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Evaluation of changes in the upper airway after Twin Block treatment in patients with Class II malocclusion

The purpose of this prospective case control study is to describe in growing patients with mandibular hypoplasia, treatment outcomes following functional therapy in terms of volumetric changes in nasopharynx and oropharynx, that is, upper and lower pharynx. We recruited 60 study participants aged be...

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Autores principales: Entrenas, Inmaculada, González‐Chamorro, Elena, Álvarez‐Abad, Covadonga, Muriel, Juan, Menéndez‐Díaz, Iván, Cobo, Teresa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6585589/
https://www.ncbi.nlm.nih.gov/pubmed/31249707
http://dx.doi.org/10.1002/cre2.180
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author Entrenas, Inmaculada
González‐Chamorro, Elena
Álvarez‐Abad, Covadonga
Muriel, Juan
Menéndez‐Díaz, Iván
Cobo, Teresa
author_facet Entrenas, Inmaculada
González‐Chamorro, Elena
Álvarez‐Abad, Covadonga
Muriel, Juan
Menéndez‐Díaz, Iván
Cobo, Teresa
author_sort Entrenas, Inmaculada
collection PubMed
description The purpose of this prospective case control study is to describe in growing patients with mandibular hypoplasia, treatment outcomes following functional therapy in terms of volumetric changes in nasopharynx and oropharynx, that is, upper and lower pharynx. We recruited 60 study participants aged between 8 and 12 years having mandibular Class II malocclusion and a reduced upper airway (UA) size, as determined by McNamara cephalometric analyses. Forty patients received Twin Block treatment, whereas the remaining 20 patients did not receive treatment, thus constituting the control group. The control group included patients who did not start treatment after their first visit but returned for a consultation one or 2 years later. All patients underwent an initial teleradiography examination of the skull and a final teleradiography examination to measure changes using McNamara cephalometric analysis of the UA. Pretreatment and posttreatment changes were assessed using Student's t test for independent samples with a significance level of 0.05. Both anatomical structures analyzed—the upper pharynx (nasopharynx) and lower pharynx (oropharynx)—showed significant increases after treatment regardless of whether the patients were boys or girls. The controls showed a decrease in UA size on average after approximately 2 years of growth. A clear relationship exists between the mandibular advancement achieved with TB treatment and an increased UA size. Therefore, the appliance is considered suitable for improving the respiratory quality of growing patients with a decreased UA size.
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spelling pubmed-65855892019-06-27 Evaluation of changes in the upper airway after Twin Block treatment in patients with Class II malocclusion Entrenas, Inmaculada González‐Chamorro, Elena Álvarez‐Abad, Covadonga Muriel, Juan Menéndez‐Díaz, Iván Cobo, Teresa Clin Exp Dent Res Original Articles The purpose of this prospective case control study is to describe in growing patients with mandibular hypoplasia, treatment outcomes following functional therapy in terms of volumetric changes in nasopharynx and oropharynx, that is, upper and lower pharynx. We recruited 60 study participants aged between 8 and 12 years having mandibular Class II malocclusion and a reduced upper airway (UA) size, as determined by McNamara cephalometric analyses. Forty patients received Twin Block treatment, whereas the remaining 20 patients did not receive treatment, thus constituting the control group. The control group included patients who did not start treatment after their first visit but returned for a consultation one or 2 years later. All patients underwent an initial teleradiography examination of the skull and a final teleradiography examination to measure changes using McNamara cephalometric analysis of the UA. Pretreatment and posttreatment changes were assessed using Student's t test for independent samples with a significance level of 0.05. Both anatomical structures analyzed—the upper pharynx (nasopharynx) and lower pharynx (oropharynx)—showed significant increases after treatment regardless of whether the patients were boys or girls. The controls showed a decrease in UA size on average after approximately 2 years of growth. A clear relationship exists between the mandibular advancement achieved with TB treatment and an increased UA size. Therefore, the appliance is considered suitable for improving the respiratory quality of growing patients with a decreased UA size. John Wiley and Sons Inc. 2019-03-18 /pmc/articles/PMC6585589/ /pubmed/31249707 http://dx.doi.org/10.1002/cre2.180 Text en ©2019 The Authors. Clinical and Experimental Dental Research published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Articles
Entrenas, Inmaculada
González‐Chamorro, Elena
Álvarez‐Abad, Covadonga
Muriel, Juan
Menéndez‐Díaz, Iván
Cobo, Teresa
Evaluation of changes in the upper airway after Twin Block treatment in patients with Class II malocclusion
title Evaluation of changes in the upper airway after Twin Block treatment in patients with Class II malocclusion
title_full Evaluation of changes in the upper airway after Twin Block treatment in patients with Class II malocclusion
title_fullStr Evaluation of changes in the upper airway after Twin Block treatment in patients with Class II malocclusion
title_full_unstemmed Evaluation of changes in the upper airway after Twin Block treatment in patients with Class II malocclusion
title_short Evaluation of changes in the upper airway after Twin Block treatment in patients with Class II malocclusion
title_sort evaluation of changes in the upper airway after twin block treatment in patients with class ii malocclusion
topic Original Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6585589/
https://www.ncbi.nlm.nih.gov/pubmed/31249707
http://dx.doi.org/10.1002/cre2.180
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