The surface roughness of orthodontic archwires is an essential factor that determines the effectiveness of arch-guided tooth movement. Using the non-destructive techniques of atomic force microscopy (AFM) and of laser specular reflectance, the surface roughness of 11 nickel-titanium orthodontic wires, a stainless steel and a beta-titanium wire was measured. The results were compared with those ...

The archwire bending is one of processes the most frequently used in the orthodontic treatment. Furthermore, the springback of sheet metal, which is defined as elastic recovery of the part during unloading, should be taken into consideration so as to produce formed archwire within acceptable tolerance limits. In this paper, the springback angle of different alloy archwires (including NiTi alloy...

f bstract canning electron microscopy (SEM) and differential canning calorimetric (DSC) studies were utilized to nvestigate surface and microstructure of two brands of otary nickel-titanium (NiTi) endodontic instruments, in he as-received condition and after subjection to 1, 6, nd 11 sterilization cycles. A total of 66 ProFile (n 3) and Flexmaster (n 33) files were examined. SEM bservations ind...

Wire and arc additive manufacturing (WAAM) technology was used for the fabrication of NiTiTa (2.5 at. % Ta) shape memory alloys (SMAs) first time, using commercialy available NiTi wire Ta foil as feedstock materials. The addition significantly increased phase transformation temperatures, leading to a room-temperature microstructure composed both B19? martensite B2 austenite, (Ti,Ta)2Ni precipit...