[A comparison of archwires of memory alloys Nitinol, NiTi Ormco and Tru-chrome which were subjected to edgewise torsion of 20 degrees, 25 degrees, 30 degrees and 35 degrees and a temperature of 37 degrees Celsius].
Nickel-titanium (Nitinol, NiTi Ormco) and stainless steel (Tru-chrome) orthodontic archwires were studied by means of torsion test at 37 degrees Celsius. At small activations (20 degrees, 25 degrees, 30 degrees) nickel-titanium wires have a comparable stiffness to stainless steel wires. At larges activations (from 35 degrees) nickel-titanium wires produce lower moments than stainless steel wires. At 35 degrees of activation the average stiffness of NiTi Ormco is 56% that of Tru-chrome. At 35 degrees of activation the average stiffness of Nitinol is 43% that of Tru-chrome.
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D000497:Alloys / Q000737:chemistry*; D003722:Dental Alloys / Q000737:chemistry*; D004548:Elasticity; D006358:Hot Temperature; D009532:Nickel / Q000737:chemistry*; D009969:Orthodontic Wires; D013193:Stainless Steel / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
D000497:Alloys; D003722:Dental Alloys; C040654:titanium nickelide; D013193:Stainless Steel; C013616:nitinol; D009532:Nickel; D014025:Titanium
Comparaison des couples de rappel restitués par le Nitinol, le NiTi Ormco et le Tru-chrome lorsqu'ils sont soumis à une torsion sur chant de 20 degrees, 25 degrees, 30 degrees et 35 degrees à une température de 37 degrees Celsius.