BACKGROUND Controlled, uniformly tapered radicular preparation is a great challenge in endodontics. Improper preparation can lead to procedural errors like transportation of foramen, uneven dentine thickness, stripping of root canal, formation of ledge, zip, and elbow in curved canals. These procedural errors and their sequel can adversely affect the prognosis of treatment. AIM/OBJECTIVES The...

Led by the idea that “. . . using a graphing calculator to zoom in functions is one of the best ways of seeing local linearity” (Hughes-Hallet, Gleason et al. 1994), we discuss here the role of new technology in teaching and understanding mathematics and present a complete “route to derivatives”, which is particularly suitable for undergraduate teaching. Starting with a formal definition of the...

In thi paper we present a novel method for automatic detection of the Renals ROI, automat c detection of the dynamic Renograms excluding the pelv area, and the pathological Renograms are detected using RBF neural networks. The proposed diagnost c system was evaluated using 485 scin graphic files. The experimen al results g ve classification error less than 4.2%, with 96.9% sensitivity and 95.5%...

This paper address the problem of training HMMs using long files of uninterrupted speech with limited and constant memory requirements. The classical training algorithms usually require limited duration training utterances due to memory constraints for storing the generated trellis. Our solution allows to exploits databases that are transcribed, but not partitioned into sentences, using a slidi...

The main objective of the current paper is to show that electrochemical impedance spectroscopy (EIS) could be a method for evaluating and predicting of ProTaper rotary file system clinical lifespan. This particular aspect of everyday use of the endodontic files is of great importance in each dental practice and has profound clinical implications. The method used for quantification resides in th...

The purpose of this study was to compare and evaluate the shaping ability of the three different Ni-Ti file systems used by undergraduate students. Fifty undergraduate students prepared 150 simulated curved root canals in resin blocks with three Ni-Ti file systems ProFile (PF), Manual ProTaper (MPT), Rotary ProTaper (RPT). Every student prepared 3 simulated root canals with each system respecti...

The aim of the study was to compare the manual and rotary endodontic instruments focusing on risk of perforation when the whole root canal length is instrumented as well as the time required for preparation in primary teeth Fifty four teeth were divided randomly into three groups.Group I: The root canals were prepared manually with K-files. Group II : ProTaper instruments were used in a crown-d...