ERA

Download the full-sized PDF of Torque expression and bracket deformation of the Orthos and OrthosTi orthodontic bracketDownload the full-sized PDF

Analytics

Share

Permanent link (DOI): https://doi.org/10.7939/R37G7H

Download

Export to: EndNote  |  Zotero  |  Mendeley

Communities

This file is in the following communities:

Graduate Studies and Research, Faculty of

Collections

This file is in the following collections:

Theses and Dissertations

Torque expression and bracket deformation of the Orthos and OrthosTi orthodontic bracket Open Access

Descriptions

Other title
Subject/Keyword
Bracket
Orthos
Deformation
Torque
Orthodontic
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Lacoursiere, Ryan A.
Supervisor and department
Dr. Giseon Heo (Dentistry)
Dr. Paul W. Major (Dentistry)
Dr. David Nobes (Mechanical Engineering)
Dr. Jason Carey (Mechanical Engineering)
Examining committee member and department
Dr. Paul W. Major (Dentistry)
Dr. Giseon Heo (Dentistry)
Dr. Jason Carey (Mechanical Engineering)
Dr. David Nobes (Mechanical Engineering
Department
Department of Dentistry
Specialization

Date accepted
2010-08-20T17:06:07Z
Graduation date
2010-11
Degree
Master of Science
Degree level
Master's
Abstract
Deformation of the orthodontic bracket upon wire engagement may result in torque dissipation within the bracket rather than transmission to the tooth and its supporting structures. The purpose of this study was: 1) quantify the amount of torque expression and 2) quantify any deformation as a result of such increasing torque expression. Digital image correlation is an accurate means of analyzing an orthodontic bracket's structural response to an applied moment of force created through archwire rotation in vitro. A sample of 30 Orthos and 30 OrthosTi brackets were tested with custom software using a novel application of digital image correlation. OrthosTi brackets produce significantly greater amounts of torque from 48° to 24° returning to a neutral position. Titanium brackets exhibit greater variance in torque expression but less variance in deformation. Orthos stainless steel brackets exhibit significantly greater amounts of bracket slot deformation in comparison to the OrthosTi.
Language
English
DOI
doi:10.7939/R37G7H
Rights
License granted by Ryan Lacoursiere (ryanhemi1@hotmail.com) on 2010-08-18T21:34:35Z (GMT): 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 the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein 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.
Citation for previous publication

File Details

Date Uploaded
Date Modified
2014-04-29T15:52:34.066+00:00
Audit Status
Audits have not yet been run on this file.
Characterization
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 15577773
Last modified: 2015:10:12 20:54:17-06:00
Filename: Lacoursiere_Ryan_Fall 2010.pdf
Original checksum: 2a5d500c41958f87946a79c905ddc944
Well formed: false
Valid: false
Status message: Invalid object number in cross-reference stream offset=15577737
Activity of users you follow
User Activity Date