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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/45669/1/Poster_Template_Malsec_IADR3_final_%282%29.pdf
http://irep.iium.edu.my/45669/4/45669_abstract.pdf
http://irep.iium.edu.my/45669/
http://www.malseciadr.com/wp-content/uploads/2015/04/Abstracts-poster.pdf
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spelling my.iium.irep.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 REM 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
institution Universiti Islam Antarabangsa Malaysia
building IIUM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider International Islamic University Malaysia
content_source IIUM Repository (IREP)
url_provider http://irep.iium.edu.my/
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/45669/1/Poster_Template_Malsec_IADR3_final_%282%29.pdf
http://irep.iium.edu.my/45669/4/45669_abstract.pdf
http://irep.iium.edu.my/45669/
http://www.malseciadr.com/wp-content/uploads/2015/04/Abstracts-poster.pdf
_version_ 1643612831781748736
score 13.211869

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