With a case of mesial impaction of maxillary first and second molar, the mechanical analysis and clinical applications of a self-made helical spring for the uprighting treatment of mesial impacted molars was introduced.
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| http://dx.doi.org/10.7518/hxkq.2021.03.018 | DOI Listing |
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Impacted molar upright with self-made helical spring.
Hua Xi Kou Qiang Yi Xue Za Zhi
June 2021
Dept. of Orthodontics, Affiliated Stomatology Hospital of Nanchang University, The Key Laboratory of Oral Biomedicine, Nanchang 330006, China.
With a case of mesial impaction of maxillary first and second molar, the mechanical analysis and clinical applications of a self-made helical spring for the uprighting treatment of mesial impacted molars was introduced.
View Article and Find Full Text PDF[Evaluation of Low-contrast Detectability of Iterative Reconstruction Algorithm in High-speed CT Technology for Head].
Nihon Hoshasen Gijutsu Gakkai Zasshi
July 2019
Department of Radiological Technology, Keio University Hospital.
Purpose: The purpose of this study was to assess the feasibility of high-speed CT technology for head without deterioration of low-contrast detectability using the brain LCD (Canon Medical Systems) of iterative reconstruction.
Methods: System performance (SP) function analysis, low-contrast object specific contrast-to-noise ratio (CNR) analysis, and visual evaluation using Scheffe's paired comparison were performed. Additionally, analysis of the correlation of CNR and visual scores was performed.
[The Effect of Metal Artifact Reduction at Different Rotation Time in Computed Tomography].
Nihon Hoshasen Gijutsu Gakkai Zasshi
March 2019
Department of Radiology, Otsu Red Cross Hospital.
Purpose: The purpose of the study was to examine the metal artifact-reducing effects of single energy metal artifact reduction (SEMAR) at different rotation time.
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In situ mechanical and molecular investigations of collagen/apatite biomimetic composites combining Raman spectroscopy and stress-strain analysis.
Acta Biomater
December 2016
Department of Physics, University of York, York, United Kingdom. Electronic address:
Unlabelled: We report the design, fabrication and application of a novel micro-electromechanical device coupled to a confocal Raman microscope that enables in situ molecular investigations of micro-fibers under uniaxial tensile load. This device allows for the mechanical study of micro-fibers with diameters in the range between 10 and 100μm and lengths of several hundred micrometers. By exerting forces in the mN range, the device enables an important force range to be accessed between that of atomic force microscopy and macroscopic stress-strain measurement devices.
View Article and Find Full Text PDFThe realization of a pulsatile implantable impeller pump with low hemolysis.
Artif Organs
April 1989
Department of Biomedical Engineering, Shanghai Second Medical University, China.
A pulsatile implantable impeller pump with low hemolysis was developed without markedly increasing the complexity of the system compared with the nonpulsatile pump. The key to the question is to design a three-dimensional impeller with twisted vanes, compacted by an axial helical spiral and a radial logarithmic spiral so as to reduce the turbulent shear in the pump as the impeller changes its rotations per minute periodically to generate a physiologic pulsatile flow. Both mathematic computation of velocity distribution in the impeller and geometric illustration of the velocity triangle at the top of the vane have demonstrated that the peripheral velocity variation of blood cells in a twisted impeller will be less than that in an untwisted impeller.
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