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Three-dimensional cone beam computed tomography analysis of temporomandibular joint response to the Twin-block functional appliance
OBJECTIVE: To propose a three-dimensional (3D) method for evaluating temporomandibular joint (TMJ) changes during Twin-block treatment. METHODS: Seventeen patients with Class II division 1 malocclusion treated using Twin-block and nine untreated patients with a similar malocclusion were included in...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Korean Association of Orthodontists
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7093662/ https://www.ncbi.nlm.nih.gov/pubmed/32257934 http://dx.doi.org/10.4041/kjod.2020.50.2.86 |
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author | Jiang, Yuan-yuan Sun, Lian Wang, Hua Zhao, Chun-yang Zhang, Wei-Bing |
author_facet | Jiang, Yuan-yuan Sun, Lian Wang, Hua Zhao, Chun-yang Zhang, Wei-Bing |
author_sort | Jiang, Yuan-yuan |
collection | PubMed |
description | OBJECTIVE: To propose a three-dimensional (3D) method for evaluating temporomandibular joint (TMJ) changes during Twin-block treatment. METHODS: Seventeen patients with Class II division 1 malocclusion treated using Twin-block and nine untreated patients with a similar malocclusion were included in this research. We collected their cone beam computed tomography (CBCT) data from before and 8 months after treatment. Segmentations were constructed using ITK-SNAP. Condylar volume and superficial area were measured using 3D Slicer. The 3D landmarks were identified on CBCT images by using Dolphin software to assess the condylar positional relationship. 3D models of the mandible and glenoid fossa of the patients were constructed and registered via voxel-based superimposition using 3D Slicer. Thereafter, skeletal changes could be visualized using 3DMeshMetric in any direction of the superimposition on a color-coded map. All the superimpositions were measured using the same scale on the distance color-coded map, in which red color represents overgrowth and blue color represents resorption. RESULTS: Significant differences were observed in condylar volume, superficial area, and condylar position in both groups after 8 months. Compared with the control group (CG), the Twin-block group exhibited more obvious condyle-fossa modifications and joint positional changes. Moreover, on the color-coded map, more obvious condyle-fossa modifications could be observed in the posterior and superior directions in the Twin-block group than in the CG. CONCLUSIONS: We successfully established a 3D method for measuring and evaluating TMJ changes caused by Twin-block treatment. The treatment produced a larger condylar size and caused condylar positional changes. |
format | Online Article Text |
id | pubmed-7093662 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Korean Association of Orthodontists |
record_format | MEDLINE/PubMed |
spelling | pubmed-70936622020-04-02 Three-dimensional cone beam computed tomography analysis of temporomandibular joint response to the Twin-block functional appliance Jiang, Yuan-yuan Sun, Lian Wang, Hua Zhao, Chun-yang Zhang, Wei-Bing Korean J Orthod Original Article OBJECTIVE: To propose a three-dimensional (3D) method for evaluating temporomandibular joint (TMJ) changes during Twin-block treatment. METHODS: Seventeen patients with Class II division 1 malocclusion treated using Twin-block and nine untreated patients with a similar malocclusion were included in this research. We collected their cone beam computed tomography (CBCT) data from before and 8 months after treatment. Segmentations were constructed using ITK-SNAP. Condylar volume and superficial area were measured using 3D Slicer. The 3D landmarks were identified on CBCT images by using Dolphin software to assess the condylar positional relationship. 3D models of the mandible and glenoid fossa of the patients were constructed and registered via voxel-based superimposition using 3D Slicer. Thereafter, skeletal changes could be visualized using 3DMeshMetric in any direction of the superimposition on a color-coded map. All the superimpositions were measured using the same scale on the distance color-coded map, in which red color represents overgrowth and blue color represents resorption. RESULTS: Significant differences were observed in condylar volume, superficial area, and condylar position in both groups after 8 months. Compared with the control group (CG), the Twin-block group exhibited more obvious condyle-fossa modifications and joint positional changes. Moreover, on the color-coded map, more obvious condyle-fossa modifications could be observed in the posterior and superior directions in the Twin-block group than in the CG. CONCLUSIONS: We successfully established a 3D method for measuring and evaluating TMJ changes caused by Twin-block treatment. The treatment produced a larger condylar size and caused condylar positional changes. Korean Association of Orthodontists 2020-03 2020-03-24 /pmc/articles/PMC7093662/ /pubmed/32257934 http://dx.doi.org/10.4041/kjod.2020.50.2.86 Text en © 2020 The Korean Association of Orthodontists. http://creativecommons.org/licenses/by-nc/4.0/ 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. |
spellingShingle | Original Article Jiang, Yuan-yuan Sun, Lian Wang, Hua Zhao, Chun-yang Zhang, Wei-Bing Three-dimensional cone beam computed tomography analysis of temporomandibular joint response to the Twin-block functional appliance |
title | Three-dimensional cone beam computed tomography analysis of temporomandibular joint response to the Twin-block functional appliance |
title_full | Three-dimensional cone beam computed tomography analysis of temporomandibular joint response to the Twin-block functional appliance |
title_fullStr | Three-dimensional cone beam computed tomography analysis of temporomandibular joint response to the Twin-block functional appliance |
title_full_unstemmed | Three-dimensional cone beam computed tomography analysis of temporomandibular joint response to the Twin-block functional appliance |
title_short | Three-dimensional cone beam computed tomography analysis of temporomandibular joint response to the Twin-block functional appliance |
title_sort | three-dimensional cone beam computed tomography analysis of temporomandibular joint response to the twin-block functional appliance |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7093662/ https://www.ncbi.nlm.nih.gov/pubmed/32257934 http://dx.doi.org/10.4041/kjod.2020.50.2.86 |
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