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KJO Korean Journal of Orthodontics

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pISSN 2234-7518
eISSN 2005-372X

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Korean J Orthod   

First Published Date February 21, 2023

Copyright © The Korean Association of Orthodontists.

Three-dimensional evaluation of the mandibular condyle in adults with various skeletal patterns

Ahmed Maher Mohsena,b, Junjie Yea,b, Akram Al-Nasria,b, Catherine Chua,b, Wei-Bing Zhanga,b,c,d, Lin-Wanga,b

aJiangsu Key Laboratory of Oral Disease, Nanjing Medical University, Nanjing, China
bDepartment of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
cDepartment of Stomatology, Dushu Lake Hospital Affiliated to Soochow University, Suzhou, China
dDepartment of Stomatology, Medical Center of Soochow University, Suzhou, China

Correspondence to:Wei-Bing Zhang.
Professor, Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, 136 Han-Zhong Road, Nanjing 210029, China.

Tel +86-025-69593061 e-mail wbzhang@suda.edu.cn

Ahmed Maher Mohsen and Junjie Ye contributed equally to this work (as co-first authors).

How to cite this article: Mohsen AM, Ye J, Al-Nasri A, Chu C, Zhang WB, Lin-Wang. Three-dimensional evaluation of the mandibular condyle in adults with various skeletal patterns. Korean J Orthod. Published online February 21, 2023. https://doi.org/10.4041/kjod22.076

Received: April 6, 2022; Revised: September 28, 2022; Accepted: October 25, 2022

Abstract

Objective: Morphometric and morphological evaluation of the mandibular condyle in adults and to identify its correlation with skeletal malocclusion patterns. Methods: Cone-beam computed tomography scans of 135 adult patients were used in this study and classified into groups according to four criteria: (1) sex (male and female); (2) sagittal skeletal discrepancy (Class I, Class II, and Class III); (3) vertical skeletal discrepancy (hyperdivergent, normodivergent, and hypodivergent); and age (group 1 ≤ 20 years, 21 ≤ group 2 < 30, and group 3 ≥ 30 years). The morphometrical variables were mandibular condyle height and width, and the morphological variable was the mandibular condyle shape in coronal and sagittal sections. Three-dimensional standard tessellation language files were created using itk-snap (open-source software), and measurements were performed using Meshmixer (open-source software). Results: The mandibular condyle height was significantly greater (p < 0.05) in patients with class III malocclusion than in those with class I or II malocclusion; the mandibular condyle width was not significantly different among different sexes, age groups, and sagittal and vertical malocclusions. There were no statistical associations between various mandibular condyle shapes and the sexes, age groups, and skeletal malocclusions. Conclusions: The condylar height was greatest in patients with class III malocclusion. The condylar height and width were greater among males than in females. The mandibular condyle shapes observed in sagittal and coronal sections did not affect the skeletal malocclusion patterns.

Keywords: Growth and development, Temporomandibular joint, Class III malocclusion, Three-dimensional cephalometrics

Article

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Korean J Orthod   

First Published Date February 21, 2023

Copyright © The Korean Association of Orthodontists.

Three-dimensional evaluation of the mandibular condyle in adults with various skeletal patterns

Ahmed Maher Mohsena,b, Junjie Yea,b, Akram Al-Nasria,b, Catherine Chua,b, Wei-Bing Zhanga,b,c,d, Lin-Wanga,b

aJiangsu Key Laboratory of Oral Disease, Nanjing Medical University, Nanjing, China
bDepartment of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China
cDepartment of Stomatology, Dushu Lake Hospital Affiliated to Soochow University, Suzhou, China
dDepartment of Stomatology, Medical Center of Soochow University, Suzhou, China

Correspondence to:Wei-Bing Zhang.
Professor, Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, 136 Han-Zhong Road, Nanjing 210029, China.

Tel +86-025-69593061 e-mail wbzhang@suda.edu.cn

Ahmed Maher Mohsen and Junjie Ye contributed equally to this work (as co-first authors).

How to cite this article: Mohsen AM, Ye J, Al-Nasri A, Chu C, Zhang WB, Lin-Wang. Three-dimensional evaluation of the mandibular condyle in adults with various skeletal patterns. Korean J Orthod. Published online February 21, 2023. https://doi.org/10.4041/kjod22.076

Received: April 6, 2022; Revised: September 28, 2022; Accepted: October 25, 2022

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objective: Morphometric and morphological evaluation of the mandibular condyle in adults and to identify its correlation with skeletal malocclusion patterns. Methods: Cone-beam computed tomography scans of 135 adult patients were used in this study and classified into groups according to four criteria: (1) sex (male and female); (2) sagittal skeletal discrepancy (Class I, Class II, and Class III); (3) vertical skeletal discrepancy (hyperdivergent, normodivergent, and hypodivergent); and age (group 1 ≤ 20 years, 21 ≤ group 2 < 30, and group 3 ≥ 30 years). The morphometrical variables were mandibular condyle height and width, and the morphological variable was the mandibular condyle shape in coronal and sagittal sections. Three-dimensional standard tessellation language files were created using itk-snap (open-source software), and measurements were performed using Meshmixer (open-source software). Results: The mandibular condyle height was significantly greater (p < 0.05) in patients with class III malocclusion than in those with class I or II malocclusion; the mandibular condyle width was not significantly different among different sexes, age groups, and sagittal and vertical malocclusions. There were no statistical associations between various mandibular condyle shapes and the sexes, age groups, and skeletal malocclusions. Conclusions: The condylar height was greatest in patients with class III malocclusion. The condylar height and width were greater among males than in females. The mandibular condyle shapes observed in sagittal and coronal sections did not affect the skeletal malocclusion patterns.

Keywords: Growth and development, Temporomandibular joint, Class III malocclusion, Three-dimensional cephalometrics