AIM The aim of this study was (i) to evaluate the formation of air bubbles in the apical region of root canal (apical vapor lock) during syringe irrigation, using cone beam computed tomography (CBCT) and (ii) comparative evaluation of the elimination of an established vapor lock by EndoActivator, ultrasonics, and manual dynamic agitation (MDA), using CBCT. MATERIALS AND METHODS A total of 60 ...

Low power ultrasonics are used for testing high density polyethylene pipe material. Attenuation and velocity give valuable information on the material in situ without damages. In this paper we revisit recent data frequency band (4,10) megahertz. We prove that propagation is equivalent to random delays following stable probability laws. Moreover, emergence of a companion noise non-detectable by ...

Laser Ultrasonics is a non-contact inspection technology that uses lasers to induce and detect ultrasonic waves in a material system. LaserUTTM, the Lockheed Martin (LM) developed pulse-echo implementation of Laser Ultrasonics for composite structures, has been used to perform non-destructive inspections of over 22,000 production parts at the LM Aeronautics-Fort Worth facility since the first o...