T s e d a c w m bstract his study assessed the apical leakage of ultrasonically ondensed root fillings in extremely large canals, comared to cold lateral condensation and thermoplastic ompaction. Ninety single-rooted teeth were used. In 5 teeth canals were enlarged to size 70 (large). The emaining 45 canals were enlarged to size 140 (exremely large). Each set of teeth was subdivided into hree r...

In this paper an exhaustive scientific work is performed, by means of metallographic and scanning electron microscope (SEM) techniques, the microstructural defects exhibited pearlitic steels their evolution with manufacturing process cold drawing, analyzing consequences such on isotropic/anisotropic fracture behavior different steels. Thus, objective establishment a relation between damage To e...

Cold forging is often applied in the fastener industry. Wires in coil form are used as semi-finished products for the production of billets. This process usually requires preliminarily drawing wire coil in order to reduce the diameter of products. The wire usually has to be annealed to improve its cold formability. The quality of spheroidizing annealed wire affects the forming quality of screws...

The size and length effects of an inclusion on multi-pass copper shaped-wire drawing were investigated. For this purpose, an experimental investigation on optimal die half-angle was conducted. Based on experimental data of optimal die half-angle, wire and inclusion deformations, drawing and hydrostatic stress of copper shaped-wires that contain an inclusion were calculated by two-dimensional fi...

A proximity drawing of a graph is a straight-line drawing where adjacent vertices are represented by points that are deemed to be close according to some proximity measure. A rectangle of innuence drawing is a proximity drawing where the measure is based on the concept of rectangle of innuence. Given two points u and v, the rectangle of innuence of u and v is the axis-aligned rectangle having u...