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Permanent link (DOI): https://doi.org/10.7939/R3702S

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The effect of wire alloy on torque expression in metallic self-ligating orthodontic brackets Open Access

Descriptions

Other title
Subject/Keyword
torque
bracket
self-ligating
wire
orthodontic
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Archambault, Amy
Supervisor and department
Major, Paul (Dentistry)
Examining committee member and department
Carey, Jason (Mechanical Engineering)
Nobes, David (Mechanical Engineering)
Heo, Giseon (Dentistry)
Flores-Mir, Carlos (Dentistry)
Department
Department of Dentistry
Specialization

Date accepted
2009-07-21T18:28:42Z
Graduation date
2009-11
Degree
Master of Science
Degree level
Master's
Abstract
The objective of this thesis was to identify differences in torque expression between three brands of metallic self-ligating brackets with stainless steel, TMA® and CuNiTi® wire and to compare active and passive designs. 150 of each Damon-3MX (Ormco Inc, Orange, CA, USA), SPEED (Strite Industries, Cambridge, Ontario, Canada) and In-Ovation-R (GAC, Bohemia, NY, USA) brackets were measured for torque expression (Nmm) in an Air-shields Isolette® infant incubator. Torque expression in SPEED and In-Ovation-R brackets began at approximately 7.5° vs. 12° with Damon-3MX. Clinically applicable torque expression (5-20Nmm) was observed from approximately 15-30° in SPEED & In-Ovation-R brackets with stainless steel wire. In Damon-3MX, comparable torsional moments were expressed from 18-30°. With TMA wire, SPEED exerted clinically applicable torsional moments from 18-39°, In-Ovation-R from 21-39° and Damon-3MX from 21-42°. For CuNiTi wire, SPEED expressed torsional moments of 5-20Nmm from 21-72°, In-Ovation-R from 24-63° and Damon-3MX from 27-78°.
Language
English
DOI
doi:10.7939/R3702S
Rights
License granted by Amy Archambault (archamba@ualberta.ca) on 2009-07-19T14:54:43Z (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.
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File title: University of Alberta
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