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Comparative study of nasopharyngeal soft-tissue characteristics in patients with Class III malocclusion.
MedLine Citation:
PMID:  21300254     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
INTRODUCTION: The aims of our study were to assess nasopharyngeal soft-tissue characteristics in white patients with Class III malocclusion and to compare the results with patients with ideal occlusion.
METHODS: A sample of 71 patients with Class III malocclusion was selected from the Dental School at the Complutense University of Madrid. None of the subjects had a history of upper airway disease, adenoidectomy, or pathology in the pharynx. Lateral cephalograms were digitized, and linear and area measures were made to define the airway characteristics. Error analysis was performed to prevent systematic or random errors. Independent means t tests and Pearson correlation analysis were used to evaluate sex differences and the correlations among the variables. A discriminant analysis was also used to identify different groups with excellent occlusion and Class III malocclusion.
RESULTS: Nasopharyngeal soft-tissue characteristics in Class III subjects were different in male and female subjects. Adenoidal tissue and upper airway length were greater in the men. Three groups of variables tended to be related among themselves but not with others. A discriminant analysis showed that changes in cranial base length are directly related to nasopharyngeal morphology in Class III malocclusion. A discriminant equation was also obtained.
CONCLUSIONS: This study suggests new lines of investigation about the relationship between skeletal and dental anomalies and airway obstruction, and possible specific respiratory characteristics for each type of malocclusion.
Authors:
Oscar Martin; Leonor Muelas; Maria José Viñas
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics     Volume:  139     ISSN:  1097-6752     ISO Abbreviation:  Am J Orthod Dentofacial Orthop     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-02-08     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8610224     Medline TA:  Am J Orthod Dentofacial Orthop     Country:  United States    
Other Details:
Languages:  eng     Pagination:  242-51     Citation Subset:  D; IM    
Copyright Information:
Copyright © 2011 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved.
Affiliation:
Assistant professor, Department of Orthodontics, Universidad Complutense, Madrid, Spain.
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