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Permanent link (DOI): https://doi.org/10.7939/R3VM4378K

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Comparison of short-term skeletal and dental outcomes in Class II malocclusions treated by a combination of either Xbow or Twin-Block appliances with orthodontic brackets Open Access

Descriptions

Other title
Subject/Keyword
Xbow
Functional appliances
Class II malocclusion
Twin-Block
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Ehsani, Sayeh
Supervisor and department
Flores-Mir, Carlos (Dentistry-Orthodontics)
Examining committee member and department
Lagravere, Manuel (Dentistry-Orthodontics)
Flores-Mir, Carlos (Dentistry-Orthodontics)
Nebbe, Brian (Private practice)
Normando, David (Federal University of Para)
Department
Medical Sciences-Orthodontics
Specialization

Date accepted
2013-08-15T08:51:12Z
Graduation date
2013-11
Degree
Master of Science
Degree level
Master's
Abstract
The objective of this study was to compare short-term treatment effects of a two-phase orthodontic treatment consisting of a phase 1 with either a Twin-block or a Xbow appliance and a phase 2 with orthodontic brackets. Before and after treatment lateral head-films of 50 consecutively treated Class II patients were analyzed. Dimensions and sagittal relationship of maxilla and mandible, lower anterior face height, mesio-distal movement of first molars and inclination of incisors were evaluated. To factor out growth, a control group consisting of untreated individuals with Class II malocclusion obtained from Burlington Growth Center at University of Toronto was used. Class II correction by Xbow and Twin-block occurs through a combination of dental and skeletal effects. The two appliances have similar overall treatment effects with some identified differences between them like restraint of maxillary growth, mesial movement of lower molars, restricted forward movement of upper molars and no vertical changes.
Language
English
DOI
doi:10.7939/R3VM4378K
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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