Results 171 to 180 of about 5,947 (216)

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.
W A, Brantley, W S, Augat, C L, Myers, R V, Winders   +3 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.
A J, Goldberg, J, Morton, C J, Burstone
openaire   +3 more sources

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 10 4 MPa (28.0 to 29.0 × 106 psi). Use of the latter value can result in significant computational errors in orthodontic applicance mechanics.
A J, Goldberg, R, Vanderby, C J, Burstone   +2 more
openaire   +3 more sources

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Tensile properties of orthodontic wire

American Journal of Orthodontics, 1977
1. Wires with a range of tensile properties are available for construction of a Stage 1 arch wire in the Begg orthodontic appliance. 2. Over a period of 3 days, a detectable amount of stress relaxation occurs in some orthodontic wires loaded initially to 20 kg.
C C, Twelftree, G J, Cocks, M R, Sims
openaire   +2 more sources

The corrosion of orthodontic wire

The European Journal of Orthodontics, 1988
The corrosion of stainless steel orthodontic wire was investigated using the electrochemical technique of polarization resistance. A potentiostat was used to apply small perturbations about the corrosion potential and the resultant current was measured.
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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 ...
S J, Kirkpatrick, D D, Duncan
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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 ...
R J, Hazel, G J, Rohan, V C, West
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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.
openaire   +2 more sources

The mechanical properties of four orthodontic wires and the orthodontic force of a quad helix made of four orthodontic wires

Orthodontic Waves, 2014
Orthod Waves–Jpn Ed 2013;72(2):115–120The purposes of this study were to compare the mechanical properties of four different commercially available wires (two beta-titanium alloy wires, stainless s...
Takeshi Muguruma, Shigemasa Kobayashi, Masahiro Iijima, Itaru Mizoguchi   +3 more
openaire   +1 more source

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 ...
openaire   +2 more sources