Journal ArticleDOI
Flexure Modulus of Orthodontic Stainless Steel Wires
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TLDR
The flexure modulus of standard stainless steel orthodontic wires was determined by the use of an iterative finite element technique to be 25.4 x 10(6) psi (175 x 10 (3) MN/m2) as mentioned in this paper.Abstract:
The flexure modulus of elasticity of standard stainless steel orthodontic wires was determined by the use of an iterative finite element technique to be 25.4 x 10(6) psi (175 x 10(3) MN/m2). This technique accounts for the configurational changes in the test specimens due to the relatively large deflection during the cantilever test. Under these conditions, the elementary strength of materials relationships does not accurately describe the flexure characteristics of the wires.read more
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Variable-modulus orthodontics
TL;DR: A new approach to force control in presented which allows wire size to remain relatively constant and the material of the wire is selected on the basis of clinical requirements.
Journal ArticleDOI
Bending properties of superelastic and nonsuperelastic nickel-titanium orthodontic wires.
TL;DR: The differences in the bending properties and heat treatment responses are attributed to the relative proportions of the austenitic and martensitic forms of nickel-titanium alloy (NiTi) in the microstructures of the wire alloys.
Journal ArticleDOI
Comparison of bending and tension tests for orthodontic wires.
TL;DR: Improved procedures are described for performing the tension test on the relatively small cross-section orthodontic wires, and measured values of E and YS in bending were almost invariably higher than the corresponding values obtained in tension.
Journal ArticleDOI
Physical, mechanical, and flexural properties of 3 orthodontic wires: an in-vitro study.
TL;DR: The beta-titanium alloy with increased UTS and YS had a low E value, suggesting that it would have greater resistance to fracture, thereby overcoming a major disadvantage of titanium-molybdenum alloy wires.
Journal ArticleDOI
Maximum forces and deflections from orthodontic appliances
TL;DR: The study supports the hypothesis that most orthodontic appliances are activated in a range where both plastic and elastic behavior occurs; therefore, the use of yield strengths for calculation of force magnitude can lead to a significant error in predicting the forces delivered.
References
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Theory of elasticity
TL;DR: The theory of the slipline field is used in this article to solve the problem of stable and non-stressed problems in plane strains in a plane-strain scenario.
Journal ArticleDOI
A Device for Determining the Mechanical Behavior of Orthodontic Appliances
TL;DR: A device for measuring uniplanar force systems from orthodontic appliances that can be used to rapidly determine forces and moments from appliances which are statically indeterminate is described.
Journal ArticleDOI
Bending Deformation Studies of Orthodontic Wires
TL;DR: Results establish a revised expression for Young's modulus and show that either the stiffness tester or the torque meter will yield essentially the same measured values of bending properties.