Comparison of superelastic orthodontic archwires with multiple force levels
Date
2005
DOI
Authors
Niaraki, Nayson
Version
OA Version
Citation
Abstract
New nickel-titanium orthodontic wires which display different force levels in the same arch have been advertised by their manufacturers to minimize root resorbtion and decrease treatment time. This is achieved by providing forces proportional to the various root sizes. The purpose of this study was to examine the characteristics of 3 different multiple force archwires using a new model to simulate the clinical environment. Cantilever testing at 7 different points on each wire confirmed that force levels increase from anterior to posterior position along the archwire. Five wires from each manufacturer were then ligated to the simulation model at two deflection distance (1.0 mm and 1.5 mm) and at two temperatures (25 and 35 degrees Celsius) at the lateral and molar positions. Results of the study showed significantly higher force levels in the anterior segment then what was found in the posterior position of each archwire tested, which is not in accordance with the manufacturers claims. Load-deflection testing showed that none of the multiple force level wires tested exhibited superelastic behavior.
Description
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Thesis (MSD)--Boston University, Goldman School of Dental Medicine, 2005.
Includes bibliographical references: leaves 61-62.
Thesis (MSD)--Boston University, Goldman School of Dental Medicine, 2005.
Includes bibliographical references: leaves 61-62.
License
This work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.