09 degrees (standard deviation [SD] 1.05 degrees), and the average lip cant change was 1.56 degrees (SD 1.05 degrees). With the linear measurement, the average occlusal cant change was 2.41 mm (SD 2.75), and the average lip cant change was 1.18 mm (SD 0.43). The lip cant correction ratio to occlusal cant correction was 51.5% +/- 8.4% in the angular measurement and 48.8% +/- 9.1% in the linear measurement. With Pearson's correlation analysis, the Pearson correlation coefficient was 0.869 for the angular measurement and 0.887 for the linear measurement. A high correlation was shown between the occlusal cant change and lip cant change. CONCLUSIONS: Bimaxillary orthognathic surgery can correct lip cant and occlusal cant. The average amount of lip cant correction and occlusal cant correction in our study was 51.5% +/- 8.4% and 48.8% +/- 9.1%, respectively.
Young Ho Kim; Juhong Jeon; Joan Thomas Rhee; Jongrak Hong
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Publication Detail:
Type:  Journal Article     Date:  2010-03-03
Journal Detail:
Title:  Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons     Volume:  68     ISSN:  1531-5053     ISO Abbreviation:  J. Oral Maxillofac. Surg.     Publication Date:  2010 May 
Date Detail:
Created Date:  2010-04-20     Completed Date:  2010-05-04     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8206428     Medline TA:  J Oral Maxillofac Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1106-11     Citation Subset:  AIM; D; IM    
Copyright Information:
Copyright 2010 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.
Department of Orthodontics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea.
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MeSH Terms
Cranial Sutures / pathology
Dental Occlusion
Facial Asymmetry / pathology,  surgery
Follow-Up Studies
Frontal Bone / pathology
Lip / pathology*
Malocclusion / pathology,  surgery
Mandible / surgery*
Maxilla / surgery*
Molar / pathology
Orthognathic Surgical Procedures*
Osteotomy / methods
Osteotomy, Le Fort
Photography, Dental
Vertical Dimension
Young Adult
Zygoma / pathology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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