OBJECTIVES The aim was to compare the shaping ability of WaveOne reciprocating files with or without glide path in simulated curved S-shaped root canals. MATERIALS AND METHODS Forty ISO #15, 0.02 taper, clear resin Endo Training Bloc-S blocks were studied. The simulated curved S-shaped canals were dyed using ink, preinstrumentation images were scanned, and resin blocks were prepared and divid...

The endodontic preparation of curved and narrow root canals is challenging, with a tendency for the prepared canal to deviate away from its natural axis. The aim of this study was to evaluate, by cone-beam computed tomography, the transportation and centering ability of curved mesiobuccal canals in maxillary molars after biomechanical preparation with different nickel-titanium (NiTi) rotary sys...

Background. Residual dysplasia occurs in some hip joints with DDH treated conservatively. This may lead to osteoarthrosis in relatively near future. Our study aimed to determine which radiographic parameters and clinical factors could reliably predict hip joint development after closed reduction. Material and methods. We examined 81 patients and 107 hip joints treated with over-head traction. T...

We present a novel neurally based model for estimating angular velocity (AV) in the bee brain, capable of quantitatively reproducing experimental observations of visual odometry and corridor-centering in free-flying honeybees, including previously unaccounted for manipulations of behaviour. The model is fitted using electrophysiological data, and tested using behavioural data. Based on our mode...

PURPOSES To examine radiographically the component motion in a bipolar prosthesis and to determine whether the self-centering mechanism really works in vivo. METHODS 38 patients with 41 bipolar hip endoprostheses (30 for coxarthrosis and 11 for osteonecrosis of femoral head) were included in this study. Two radiographs of each case were taken to evaluate the self-centering mechanism. The firs...

I discuss some calculations of the running coupling in SU(N) gauge theories from lattice simulations , centering on the work of the UKQCD collaboration. This talk is introductory in nature; full details have been published elsewhere.

Evolutionary and cognitive examples are used to motivate an approach to the brittleness problem and automated flexible cognition, centering on the notion of an anomaly as the key focus of processing.

A survey showed only 27% of our house-officers know how to intubate. Ninety-two percent however recognise the alternative to intubation. On the whole, knowledge centering around intubation is generally lacking.

rolling-based seismic isolation systems, in which rollers of circular or non-circular section are used, are less expensive and easier to manufacture. however, this type of isolation suffers from either lack of restoring or re-centering capability, or weakness against uplift forces. to resolve the first shortcoming the use of elliptical as well as pillow-shape rolling parts has been suggested, a...