Accession Number : ADA185669

Title :   Torsional Elastic Property Measurements of Selected Orthodontic Archwires.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Larson, Brent E

PDF Url : ADA185669

Report Date : Jan 1987

Pagination or Media Count : 93

Abstract : A method for quantifying the torsional elastic properties of orthodontic archwires was investigated. Three wire sizes (.018 inch, .017 inch x.025, and .019inch x.025) were tested for three different alloys: stainless steel S.S., beta titanium B-Ti, and nickel-titanium Ni-Ti. The shear modulus (G) was determined dynamically using a torsion pendulum. The torsional yield strength (Tys) was determined using a static torsion test that generated torque (T) versus angular deflection (phi) tracings. The three basic torsional elastic properties (strength, stiffness, and range) were calculated for each of the wires from G, Tys, and precise dimensional data. The Ni-Ti wire had the greatest range and the least stiffness. S.S. archwire showed the greatest stiffness and the least range. The properties of B-Ti fell

Descriptors :   *ELASTIC PROPERTIES, *WIRE, *STAINLESS STEEL, *DENTAL EQUIPMENT, ANGULAR MOTION, MEASUREMENT, NICKEL ALLOYS, PENDULUMS, SIZES(DIMENSIONS), STATIC TESTS, STIFFNESS, THESES, TITANIUM ALLOYS, TORQUE, TORSION, YIELD STRENGTH, TEETH

Subject Categories : Properties of Metals and Alloys
      Medical Facilities, Equipment and Supplies
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE