Abstract

PERES, Rafael Vidal; FERNANDES, Daniel Jogaib; RUELLAS, Antônio Carlos de Oliveira  and  ELIAS, Carlos Nelson. Bending properties of Ni-Ti alloys wires. Rev. Bras. Odontol. [online]. 2012, vol.69, n.2, pp. 266-271. ISSN 1984-3747.

The nickel-titanium (Ni-Ti) alloys are used in the manufacture of orthodontic wires mainly due to its greater resilience and low modulus of elasticity when compared to other alloys, particularly stainless steel. The aim of this study was to compare the mechanical properties of shape memory alloys wires in three-point bending in different manufacturers. Two lots of three manufacturers were tested in three-point bending according to ISO 15841:2006 (E). The results showed that wires designated as termoactivated generated lower tensions than the designated as superelastic, variations of up to 28% between wires designated as superelastic and 31% between wires d esignated as termoactivated were found. In the manufacturer lots comparison was also not observed homogeneity between wires.

Keywords : three-point bending; shape memory; superelasticity..