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Skip to Search Results- 208Mechanical Engineering, Department of
- 134Mechanical Engineering, Department of/Journal Articles (Mechanical Engineering)
- 74Mechanical Engineering, Department of/Progress in Canadian Mechanical Engineering, Volume 5
- 1Earth and Atmospheric Sciences, Department of
- 1Earth and Atmospheric Sciences, Department of/Journal Articles (Earth and Atmospheric Sciences)
- 1Physics, Department of
- 31Carey, Jason P.
- 17Major, Paul W.
- 15Hogan, James
- 14Melenka, Garrett W.
- 12Nobes, David S.
- 10Secanell, Marc
- 8Dynamic fragmentation
- 6Planetary materials
- 5Brittle fracture
- 5Deformation
- 5Porous media plumes
- 4Brittle failure
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Sensitivity Analysis for Plane Orientation in Three-Dimensional Cephalometric Analysis based on Superimposition of Serial CBCT Images
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Major, Paul W., Lagravère, Manuel O., Carey, Jason P.
Objectives: The purpose of this study was to evaluate the potential errors associated with superimposition of serial cone beam CT (CBCT) images utilizing reference planes based on cranial base landmarks using a sensitivity analysis. Methods: CBCT images from 62 patients participating in a...
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Measurement of orthodontic bracket tie wing elastic and plastic deformation by arch wire torque expression utilizing an optical image correlation technique
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Badawi, Hisham H., Homeniuk, Darren L.N., Lacoursiere, Ryan A., Carey, Jason P., Nobes, David S., Major, Paul W.
Orthodontic lingual root movement (torque) is an important aspect of treatment biomechanics and is typically achieved by torsion of a rectangular wire within the orthodontic bracket slot which introduces a force couple. The magnitude of the force moment achieved by wire torsion may be influenced...
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Orthodontic bracket manufacturing tolerances and dimensional differences between select self-ligating brackets
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Nobes, David S., Carey, Jason P., Major, Paul W., Major, Thomas W.
In all manufacturing processes there are tolerances; however, orthodontic bracket manufacturers seldom state the slot dimensional tolerances. This experiment develops a novel method of analyzing slot profile dimensions using photographs of the slot. Five points are selected along each wall, and...
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Review of Maxillary expansion appliance activation methods: engineering and clinical perspectives
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Lagravère, Manuel O., Carey, Jason P., Romanyk, Dan L., Major, Paul W., Toogood, Roger W.
Objective. Review the reported activation methods of maxillary expansion devices for midpalatal suture separation from an engineering perspective and suggest areas of improvement. Materials and Methods. A literature search of Scopus and PubMed was used to determine current expansion methods. A...
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2011
Nabih, Aliaa, Janssen, Meaghan, Kawchuk, Gregory N., Moussa, Walied, Carey, Jason P.
Back pain is a prevalent condition affecting much of the population at one time or the other. Complications, including neurological ones, can result from missed or mismanaged spinal abnormalities. These complications often result in serious patient injury and require more medical treatment....
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Micro-Scale Energy Dissipation Mechanisms During Fracture in Natural Polyphase Ceramic Blocks
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Vincent, Gregory, Boonsue, Suporn, Rogers, Robert, Spray, John, Schneider, Markus, Hogan, James
The dynamic fracture of natural polyphase ceramic (granite) blocks by high-speed impact at 207 m/s, 420 m/s and 537 m/s has been investigated. An electromagnetic railgun was used as the launch system. Results reveal that the number of fragments increases substantially, and the dominant length...
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An investigation into the mechanical characteristics of select self-ligated brackets at a series of clinically relevant maximum torquing angles: Loading and unloading curves and bracket deformation
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Nobes, David S., Major, Paul W., Melenka, Garrett W., Major, Thomas, Carey, Jason P.
Edgewise orthodontic treatment utilizes a force couple in order to achieve labial–lingual tooth angulation. Two self-ligating brackets (Damon Q and Speed) were examined across a range of clinically relevant torques in order to assess the loading and unloading curves and bracket deformation. A...
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Comparison of Deformation and Torque Expression of the Orthos and Orthos Ti Bracket Systems
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Major, Paul W., Melenka, Garrett W., Carey, Jason P., Nobes, David S., Heo, Giseon, Lacoursiere, Ryan A.
Orthodontic torque expression is the result of axial rotation of rectangular archwires within a rectangular bracket slot. This study investigates the effect of bracket material on torque expression. Torque exerted by a rotating archwire on each bracket will be measured as well as the relative...
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Experimentally Determined Mechanical Properties of, and Models for, the Periodontal Ligament: Critical Review of Current Literature
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Major, Paul W., Fill, Ted S., Carey, Jason P., Toogood, Roger W.
Introduction. This review is intended to highlight and discuss discrepancies in the literature of the periodontal ligament’s (PDL) mechanical properties and the various experimental approaches used to measure them. Methods. Searches were performed on biomechanical and orthodontic publications (in...