The use of an ultrasonic apical preparation technique has been advocated recently. Root-end preparations in 30 extracted single-canaled human teeth were evaluated, comparing those prepared with ultrasonic instrumentation alone, or in combination with rotary bur preparation, to those prepared with rotary instrumentation alone. Specimens were evaluated for the presence of debris, smear layer, and...

STUDY DESIGN Biomechanical study. OBJECTIVE Recently, a posterior concave periapical distraction device for fusionless scoliosis correction was introduced. The goal of this study was to quantify the effect of the periapical distraction device on spinal range of motion (ROM) in comparison with traditional rigid pedicle screw-rod instrumentation. METHODS Using a spinal motion simulator, 6 hum...

We present Privacy Scope, a new system that tracks the movement of sensitive user data as it flows through off-the-shelf applications. Privacy Scope uses application-level dynamic taint analysis, implemented with dynamic binary translation tools, to let users run applications in their own environment while pinpointing information leaks, even when the sensitive data is encrypted. The system is m...

Thread migration is to support the movement of threads across machine boundaries in a distributed computing environment. It can improve load balancing and the execution efficiency of multithreaded programs. In this paper, we introduce a new approach that employs the technique of Just-in-Time (JIT) recompilation to support transparent thread migration. With JIT recompilation, the native thread e...

background: the aim of this study was to evaluate apical transportation and centering ability of single-fi le instruments, waveone primary, with full rotation versus reciprocation movement using cone-beam computed tomography (cbct) analysis in curved mesiobuccal (mb) root canal of human mandibular molars. materials and methods: thirty mb canals of mandibular molars were randomly divided into tw...

This paper introduces the Open-Loop Intermittent Feedback Optimal pre-dictive (OLIFO) controller as an alternative to human movement control models based on system inverse control. OLIFO has the advantages of being applicable to any system, not requiring a desired system trajectory and handling naturally systems with time delays and constraints. Moreover, it shares important functional characte...