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

• Autor(a) principal: Santos, Rogério Lacerda dos
• Data de Publicação: 2015
• Outros Autores: Pithon, Matheus Melo, Souza, Margareth Maria Gomes de, Bolognese, Ana Maria, Araújo, Mônica Tirre de Souza
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Brazilian journal of oral sciences (Online)
• Texto Completo: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8642141
• topic: Orthodontics; Malocclusion; Nickel; Hypersensitivity; Odontology

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.