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This study was aimed to evaluate the applicability of a reciprocating movement technique with conventional nickel–titanium files for root canal preparation. Forty‐four simulated canals in resin blocks were used in this study and divided as following four groups according to the instruments used and preparation methods. Group CP (n = 12) and CR (n = 12) were instrumented with continuous rotation using...
To investigate the action mechanism of ϵ‐polylysine (ϵ‐PL) against Escherichia coli (E. coli), a new field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) technology has been developed. The log phase E. coli cells were first incubated with ϵ‐PL for 8 min, then the samples were directly added onto the silicon platelet and the copper grid, followed by a simple...
Esophageal cancer is one of the most common cancer and leading cause of cancer death worldwide. Multiphoton microscopy (MPM) has become a novel optical tool of choice for imaging tissue architecture and cellular morphology based on two‐photon excited fluorescence and second harmonic generation. In this study, we used MPM to image microstructure of human normal esophagus, carcinoma in situ, and early...
Transmission electron forward scatter diffraction (t‐EFSD) is a new technique providing crystallographic information with high resolution on thin specimens by using a conventional electron backscatter diffraction (EBSD) system in a scanning electron microscope. In this study, the impact of tilt angle, working distance, and detector distance on the Kikuchi pattern quality were investigated in a cold‐field...
The scanning electron microscope (SEM) has gone through a tremendous evolution to become a critical tool for many and diverse scientific and industrial applications. The high resolution of the SEM is especially suited for both qualitative and quantitative applications especially for nanotechnology and nanomanufacturing. Quantitatively, measurement, or metrology is one of the main uses. It is likely...
Processing of gray scale images in order to determine the corresponding fractal dimension is very important due to widespread use of imaging technologies and application of fractal analysis in many areas of science, technology, and medicine. To this end, many methods for estimation of fractal dimension from gray scale images have been developed and routinely used. Unfortunately different methods (dimension...
Currently, hematoxylin–eosin (H–E) stained histopathology is the golden standard for diagnosing lung cancer. This time‐consuming procedure needs tissue biopsy, sample fixation, slicing, and labeling. Therefore, the availability of a noninvasive optical diagnosis that can obtain real‐time analysis comparable to golden standard H–E stained histopathology will be of extraordinary benefit to the medical...
This article deals with quantitative applications of the penetration resistance of experimental indentation loading curves without fittings or simulations in terms of the various energetic contributions for an improved understanding. The total applied work upon indentation with pyramids, cones and also spheres is partitioned between the indentation and the long‐range effects including...
The aim of the present in vitro study was the evaluation of a CPP‐ACP paste on preventing dentin/enamel erosion produced by a soft drink; Atomic Force Microscopy and Scanning Electron Microscopy were used. Eighty extracted human incisors free of caries were selected and divided into four groups (each divided in two subgroups); group 1a: intact dentin; group 1b: dentin + soft drink; group 2a: intact...
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