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Permanent link (DOI): https://doi.org/10.7939/R3F11M
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The Effect of Conventional Elastomers on Force and Moment of a Self-Ligating Orthodontic Bracket with Second-Order Angulation in the Dry and Wet States evaluated through a new 3D Friction Device Open Access
- Other title
- Type of item
- Degree grantor
University of Alberta
- Author or creator
- Supervisor and department
Toogood, Roger (Mechanical Engineering)
Major, Paul (Dentistry)
- Examining committee member and department
Flores-Mir, Carlos (Dentistry)
Heo, Giseon (Dentistry)
- Date accepted
- Graduation date
Master of Science
- Degree level
Objective: A new three-dimensional friction device was used to investigate the effect of conventional elastomers on force and moment of a self-ligating orthodontic bracket with second-order angulation during a simulated retraction.
Methods: An 0.018x0.025-in stainless steel archwire was drawn through a 0.022-in Damon Q self-ligating bracket at a rate of 6mm/min. 130 brackets, 65 with and 65 without conventional elastomers, were tested at angulations from 0° to 5° and in dry and wet (human saliva) states. Force and moment values were recorded in x, y, and z directions.
Results: There was strong evidence for force and moment to be significantly influenced by the effects of angulation, elastomer, state, and all interactions. Angulation, elastomer, and the interaction of angulation and elastomer were the primary influencers, whereas saliva had little effect or lubricious behavior.
Conclusions: The tested self-ligating bracket had less force and moment compared to the same bracket with elastomer addition.
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Filename: Fathimani_Maryam_Spring 2013.pdf
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Status message: File header gives version as 1.4, but catalog dictionary gives version as 1.3
File author: Maryam Fathimani
Page count: 144