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Changes in the Gonial Angle Following Bilateral Sagittal Split Osteotomy and Vertical Ramus Osteotomy for Mandibular Excess

Aim: The gonial angle plays an important role in ensuring a harmonious facial profile. Changes in this angle after surgery may be an esthetic concern for both the patient and the surgeon. The aim of the present study was to evaluate gonial angle changes after mandibular setback by the bilateral sagi...

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Autores principales: Yazdani, Javad, Talesh, Kourosh Taheri, Motamedi, Mohammad Hosein Kalantar, Ghavimi, Mohammad Ali
Formato: Texto
Lenguaje:English
Publicado: Open Science Company, LLC 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2829198/
https://www.ncbi.nlm.nih.gov/pubmed/20204060
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author Yazdani, Javad
Talesh, Kourosh Taheri
Motamedi, Mohammad Hosein Kalantar
Ghavimi, Mohammad Ali
author_facet Yazdani, Javad
Talesh, Kourosh Taheri
Motamedi, Mohammad Hosein Kalantar
Ghavimi, Mohammad Ali
author_sort Yazdani, Javad
collection PubMed
description Aim: The gonial angle plays an important role in ensuring a harmonious facial profile. Changes in this angle after surgery may be an esthetic concern for both the patient and the surgeon. The aim of the present study was to evaluate gonial angle changes after mandibular setback by the bilateral sagittal split osteotomy (BSSO) and vertical ramus osteotomy (VRO) techniques. Methods: Fifty-eight male patients with mandibular prognathism only were treated from 2004 to 2006 (deformities such as discrepancy of jaws, mandibular setback of more than 10 mm, asymmetry, and vertical discrepancy were excluded). Patients were randomly divided into 2 groups. In the first group, mandibular setback was performed using the Obwegeser technique and wire osteosynthesis with 4 weeks' fixation (IMF), and in the second group, mandibular setback via VRO without wire osteosynthesis and 4 weeks' IMF was carried out. Lateral cephalograms were obtained for all the patients before surgery (T(0)) and 1 year after surgery (T(1)). Gonial angle and occlusal plane-SN in T(0) and T(1) were evaluated. Results: After surgery, the gonial angle had decreased in all patients. Decrease in the gonial angle in the VRO group was greater than the BSSO group. The average decrease in the gonial angle was significantly more (P < 0.05) in the VRO group (7°) than in the BSSO group (2°). Conclusion: Gonial angle decrease was observed in the present study following mandibular setback by the VRO and BSSO techniques. This decrease in the VRO group was significantly greater.
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spelling pubmed-28291982010-03-04 Changes in the Gonial Angle Following Bilateral Sagittal Split Osteotomy and Vertical Ramus Osteotomy for Mandibular Excess Yazdani, Javad Talesh, Kourosh Taheri Motamedi, Mohammad Hosein Kalantar Ghavimi, Mohammad Ali Eplasty Journal Article Aim: The gonial angle plays an important role in ensuring a harmonious facial profile. Changes in this angle after surgery may be an esthetic concern for both the patient and the surgeon. The aim of the present study was to evaluate gonial angle changes after mandibular setback by the bilateral sagittal split osteotomy (BSSO) and vertical ramus osteotomy (VRO) techniques. Methods: Fifty-eight male patients with mandibular prognathism only were treated from 2004 to 2006 (deformities such as discrepancy of jaws, mandibular setback of more than 10 mm, asymmetry, and vertical discrepancy were excluded). Patients were randomly divided into 2 groups. In the first group, mandibular setback was performed using the Obwegeser technique and wire osteosynthesis with 4 weeks' fixation (IMF), and in the second group, mandibular setback via VRO without wire osteosynthesis and 4 weeks' IMF was carried out. Lateral cephalograms were obtained for all the patients before surgery (T(0)) and 1 year after surgery (T(1)). Gonial angle and occlusal plane-SN in T(0) and T(1) were evaluated. Results: After surgery, the gonial angle had decreased in all patients. Decrease in the gonial angle in the VRO group was greater than the BSSO group. The average decrease in the gonial angle was significantly more (P < 0.05) in the VRO group (7°) than in the BSSO group (2°). Conclusion: Gonial angle decrease was observed in the present study following mandibular setback by the VRO and BSSO techniques. This decrease in the VRO group was significantly greater. Open Science Company, LLC 2010-02-23 /pmc/articles/PMC2829198/ /pubmed/20204060 Text en Copyright © 2010 The Author(s) http://creativecommons.org/licenses/by/2.0/ This is an open-access article whereby the authors retain copyright of the work. The article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Journal Article
Yazdani, Javad
Talesh, Kourosh Taheri
Motamedi, Mohammad Hosein Kalantar
Ghavimi, Mohammad Ali
Changes in the Gonial Angle Following Bilateral Sagittal Split Osteotomy and Vertical Ramus Osteotomy for Mandibular Excess
title Changes in the Gonial Angle Following Bilateral Sagittal Split Osteotomy and Vertical Ramus Osteotomy for Mandibular Excess
title_full Changes in the Gonial Angle Following Bilateral Sagittal Split Osteotomy and Vertical Ramus Osteotomy for Mandibular Excess
title_fullStr Changes in the Gonial Angle Following Bilateral Sagittal Split Osteotomy and Vertical Ramus Osteotomy for Mandibular Excess
title_full_unstemmed Changes in the Gonial Angle Following Bilateral Sagittal Split Osteotomy and Vertical Ramus Osteotomy for Mandibular Excess
title_short Changes in the Gonial Angle Following Bilateral Sagittal Split Osteotomy and Vertical Ramus Osteotomy for Mandibular Excess
title_sort changes in the gonial angle following bilateral sagittal split osteotomy and vertical ramus osteotomy for mandibular excess
topic Journal Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2829198/
https://www.ncbi.nlm.nih.gov/pubmed/20204060
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