نتایج جستجو برای: pull out strength
تعداد نتایج: 1014337 فیلتر نتایج به سال:
Pull-out fracture of lag-screw bolt is brittle and has a large dispersion in strength. therefore, the bucking pipe preceding pull-out controls strength toughness joint. The sandwiched between bolts fixed to base plate. method little dispersion, can be controlled by adjusting thickness length effect was confirmed experiments. it also that once maximum load reached, restored exchanging pipe.
BACKGROUND Cement augmentation of pedicle screws increases fixation strength in an osteoporotic spine. This study was designed to determine the cement distribution and the correlation between the pull-out strength of the augmented screw and the cement volume within polyurethane (PU) foam. METHODS Twenty-eight cannulated pedicle screws (6×45 mm) (Peter Brehm, Erlangen, Germany) with four holes...
The aim of this biomechanical study was to investigate the role of the dorsal vertebral cortex in transpedicular screw fixation. Moss transpedicular screws were introduced into both pedicles of each vertebra in 25 human cadaver vertebrae. The dorsal vertebral cortex and subcortical bone corresponding to the entrance site of the screw were removed on one side and preserved on the other. Biomecha...
Enhancing the properties of dental resin composites is of interest to researchers. The objective of the present investigation was to improve the strength and fracture toughness of dental composites via addition of silicon carbide whiskers and substitution of commonly used filler materials with stabilized zirconia ceramic powder. It was also intended to study the effect of powder- to- whisker ra...
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