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Ultrasonic activation of internal bleaching agents
(2013-01-01)
Aim: To evaluate the effectiveness of ultrasonic activation of bleaching agents during ex vivo internal bleaching. Methodology: Fifty canine human teeth were artificially stained, root filled and divided into five groups ...
Sparse arrays and image compounding techniques for non-destructive testing using guided acoustic waves
(2013-06-01)
Piezoelectric array transducers applications are becoming usual in the ultrasonic non-destructive testing area. However, the number of elements can increase the system complexity, due to the necessity of multichannel ...
Ultrasonic sensor signals and optimum path forest classifier for the microstructural characterization of thermally-aged inconel 625 alloy
(2015)
Secondary phases, such as laves and carbides, are formed during the final solidification stages of nickel-based superalloy coatings deposited during the gas tungsten arc welding cold wire process. However, when aged at ...
Application of acoustic models for polydisperse emulsion characterization using ultrasonic spectroscopy in the long wavelength regime
(Elsevier B.V., 2020-10-05)
Ultrasonic spectroscopy is a technique that often has been used for measuring the particle size distribution in suspensions and emulsions. The ability to analyze concentrated heterogeneous systems and optically opaque ...
Evaluation of the density distribution in MDF's using ultrasonic wave technique
(Ipef-inst Pesquisas Estudos FlorestaisPiracicabaBrasil, 2007)
The effect of the angle of instrumentation of the piezoelectric ultrasonic scaler on root surfaces
(2015)
To evaluate the influence of variations in the working angle of the piezoelectric ultrasonic scaler (PUS) on root surfaces. Material and methods Fifty-five uniradicular bovine teeth were used, of which 25 teeth were used ...
Two diode lasers versus ultrasonic activation of EDTA: push-out analysis and penetrability by confocal analysis
(2021-03-01)
EDTA solution removes smear layers; this function is more effective when the solution is agitated. The purpose of this study was to evaluate the protocol application of two diode lasers, compared with conventional energization ...
Improving ultrasonic imaging of aluminum plates using phase modulation
(2020-01-01)
Conventional techniques for ultrasonic image beamforming use amplitude information to produce the im-ages. Although amplitude images can be obtained with high quality, they can also present limitations regarding dead zone, ...