Abstract
The objective of this study was to test the hypothesis that there is no difference between stainless steel and low-nickel stainless steel wires as regards mechanical behavior. Force, resilience, and elastic modulus produced by Quad-helix appliances made of 0.032-inch and 0.036-inch wires were evaluated. Sixty Quad-helix appliances were made, thirty for each type of alloy, being fifteen for each wire thickness, 0.032-in and 0.036-in. All the archwires were submitted to mechanical compression test using an EMIC DL-10000 machine simulating activations of 4, 6, 9, and 12 mm. Analysis of variance (ANOVA) with multiple comparisons and Tukey's test were used (p < 0.05) to assess force, resilience, and elastic modulus. Statistically significant difference in the forces generated, resilience and elastic modulus were found between the 0.032-in and 0.036-in thicknesses (p < 0.05). Appliances made of low-nickel stainless steel alloy had force, resilience, and elastic modulus similar to those made of stainless steel alloy.
Highlights
There may be urticariform and eczematous reactions in the face or in more distant areas of the body.[12]. To solve this problem, stainless steel alloys with low nickel content began to be used for fabricating appliances, among them the expanders used for the correction of posterior tooth crossbite
The aim of this study was to test the hypothesis that there would be no difference in the mechanical performance between stainless steel wires and stainless steel wires with a low nickel content when evaluating force, resilience and modulus of elasticity produced by the Quad-helix appliance used for correcting posterior tooth crossbite, and to determine the ideal activation levels for each appliance
The low-nickel stainless steel showed greater release of force, resilience and modulus of elasticity compared with conventional stainless steel (Tables 1 and 2)
Summary
The objective of this study was to test the hypothesis that there is no difference between stainless steel and low-nickel stainless steel wires as regards mechanical behavior. There may be urticariform and eczematous reactions in the face or in more distant areas of the body.[12] To solve this problem, stainless steel alloys with low nickel content began to be used for fabricating appliances, among them the expanders used for the correction of posterior tooth crossbite. The aim of this study was to test the hypothesis that there would be no difference in the mechanical performance between stainless steel wires and stainless steel wires with a low nickel content when evaluating force, resilience and modulus of elasticity produced by the Quad-helix appliance used for correcting posterior tooth crossbite, and to determine the ideal activation levels for each appliance
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