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Comparison of condylar displacement between three biotypological facial groups by using mounted models and a mandibular position indicator
OBJECTIVE: Facial-type-associated variations in diagnostic features have several implications in orthodontics. For example, in hyperdivergent craniofacial types, growth imbalances are compensated by displacement of the condyle. When diagnosis and treatment planning involves centric relation (CR), de...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Korean Association of Orthodontists
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4250665/ https://www.ncbi.nlm.nih.gov/pubmed/25473647 http://dx.doi.org/10.4041/kjod.2014.44.6.312 |
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author | Ponces, Maria João Tavares, José Pedro Lopes, Jorge Dias Ferreira, Afonso Pinhão |
author_facet | Ponces, Maria João Tavares, José Pedro Lopes, Jorge Dias Ferreira, Afonso Pinhão |
author_sort | Ponces, Maria João |
collection | PubMed |
description | OBJECTIVE: Facial-type-associated variations in diagnostic features have several implications in orthodontics. For example, in hyperdivergent craniofacial types, growth imbalances are compensated by displacement of the condyle. When diagnosis and treatment planning involves centric relation (CR), detailed knowledge of the condylar position is desirable. The present study aimed to measure condylar displacement (CD) between CR and maximum intercuspation in three facial types of an asymptomatic orthodontic population. METHODS: The study was conducted in 108 patients classified into three groups of 36 individuals each (27 women and 9 men; mean age, 20.5 years), based on the following facial patterns: hyperdivergent, hypodivergent, and intermediate. To quantify CD along the horizontal and vertical axes, the condylar position was analyzed using mounted casts on a semi-adjustable articulator and a mandibular position indicator. The Student t-test was used to compare CD between the groups. RESULTS: Vertical displacement was found to be significantly different between the hyperdivergent and hypodivergent groups (p < 0.0002) and between the hyperdivergent and intermediate groups (p < 0.0006). The differences in horizontal displacement were not significant between the groups. In each group, vertical CD was more evident than horizontal displacement was. CONCLUSIONS: All facial types, especially the hyperdivergent type, carried a significantly high risk of CD. Therefore, the possibility of CD should be carefully evaluated and considered in the assessment of all orthodontic cases in order to accurately assess jaw relationships and avoid possible misdiagnosis. |
format | Online Article Text |
id | pubmed-4250665 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Korean Association of Orthodontists |
record_format | MEDLINE/PubMed |
spelling | pubmed-42506652014-12-03 Comparison of condylar displacement between three biotypological facial groups by using mounted models and a mandibular position indicator Ponces, Maria João Tavares, José Pedro Lopes, Jorge Dias Ferreira, Afonso Pinhão Korean J Orthod Original Article OBJECTIVE: Facial-type-associated variations in diagnostic features have several implications in orthodontics. For example, in hyperdivergent craniofacial types, growth imbalances are compensated by displacement of the condyle. When diagnosis and treatment planning involves centric relation (CR), detailed knowledge of the condylar position is desirable. The present study aimed to measure condylar displacement (CD) between CR and maximum intercuspation in three facial types of an asymptomatic orthodontic population. METHODS: The study was conducted in 108 patients classified into three groups of 36 individuals each (27 women and 9 men; mean age, 20.5 years), based on the following facial patterns: hyperdivergent, hypodivergent, and intermediate. To quantify CD along the horizontal and vertical axes, the condylar position was analyzed using mounted casts on a semi-adjustable articulator and a mandibular position indicator. The Student t-test was used to compare CD between the groups. RESULTS: Vertical displacement was found to be significantly different between the hyperdivergent and hypodivergent groups (p < 0.0002) and between the hyperdivergent and intermediate groups (p < 0.0006). The differences in horizontal displacement were not significant between the groups. In each group, vertical CD was more evident than horizontal displacement was. CONCLUSIONS: All facial types, especially the hyperdivergent type, carried a significantly high risk of CD. Therefore, the possibility of CD should be carefully evaluated and considered in the assessment of all orthodontic cases in order to accurately assess jaw relationships and avoid possible misdiagnosis. Korean Association of Orthodontists 2014-11 2014-11-24 /pmc/articles/PMC4250665/ /pubmed/25473647 http://dx.doi.org/10.4041/kjod.2014.44.6.312 Text en © 2014 The Korean Association of Orthodontists. http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Ponces, Maria João Tavares, José Pedro Lopes, Jorge Dias Ferreira, Afonso Pinhão Comparison of condylar displacement between three biotypological facial groups by using mounted models and a mandibular position indicator |
title | Comparison of condylar displacement between three biotypological facial groups by using mounted models and a mandibular position indicator |
title_full | Comparison of condylar displacement between three biotypological facial groups by using mounted models and a mandibular position indicator |
title_fullStr | Comparison of condylar displacement between three biotypological facial groups by using mounted models and a mandibular position indicator |
title_full_unstemmed | Comparison of condylar displacement between three biotypological facial groups by using mounted models and a mandibular position indicator |
title_short | Comparison of condylar displacement between three biotypological facial groups by using mounted models and a mandibular position indicator |
title_sort | comparison of condylar displacement between three biotypological facial groups by using mounted models and a mandibular position indicator |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4250665/ https://www.ncbi.nlm.nih.gov/pubmed/25473647 http://dx.doi.org/10.4041/kjod.2014.44.6.312 |
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