Design and Development of a Novel Expanding Pedicle Screw for Use in the Osteoporotic Lumbar Spine
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چکیده
.............................................................................................................................. ii Co-Authorship Statement................................................................................................... iii Acknowledgments.............................................................................................................. iv Table of
منابع مشابه
Accuracy Assessment of Freehand Pedicular Screw Placement
Background: The purpose of this prospective study was to determine the accuracy of pedicular screw insertion withoutthe use of fluoroscopy.Methods: This study was conducted on patients with spinal diseases in need of pedicular screw fixation and fusion.The included patients suffered from such conditions as vertebral fracture, spinal stenosis, kyphosis, tumor, and pelvicf...
متن کاملVariation in Lumbar Vertebral Pedicle Structure with Bone Mineral Density
Introduction: Despite widespread use of pedicles in lumbar spine fixation, relatively little is known regarding variations in pedicle structure particularly in osteoporosis. It is valuable to understand this relationship because pedicles provide an important area for screw fixation and a point of complication when screws penetrate through weak pedicle walls into adjacent structures. Hirano et a...
متن کاملComparison of Expansive Pedicle Screw and Polymethylmethacrylate-Augmented Pedicle Screw in Osteoporotic Sheep Lumbar Vertebrae: Biomechanical and Interfacial Evaluations
BACKGROUND It was reported that expansive pedicle screw (EPS) and polymethylmethacrylate-augmented pedicle screw (PMMA-PS) could be used to increase screw stability in osteoporosis. However, there are no studies comparing the two kinds of screws in vivo. Thus, we aimed to compare biomechanical and interfacial performances of EPS and PMMA-PS in osteoporotic sheep spine. METHODOLOGY/PRINCIPAL F...
متن کاملBiomechanical and Histological Evaluation of an Allograft Anchor for Pedicle Screw Augmentation in an Ovine Model
INTRODUCTION Achieving solid implant fixation to osteoporotic bone presents a challenge to both spinal surgeons and hardware designers. Loss of surgical construct stability as a result of screw loosening is a well-known complication [1,2], particularly in patients with poor bone quality [3,4]. Thus, the development of novel strategies to address the issue of obtaining enhanced bone-to-screw pur...
متن کاملSurgical treatment of the osteoporotic spine with bone cement-injectable cannulated pedicle screw fixation: technical description and preliminary application in 43 patients
OBJECTIVES To describe a new approach for the application of polymethylmethacrylate augmentation of bone cement-injectable cannulated pedicle screws. METHODS Between June 2010 and February 2013, 43 patients with degenerative spinal disease and osteoporosis (T-score <-2.5) underwent lumbar fusion using cement-injectable cannulated pedicle screws. Clinical outcomes were evaluated using a Visual...
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تاریخ انتشار 2017