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Automated threshold algorithm of second wavelet transform is used in extraction of partial discharge. Exponential damping or exponential damping oscillating etc. two kinds of partial discharges are used in numeric simulation, and effectiveness of extraction of partial discharge is studied. Simulation results show that wavelet transform can effectively extract partial discharge from random noise because...
This study analyzed the progressive changes in canal shape after the use of different instruments by hand in simulated S-shaped canals.Forty simulated canals with double curvatures, 30° coronally and 20° apically, were randomly divided into four groups and prepared with stainless steel K-files, the ProTaper for hand use (PHU) system, NiTi K-files, and the combination of PHU and NiTi K-files, respectively,...
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