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

  • Author / Creator
    Fathimani, Maryam
  • 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.

  • Subjects / Keywords
  • Graduation date
    Spring 2013
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.