Background : Fractures are the most undesirable thing in endodontically treated teeth. The main reason teeth has a considerable risk for fractures is loss of tooth structure. Objective This study aims to determine effect access cavity preparation and instrument taper percentage on upper premolar fractures. Material Methods Twenty-four samples were stored sterile saline solution. sample was divi...

this paper is a computational study of the behavior of aerodynamics  characteristics of an airfoil with blunt trailing edge and  studies the effects aerodynamic performance caused by modifications made to the trailing edge. blunt trailing edge airfoils are of interest in the engineering of large wind turbine blades because they allow for a strong structure with a high aerodynamic lift to struct...

conclusions it is required to consider the strategies during student education in dental schools for both under and post-graduation dental students and better to follow them in workshops for other dentists and even endodontists. results the most stressful stage of root canal therapy was endodontic treatment for children in male endodontists and residents, preparing access cavity on crowns in fe...

A new planar antenna with double access and three separated bands is presented in this article. The first access operates over two bands, a narrow band for GPS standard (1.575 GHz), and a wideband covering PCS (1.85-1.99 GHZ) and UMTS (1.92-2.17 GHz) standards and also six sub bands of the new norm 3GPP (LTE). The second access operates over a wideband covering WLAN applications (2.4-2.484 GHz)...