Mechanical properties of NiTi and CuNiTi wires used in orthodontictreatment. Part 2: Microscopic surface appraisal and metallurgicalcharacteristics

摘要

ObjectiveThis research aimed at comparing the qualitative chemical compositions and the surface morphology of fracture regions of eight types of Nickel (Ni) Titanium (Ti) conventional wires, superelastic and heat-activated (GAC, TP, Ormco, Masel, Morelli and Unitek), to the wires with addition of copper (CuNiTi 27ºC and 35ºC, Ormco) after traction test.