Radiographic condylar changes following vertical subsigmoid osteotomy in different setback magnitudes

Objectives: The objective of this retrospective study was to compare the effect of different mandibular setback amount by vertical subsigmoid osteotomy (VSSO) on the pattern of radiographic condylar remodelling in 1 year time span post-surgically. Methods: 200 patients diagnosed of mandibular progn...

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Main Authors:	Subramaniam, Pram Kumar, Wing Shan, Winnie Choi
Format:	Conference or Workshop Item
Language:	English English
Published:	2015
Subjects:	RD701 Orthopedics RK Dentistry
Online Access:	http://irep.iium.edu.my/45669/ http://irep.iium.edu.my/45669/ http://irep.iium.edu.my/45669/1/Poster_Template_Malsec_IADR3_final_%282%29.pdf http://irep.iium.edu.my/45669/4/45669_abstract.pdf

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recordtype	eprints
spelling	iium-456692017-08-18T02:16:26Z http://irep.iium.edu.my/45669/ Radiographic condylar changes following vertical subsigmoid osteotomy in different setback magnitudes Subramaniam, Pram Kumar Wing Shan, Winnie Choi RD701 Orthopedics RK Dentistry Objectives: The objective of this retrospective study was to compare the effect of different mandibular setback amount by vertical subsigmoid osteotomy (VSSO) on the pattern of radiographic condylar remodelling in 1 year time span post-surgically. Methods: 200 patients diagnosed of mandibular prognathism and underwent VSSO surgery with various setback amounts from 2007 until 2012 at the Prince Philip Dental Hospital were included in this study. Presurgical and 1 year post surgical Postero-Anterior Cephalograms, Lateral Cephalograms and Cone Beam Computed Tomography (CBCT) Scans were retrieved. Tracings of plain cephalometric radiographs were performed. CBCT data sets were used to measure the linear and condylar axis angle value in multiplanar view. Finally the pre and postsurgical 3D condyle-ramus units were superimposed using stable registration point of the condylar neck and ramal area above the lingula to assess the condylar bone remodeling by topographic and multiplanar slide views. Results: Plain radiographic tracing shows significant differences in the changes of ramus inclination angle, intergonial width and total ramus angle between postoperative (T2) and preoperative (T1) phase between the setback groups. Changes in the CBCT multiplanar condylar axis angle as well as condylar head linear measurements between T2 to T1 were not significantly different between the setback groups. Superimposed multiplanar view analysis in the coronal and sagittal planes showd no significant relationship between the remodeling changes and the setback magnitude. However there was higher proportion of positive remodeling following higher setback amount at the anteromedial and posteromedial zone in the axial plane. Conclusion: Condyle remodeling is noted to be positive and not destructive following VSSO. The positive remodeling effect remains stable regardless of the amount VSSO setback. 2015-04-18 Conference or Workshop Item NonPeerReviewed application/pdf en http://irep.iium.edu.my/45669/1/Poster_Template_Malsec_IADR3_final_%282%29.pdf application/pdf en http://irep.iium.edu.my/45669/4/45669_abstract.pdf Subramaniam, Pram Kumar and Wing Shan, Winnie Choi (2015) Radiographic condylar changes following vertical subsigmoid osteotomy in different setback magnitudes. In: 14th Annual Scientific Meeting & 16th AGM of Malaysian Section (IADR) International Association for Dental Research, 18th April 2015, Kuala Lumpur. (Unpublished) http://www.malseciadr.com/wp-content/uploads/2015/04/Abstracts-poster.pdf
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	RD701 Orthopedics RK Dentistry
spellingShingle	RD701 Orthopedics RK Dentistry Subramaniam, Pram Kumar Wing Shan, Winnie Choi Radiographic condylar changes following vertical subsigmoid osteotomy in different setback magnitudes
description	Objectives: The objective of this retrospective study was to compare the effect of different mandibular setback amount by vertical subsigmoid osteotomy (VSSO) on the pattern of radiographic condylar remodelling in 1 year time span post-surgically. Methods: 200 patients diagnosed of mandibular prognathism and underwent VSSO surgery with various setback amounts from 2007 until 2012 at the Prince Philip Dental Hospital were included in this study. Presurgical and 1 year post surgical Postero-Anterior Cephalograms, Lateral Cephalograms and Cone Beam Computed Tomography (CBCT) Scans were retrieved. Tracings of plain cephalometric radiographs were performed. CBCT data sets were used to measure the linear and condylar axis angle value in multiplanar view. Finally the pre and postsurgical 3D condyle-ramus units were superimposed using stable registration point of the condylar neck and ramal area above the lingula to assess the condylar bone remodeling by topographic and multiplanar slide views. Results: Plain radiographic tracing shows significant differences in the changes of ramus inclination angle, intergonial width and total ramus angle between postoperative (T2) and preoperative (T1) phase between the setback groups. Changes in the CBCT multiplanar condylar axis angle as well as condylar head linear measurements between T2 to T1 were not significantly different between the setback groups. Superimposed multiplanar view analysis in the coronal and sagittal planes showd no significant relationship between the remodeling changes and the setback magnitude. However there was higher proportion of positive remodeling following higher setback amount at the anteromedial and posteromedial zone in the axial plane. Conclusion: Condyle remodeling is noted to be positive and not destructive following VSSO. The positive remodeling effect remains stable regardless of the amount VSSO setback.
format	Conference or Workshop Item
author	Subramaniam, Pram Kumar Wing Shan, Winnie Choi
author_facet	Subramaniam, Pram Kumar Wing Shan, Winnie Choi
author_sort	Subramaniam, Pram Kumar
title	Radiographic condylar changes following vertical subsigmoid osteotomy in different setback magnitudes
title_short	Radiographic condylar changes following vertical subsigmoid osteotomy in different setback magnitudes
title_full	Radiographic condylar changes following vertical subsigmoid osteotomy in different setback magnitudes
title_fullStr	Radiographic condylar changes following vertical subsigmoid osteotomy in different setback magnitudes
title_full_unstemmed	Radiographic condylar changes following vertical subsigmoid osteotomy in different setback magnitudes
title_sort	radiographic condylar changes following vertical subsigmoid osteotomy in different setback magnitudes
publishDate	2015
url	http://irep.iium.edu.my/45669/ http://irep.iium.edu.my/45669/ http://irep.iium.edu.my/45669/1/Poster_Template_Malsec_IADR3_final_%282%29.pdf http://irep.iium.edu.my/45669/4/45669_abstract.pdf
first_indexed	2023-09-18T21:04:59Z
last_indexed	2023-09-18T21:04:59Z
_version_	1777410873095094272

Radiographic condylar changes following vertical subsigmoid osteotomy in different setback magnitudes

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