The aim of the present study was to prospectively assess the frequency of teeth in which the Reciproc instruments were able to reach the full working length (WL). This case series study enrolled 277 consecutive teeth requiring primary endodontic treatment performed with the Reciproc system (VDW) without a previous glide path by 3 experienced endodontists. Instruments R25, R40 or R50 were select...

INTRODUCTION The aim of this study was to compare the cyclic fatigue resistances of nickel-titanium rotary glide path files, which are manufactured as single-file systems, under dynamic model. METHODS Twenty ProGlider (16.02) and 20 One G (14.03) nickel-titanium glide path files were included in this study. Cyclic fatigue tests were performed with specifically manufactured dynamic cyclic test...

Although many cylindrical animals swim through water, flying snakes of the genus Chrysopelea are the only limbless animals that glide through air. Despite a lack of limbs, these snakes can actively launch by jumping, maintain a stable glide path without obvious control surfaces, maneuver, and safely land without injury. Jumping takeoffs employ vertically looped kinematics that seem to be differ...

Abstract Background This randomized clinical trial aimed to compare the preparation time and severity of postoperative pain between HyFlex Electric Discharge Machine (EDM) glide path file (GPF) PathFile. Methods Eighty patients whose molar teeth had at least one severely curved canal were treated by same specialist. After access cavity preparation, randomly assigned receive enlargement with eit...

prepared when shaping files have a reproducible and sufficiently-sized pathway to follow. The secret to shaping success is glide path management (GPM), which may be thought of as procedures directed toward "securing" canals. Any portion of any canal is termed secured when a small-sized flexible hand file can reproducibly slip, slide, and glide through a catheterized canal.1 Similar to a cardiac...

We analyze the trajectory perturbations that result in phugoid oscillations during the grazing planetary entry of space vehicles starting with near-circular speed, in ballistic and equilibrium glide modes. The equations for planar entry are transformed into a dimensionless system appropriate for an analytical integration that provides accurate results in comparison with those obtained from a nu...

Flying snake species (Chrysopelea) locomote through the air despite a lack of appendages or any obvious external morphological specialization for flight. Here photogrammetric techniques were used to investigate C. paradisi's aerial trajectory in three dimensions. Two videocameras arranged in stereo were used to record head, midpoint and vent landmarks on snakes that jumped from a horizontal bra...

For lifting entry vehicle, angle of attack is one of the most important trajectory control inputs. This paper aims to develop a practical and effective method for angle of attack design. First, the factors which impact angle of attack are analyzed. The entry flight is discussed as equilibrium glide phase and initial diving phase respectively. And the operation zone of angle of attack is obtaine...

The aim of this study was to compare the cyclic fatigue resistance (CFR) PathFile (Dentsply Sirona, Ballaigues, Switzerland) and ScoutRace (FKG Dentaire, La Chaux-de-Fonds, glide path files which were either new or previously used. Forty (PF) 19/.02 40 (SR) 20/.02 instruments used for study. Half in each group (PF-U SR-U) 3D demo tooth models creating paths, while other half (PF-N SR-N) directl...

This analysis explores (1) whether plan demographic characteristics would affect individual participant contribution rates and target-date fund investments and (2) equity glide paths for participants in relation to plan demographics by considering target replacement income and its success rate. PLAN DEMOGRAPHIC CHARACTERISTICS IN PARTICIPANT CONTRIBUTION RATES: This study finds empirical eviden...