منابع مشابه
Pullout Strength after Expandable Polymethylmethacrylate Transpedicular Screw Augmentation for Pedicle Screw Loosening
OBJECTIVE Pedicle screw fixation for spine arthrodesis is a useful procedure for the treatment of spinal disorders. However, instrument failure often occurs, and pedicle screw loosening is the initial step of a range of complications. The authors recently used a modified transpedicular polymethylmethacrylate (PMMA) screw augmentation technique to overcome pedicle screw loosening. Here, they rep...
متن کاملAxial pullout strength comparison of different screw designs: fenestrated screw, dual outer diameter screw and standard pedicle screw
BACKGROUND The pullout strength of pedicle screws is influenced by many factors, including diameter of the screws, implant design, and augmentation with bone cement such as PMMA. In the present study, the pullout strength of an innovative fenestrated screw augmented with PMMA was investigated and was compared to unaugmented fenestrated, standard and dual outer diameter screw. METHODS Twenty f...
متن کاملBiomechanical Stability and Pullout Strength of the Cervical Artificial Pedicle Screw
Introduction: Surgeons risk injury to the central nervous system when excising neoplastic growths from the anterior spinal canal [1]. One method to facilitate access to this region is to combine laminectomy with unilateral facectomy and pediculectomy. For better exposure, however, surgeons may drill from the origin of the pedicle through the posterio-lateral aspect of the vertebral body [1]. Th...
متن کاملThe Comparison of Pullout Strengths of Various Pedicle Screw Designs on Synthetic Foams and Ovine Vertebrae.
AIM One of the most common problems with transpedicular screws is screw pullout. This study was conducted to measure the pullout strengths of newly designed transpedicular screws. MATERIAL AND METHODS The design of the three group screws were conical cored standard pedicle screw (Type A), dual threaded pedicle screw (Type B), dual core and dual threaded pedicle screw (Type C), respectively. P...
متن کاملPedicle Screw Fixation Study in Immature Porcine Spines to Improve Pullout Resistance during Animal Testing
The porcine model is frequently used during development and validation of new spinal devices, because of its likeness to the human spine. These spinal devices are frequently composed of pedicle screws with a reputation for stable fixation but which can suffer pullouts during preclinical implantation on young animals, leading to high morbidity. With a view to identifying the best choices to opti...
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ژورنال
عنوان ژورنال: Clinical Spine Surgery: A Spine Publication
سال: 2017
ISSN: 2380-0186
DOI: 10.1097/bsd.0000000000000151