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Three-dimensional assessment of facial asymmetry in Class III subjects. Part 1: a retrospective study evaluating postsurgical outcomes

OBJECTIVE: The present study aimed to determine the site and severity of maxillomandibular asymmetry before and after orthognathic surgery in asymmetric patients. MATERIALS AND METHODS: Presurgery and postsurgery cone beam computed tomography (CBCT) data of 21 facial asymmetry patients (7 males and...

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Autores principales: Ajmera, Deepal Haresh, Hsung, Richard Tai-Chiu, Singh, Pradeep, Wong, Natalie Sui Miu, Yeung, Andy Wai Kan, Lam, Walter Yu Hang, Khambay, Balvinder S., Leung, Yiu Yan, Gu, Min
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9276556/
https://www.ncbi.nlm.nih.gov/pubmed/35320382
http://dx.doi.org/10.1007/s00784-022-04463-4
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author Ajmera, Deepal Haresh
Hsung, Richard Tai-Chiu
Singh, Pradeep
Wong, Natalie Sui Miu
Yeung, Andy Wai Kan
Lam, Walter Yu Hang
Khambay, Balvinder S.
Leung, Yiu Yan
Gu, Min
author_facet Ajmera, Deepal Haresh
Hsung, Richard Tai-Chiu
Singh, Pradeep
Wong, Natalie Sui Miu
Yeung, Andy Wai Kan
Lam, Walter Yu Hang
Khambay, Balvinder S.
Leung, Yiu Yan
Gu, Min
author_sort Ajmera, Deepal Haresh
collection PubMed
description OBJECTIVE: The present study aimed to determine the site and severity of maxillomandibular asymmetry before and after orthognathic surgery in asymmetric patients. MATERIALS AND METHODS: Presurgery and postsurgery cone beam computed tomography (CBCT) data of 21 facial asymmetry patients (7 males and 14 females, mean age: 23.0 ± 3.36 years) with soft tissue chin deviation ≥ 3 mm who had undergone bimaxillary surgery were evaluated. Seven midline and twenty bilateral hard tissue landmarks were identified for the evaluation of facial asymmetry and outcomes were assessed against age- and gender-matched control subjects. RESULTS: In the asymmetry group, bilateral landmarks exhibited significant deviation in the mandible and midface regions. Before surgery, asymmetry was more severe at the mandibular midline and sites close to it, in the asymmetry group. Bimaxillary surgery proved to be highly effective, with a significant correction of the menton to a clinically normal value (2.90 mm, p < 0.001). After surgery, significant residual asymmetry was observed at the mental foramen (p = 0.001) in the R-L direction. Moreover, significant asymmetry persisted at the sigmoid notch (p = 0.001) in the S-I direction. CONCLUSIONS: Mandibular midline landmarks and chin peripheral regions contribute significantly to overall facial asymmetry characteristics. Despite significant correction after bimaxillary surgery, asymmetry persisted at several sites, thereby requiring secondary correction. Comprehensive 3D presurgical planning is central for asymmetry correction in a single surgery. CLINICAL RELEVANCE: The present study specifies the location of residual asymmetry sites and advocates the correction of those sites during initial surgery.
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spelling pubmed-92765562022-07-14 Three-dimensional assessment of facial asymmetry in Class III subjects. Part 1: a retrospective study evaluating postsurgical outcomes Ajmera, Deepal Haresh Hsung, Richard Tai-Chiu Singh, Pradeep Wong, Natalie Sui Miu Yeung, Andy Wai Kan Lam, Walter Yu Hang Khambay, Balvinder S. Leung, Yiu Yan Gu, Min Clin Oral Investig Original Article OBJECTIVE: The present study aimed to determine the site and severity of maxillomandibular asymmetry before and after orthognathic surgery in asymmetric patients. MATERIALS AND METHODS: Presurgery and postsurgery cone beam computed tomography (CBCT) data of 21 facial asymmetry patients (7 males and 14 females, mean age: 23.0 ± 3.36 years) with soft tissue chin deviation ≥ 3 mm who had undergone bimaxillary surgery were evaluated. Seven midline and twenty bilateral hard tissue landmarks were identified for the evaluation of facial asymmetry and outcomes were assessed against age- and gender-matched control subjects. RESULTS: In the asymmetry group, bilateral landmarks exhibited significant deviation in the mandible and midface regions. Before surgery, asymmetry was more severe at the mandibular midline and sites close to it, in the asymmetry group. Bimaxillary surgery proved to be highly effective, with a significant correction of the menton to a clinically normal value (2.90 mm, p < 0.001). After surgery, significant residual asymmetry was observed at the mental foramen (p = 0.001) in the R-L direction. Moreover, significant asymmetry persisted at the sigmoid notch (p = 0.001) in the S-I direction. CONCLUSIONS: Mandibular midline landmarks and chin peripheral regions contribute significantly to overall facial asymmetry characteristics. Despite significant correction after bimaxillary surgery, asymmetry persisted at several sites, thereby requiring secondary correction. Comprehensive 3D presurgical planning is central for asymmetry correction in a single surgery. CLINICAL RELEVANCE: The present study specifies the location of residual asymmetry sites and advocates the correction of those sites during initial surgery. Springer Berlin Heidelberg 2022-03-23 2022 /pmc/articles/PMC9276556/ /pubmed/35320382 http://dx.doi.org/10.1007/s00784-022-04463-4 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Original Article
Ajmera, Deepal Haresh
Hsung, Richard Tai-Chiu
Singh, Pradeep
Wong, Natalie Sui Miu
Yeung, Andy Wai Kan
Lam, Walter Yu Hang
Khambay, Balvinder S.
Leung, Yiu Yan
Gu, Min
Three-dimensional assessment of facial asymmetry in Class III subjects. Part 1: a retrospective study evaluating postsurgical outcomes
title Three-dimensional assessment of facial asymmetry in Class III subjects. Part 1: a retrospective study evaluating postsurgical outcomes
title_full Three-dimensional assessment of facial asymmetry in Class III subjects. Part 1: a retrospective study evaluating postsurgical outcomes
title_fullStr Three-dimensional assessment of facial asymmetry in Class III subjects. Part 1: a retrospective study evaluating postsurgical outcomes
title_full_unstemmed Three-dimensional assessment of facial asymmetry in Class III subjects. Part 1: a retrospective study evaluating postsurgical outcomes
title_short Three-dimensional assessment of facial asymmetry in Class III subjects. Part 1: a retrospective study evaluating postsurgical outcomes
title_sort three-dimensional assessment of facial asymmetry in class iii subjects. part 1: a retrospective study evaluating postsurgical outcomes
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9276556/
https://www.ncbi.nlm.nih.gov/pubmed/35320382
http://dx.doi.org/10.1007/s00784-022-04463-4
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