Results 231 to 240 of about 10,721 (255)

Orthodontic wire: a continuing evolution

Seminars in Orthodontics, 1997
Wires have substantial structural presence in active and retentive orthodontic therapy. Wires, and auxiliaries fabricated from wire, may deliver force to produce dental displacements, they may attempt to prevent unwanted displacements, or they may simply carry force from one location to another within the dentofacial complex.
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A rationale for the selection of orthodontic wires

The European Journal of Orthodontics, 1992
A logical basis for the sequence of wires chosen during orthodontic treatment with fixed appliances is presented. This utilizes a new more realistic model for the radial deflection of a segment of the archwire in which the wire is restrained by the ligatures on the misaligned tooth, contacts the inner edges of the brackets either side, and is ...
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Force relaxation in orthodontic arch wires

American Journal of Orthodontics, 1984
Wire selection for use in an orthodontic appliance is usually based upon clinical impressions. This is unsatisfactory. A far better basis for selection would be measured values of the forces exerted by the arch wire, both initially on insertion of the appliance and their variation with time as a result of tooth movement and of stress relaxation in the ...
G.J. Rohan, R.J. Hazel, V.C. West
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Noncontact microstrain measurements in orthodontic wires

Journal of Biomedical Materials Research, 1995
AbstractA technique is presented that allows for highly sensitive and highly accurate measurements of microstrain in biomaterials. It is particularly useful for measuring strains in materials where the use of conventional extensometers or strain gauges is impracticable, such as in reinforcement fibers and orthodontic wires and in hostile environments ...
Donald D. Duncan, Sean J. Kirkpatrick
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Wire syndrome: a complication in orthodontic retention

Dental Update, 2023
‘Wire syndrome’ is a phenomenon that involves fixed orthodontic retainers causing unwanted tooth movement. In severe cases, the retainer may have debonded from the teeth. This article addresses the prevalence, presentation and management of wire syndrome.
Aliya Hasan, Reena Wadia, Devan S Raindi
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Bending Deformation Studies of Orthodontic Wires

Journal of Dental Research, 1978
Bending deformation has been measured for orthodontic wires ranging in diameter from .010 to .051 inch. 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. The dependence of test span length in determining Young's
William A. Brantley, C. Louis Myers, William S. Augat, Robert V. Winders   +3 more
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Analysis of orthodontic wire springback to simplify wire bending

Orthodontic Waves, 2020
Purpose: This study aims to analyse the springback behaviour of commercial orthodontic wires.Materials and methods: The relationship between the predetermined bending angle (x) and the obtained ben...
Hiroshi Kono, Masafumi Kikuchi
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Corrosion of silver soldered orthodontic wires

Acta Odontologica Scandinavica, 1982
The amounts of metals liberated from silver soldered stainless steel and cobalt-chromium orthodontic wires were measured. Measurements were taken after 3 days and 24 days immersion in 0.9% sodium chloride solution. High amounts of copper and zinc and some cadmium from the silver solder were found.
Morten Berge, Nils Roar Gjerdet, Egil S. Erichsen   +2 more
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The Flexure Modulus of Elasticity of Orthodontic Wires

Journal of Dental Research, 1983
The flexure moduli of elasticity of solid and multi-stranded orthodontic wires were determined. Results for the solid wires approximated their tensile values, but the differences were statistically significant for the stainless steel, chromium-cobalt-nickel, and nickel-titanium alloys. The flexure moduli of the multi-stranded wires ranged from 0.89 to
C.J. Burstone, A.J. Goldberg, J. Morton
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Reduction in the Modulus of Elasticity in Orthodontic Wires

Journal of Dental Research, 1977
The modulus of elasticity of stainless steel orthodontic wires was found to be 20% below the normally assumed range of 19.3 to 20.0 X 104 MPa (28.0 to 29.0 × 106 psi). Use of the latter value can result in significant computational errors in orthodontic applicance mechanics. The lower modulus was attributed to severe cold drawing.
Ray Vanderby, C.J. Burstone, A. Jon Goldberg   +2 more
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