Toggling effect on pullout performance of pedicle screws: Review
نویسندگان
چکیده
منابع مشابه
Pullout performance comparison of pedicle screws based on cement application and design parameters.
Pedicle screws are the main fixation devices for certain surgeries. Pedicle screw loosening is a common problem especially for osteoporotic incidents. Cannulated screws with cement augmentation are widely used for that kind of cases. Dual lead dual cored pedicle screw has already given promising pullout values without augmentation. This study concentrates on the usage of dual lead dual core wit...
متن کاملEffect of Pilot Hole Tapping on Pullout Strength and Insertion Torque of Dual Core Pedicle Screws.
OBJECTIVE To evaluate the influence of pilot hole tapping on pullout resistance and insertion torque of pedicle screws with a conical core. METHODS Mechanical tests using a universal testing machine were performed on pedicle screws with a conical core that were inserted into pedicles in the fifth lumbar vertebra of calves. The insertion torque was measured using a torque meter with a capacity...
متن کاملPullout strength of pedicle screws versus pedicle and laminar hooks in the thoracic spine.
While the biomechanical properties of pedicle screws have proven to be superior in the lumbar spine, little is known concerning pullout strength of pedicle screws in comparison to hooks in the thoracic spine. In vitro biomechanical pullout testing was performed to evaluate the axial pullout strength of pedicle screws versus pedicle and laminar hooks in the thoracic spine with regard to surgical...
متن کاملDependence of the pullout behaviour of pedicle screws on the screw-hosting material relative deformability
Indications exist in literature that a screw's pullout behaviour is among others influenced by the relative deformability of the screw and its hosting material. In addition it is known that the stress field developed in the vicinity of an orthopaedic implant significantly influences bone remodelling. In this context an experimentally validated finite element model of a screw and its hosting mat...
متن کاملComparison and prediction of pullout strength of conical and cylindrical pedicle screws within synthetic bone
BACKGROUND This study was designed to derive the theoretical formulae to predict the pullout strength of pedicle screws with an inconstant outer and/or inner diameter distribution (conical screws). For the transpedicular fixation, one of the failure modes is the screw loosening from the vertebral bone. Hence, various kinds of pedicle screws have been evaluated to measure the pullout strength us...
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ژورنال
عنوان ژورنال: International Advanced Researches and Engineering Journal
سال: 2020
ISSN: 2618-575X
DOI: 10.35860/iarej.722229