Abstract Ultrashort laser pulses are used to generate Laser-Induced Periodic Surface Structures (LIPSS). To apply LIPSS on small confined areas, the source must be focused a spot diameter. Contrary commonly high numerical aperture objectives, we present Bessel beam-based approach produce covered lines with width of 4 10 µm. Therefore, an 800 nm Ti:Sa-laser pulse duration 110 fs and repetition r...

The formation of stress-induced martensite in superelastic NiTi was studied by neutron diffraction during uniaxial compressive loading and unloading. The respective phase fractions were determined as a function of the applied stresses using a Rietveld refinement with a March–Dollase texture formulation. Before loading, the specimen was fully austenitic. At the highest applied stress of 2625 MPa...

OBJECTIVES The aim was to evaluate the in vitro effects of fluoride solutions with different acidities on load-deflection characteristics of nickel-titanium (NiTi) orthodontic wires. MATERIALS AND METHODS In this study, which lasted 30 days, 36 (3 cm long, 0.016 × 0.022 inches, SENT 1622, G & H wire Company, Greenwood, Indiana, USA) NiTi wires, were divided into three experimental groups of 1...

The biomedical industry has an increasing demand for processes to join dissimilar metals, such as laser welding of NiTi and stainless steel wires. A region of the weld close to the NiTi interface, which previously was shown to be prone to cracking, was further analyzed by energy dispersive spectrometry (EDS) extended in the third dimension using a focused ion beam. As the spatial resolution of ...

of the PhD thesis: Influence of archwires mechanical properties and surface caracteristics in orthodontic biomechanics Coordinator: Mariana PACURAR,Prof. M.D. PhD student: Silvia-Izabella POP The principle of fixed orthodontic therapy is based on tooth movement, generated by light and continous forces. Orthodontic archwires are key elements in producing such forces and their clinical selection ...

Objective: The purpose of this in vitro study is that NiTi esthetic arch wires are preferred to match estheticbraces; but the presence coating layer greatly affect friction during sliding mechanics.The aims were evaluate load deflection and influence surface roughness with thecoating material types on frictional force coated nickel titanium wires.Method: sample consisted 90 segments uncoated Ni...

OBJECTIVE To compare the frictional resistance between self-ligating and conventional brackets tied to different types of wire. MATERIAL AND METHODS Abzil Kirium Capelozza (Pattern I) and Easy Clip (Roth prescription) incisor brackets were used. An elastomeric ligature or a 0.10-in ligating wire was used to ligate the wire to the Abzil bracket. Three types of orthodontic archwire alloys were ...