Evaluation of palatal arches made from low-nickel stainless steel wire

• Main Authors: Rogério Lacerda dos Santos (Author), Matheus Melo Pithon (Author), Margareth Maria Gomes de Souza (Author), Ana Maria Bolognese (Author), Mônica Tirre de Souza Araújo (Author)
• Format: Book
• Published: Universidade Estadual de Campinas, 2015-12-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.
• Notes: 10.20396/bjos.v8i3.8642141; 1677-3225
• Keywords: Orthodontics; Malocclusion; Nickel; Hypersensitivity; Dentistry; RK1-715
• Source: Brazilian Journal of Oral Sciences, Vol 8, Iss 3 (2015)

Aim: To test the hypothesis that there is no difference between stainless steel wires and low-nickel stainless steel ones regarding their mechanical behavior. Force, resilience and elasticity modulus produced by Coffin, "W" arch, and Quad-helix appliances made of 0.032-inch and 0.036-inch wires were evaluated. Methods: Fifteen appliances of each type (Coffin, "W" arch, and Quad-helix) were made according to metal alloy and wire thickness. All arches (12 groups of 15 appliances each) were submitted to mechanical compression test by using an EMIC DL-10000 machine simulating activations of 5, 8, 10, and 12 mm. Analysis of variance with multiple comparisons and Tukey's test were used (P < 0.05) for analyzing statistically force and resilience data. Results: The results showed that mechanical properties depended on shape of the appliance, diameter of the wire, amount of activation, and metal alloy. Conclusions: Appliances made from lownickel stainless steel alloy had higher release of force, resilience and elasticity modulus compared to those made of stainless steel alloy.