Introduction: When using sliding mechanics for space closure during orthodontic treatment, friction occurs at the bracket-wire interface. The aim of this study was to evaluate the frictional resistance between monocrystalline (ICE) brackets and Stainless Steel, Beta TMA and NiTi wires. Methods: In this experimental study, we used 5 different types of orthodontic wires. Brackets and wires wer...

The nanowire crossbar is a promising nanotechnology for assembling memories and circuits. In both, a small number of lithographically produced mesoscale wires (MWs) must control a large number of nanoscale wires (NWs). Previous strategies for achieving this have been vunerable to misalignment. In this paper, we introduce core-shell NWs, which eliminate misalignment errors. We also give a two-st...

Whereas the spatial coherence of wall pressure and vibratory fields induced by turbulent boundary layers (TBLs) on flat plates have been studied at extent, their equivalents for cylindrical structures still need further investigation. To that end, this work develops a semi-analytical model which is valid infinite shells filled with heavy fluid excited an internal TBL. The shell can be also coup...

technique of endoscopic ultrasound (EUS)-guided pseudocyst drainage as a one-step procedure using a novel multiple wire insertion technique facilitated by the double-lumen biliary cytology brush catheter (Cook Medical, Winston-Salem, North Carolina, USA). Six symptomatic patients underwent EUS-guided pseudocyst drainage using the novel multiple wire insertion technique (●" Video 1). After ensur...

The key to successful long-term peritoneal dialysis (PD) is permanent and safe access to peritoneal cavity. The two most commonly used Tenckoff catheters for PD are the straight and coiled catheters. The present study was undertaken to assess the catheter survival, catheter associated infections, and all cause mortality and to compare the straight with coiled catheters in PD. During April 1997-...

background: the advantages of coated orthodontic wires such as esthetic and their effectson reduced friction, corrosion and allergic reaction and the signifi cant consequences of plaque accumulation on oral health encouraged us to assess bacterial colonization on these wires. materials and methods: a total of 18 (9 upper and 9 lower) epoxy resin coated 16 × 22 nickeltitanium wires (spectra, gac...

We developed a new implantable FES system with 32 output channels. In this system, a RF coil utilizing amorphous magnetic fibers was introduced for increasing transmission efficiency of this telemeter system which transmitted currents for electric power supply to the implanted system and for applying electrical stimulation to the paralyzed muscles. A helically coiled 19 strand rope wound from u...

Insight into crumpling or compaction of one-dimensional objects is important for understanding biopolymer packaging and designing innovative technological devices. By compacting various types of wires in rigid confinements and characterizing the morphology of the resulting crumpled structures, here, we report how friction, plasticity and torsion enhance disorder, leading to a transition from co...

Coiled Artificial Muscles In article number 2210419, Zhen Jiang, Geoffrey M. Spinks, and co-workers introduce a liquid crystalline organogel combined into twisted coiled fiber geometry to generate powerful soft artificial muscle with fast response small temperature changes.

This case illustrates the importance of a thorough clinical history and the benefit of histopathologic examination. The history of contact allergy to jewelry provided an early clue, and the microscopic features confirmed the clinical impression of allergic stomatitis.