INTRODUCTION Apical transportation changes the physical shape and physiologic environment of the root canal terminus. The aim of the present experimental study was to determine the extent of apical transportation after instrumentation with hand K-Flexofile and K3 rotary instruments by means of cone-beam computed tomography (CBCT). METHODS AND MATERIALS Forty mesiobuccal root canals of maxilla...

Analytical supercritical fluid extraction (WE) is finding widespread application in the analysis of foodstuffs, agriculturally derived materials, and natural products. The high efficacy that SE demonstrates toward the removal of oils and fats from such matrices makes it a natural technique for the determination of their fat and oil content. In this review, we have highlighted what is essential ...

Ventilation conditions in mines must be monitored to ensure safe and healthy conditions. However, the multiplicity of ventilation branches and equipment make it impractical to automate measurement of parameters all over a mine. It is more practical to monitor a few critical measurements that are fully reliable and extrapolate to ‘predict’ remaining conditions using ventilation network software....

OBJECTIVE This study identified which regions of ProTaper instruments work during curved root canal instrumentation. MATERIAL AND METHODS Twelve ProTaper instruments of each type, S1, S2, F1, and F2, were assessed morphometrically by measuring tip angle, tip length, tip diameter, length of each pitch along the cutting blades, and instrument diameter at each millimeter from the tip. Curved can...