We propose a simple design of a rotary nanomotor comprised of three quantum dots attached to the rotating ring (rotor) in the presence of an in-plane dc electric field. The quantum dots (sites) can be coupled to or decoupled from source and drain carrier reservoirs, depending on the relative positions of the leads and the dots. We derive equations for the site populations and solve these equati...

The rationale of this study was to assess the results of training endodontic to postgraduates. This study was assumed to evaluate the procedural quality of root canal obturation and occurrence of ritual errors in the root canal treatment cases performed by postgraduates in the department of Operative Dentistry. Study Design: Cross sectional case series study. Setting: Department Operative Denti...

The angular error of indexing table on machine tool is measured using new developed measuring device. The measuring techniques, which have been reviewed in this paper, are currently available in manufacturing engineering to calibrate the angle measurement. The new developed measuring device using 6 points kinematic concept and employing ball and vee grooves is used to calibrate angle errors of ...

The aim was to assess the presence of smear layer after canal instrumentation with two reciprocating rotary systems and a continuous motion one. Thirty canals were shaped with Reciproc, WaveOne or Mtwo systems. Smear layer was assessed following a three value scale at coronal, middle and apical levels with a scanning electron microscopy. Reciproc scores: coronal third, 20% of the cases: 0, 60%:...

OBJECTIVE The present study was designed to test the null hypothesis that there is no significant difference in debridement quality promoted by 3 nickel-titanium (NiTi) rotary systems. STUDY DESIGN Sixty-seven vital mandibular molars that were prospectively collected in vivo were used. The teeth were extracted and then pulp tissue fixed by 10% formalin. The use of different NiTi rotary system...