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Treatment of Thoracolumbar Spinal Fracture Accompanied by Diffuse Idiopathic Skeletal Hyperostosis Using Transdiscal Screws for Diffuse Idiopathic Skeletal Hyperostosis: Preliminary Results

Ikuma H, Takao S, Inoue Y, Hirose T, Matsukawa K, Kawasaki K

Study Design This retrospective case series enrolled 13 patients who underwent posterior fixation with both transdiscal screws for diffuse idiopathic skeletal hyperostosis (TSDs) and pedicle screws (PSs) to treat spinal injury...
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Influence of Epidural Ropivacaine with or without Dexmedetomidine on Postoperative Analgesia and Patient Satisfaction after Thoraco-Lumbar Spine Instrumentation: A Randomized, Comparative, and Double-Blind Study

Qureshi F, Meena SC, Kumar V, Jain K, Chauhan R, Luthra A

Study Design This was a prospective, randomized, and double-blind study. Purpose Thoraco-lumbar spine surgery is associated with severe postoperative pain and can cause chronic pain. We aimed to compare the impact of epidural...
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Does Percutaneous Lumbosacral Pedicle Screw Instrumentation Prevent Long-Term Adjacent Segment Disease after Lumbar Fusion?

Changoor S, Faloon MJ, Dunn CJ, Sahai N, Issa K, Sinha K, Hwang KS, Emami A

Study Design Retrospective cohort study. Purpose To assess long-term clinical outcomes of adjacent segment disease (ASD) in patients who underwent lumbar interbody fusion with percutaneous pedicle screw (PS) instrumentation. Overview of Literature ASD is a...
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Significance of Preoperative Prone Position Computed Tomography in Free Hand Subaxial Cervical Pedicular Screwing

İştemen , Arslan A, Olguner SK, Afşer KA, Açık V, Arslan B, Ökten A, Gezercan Y

Objective : The subaxial cervical pedicle screwing technique shows powerful biomechanical properties for posterior cervical fusion. When applying a pedicle screw using the freehand technique, it is essential to analyse...
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Development of Neuromonitoring Pedicle Screw - Results of Electrical Resistance and Neurophysiologic Test in Pig Model

Bang WS, Park J, Kim KT, Cho DC, Riew KD, Kim DH, Han IB, Hyun SJ, Yoon DH, Kim YB

Objective: To analyze the electrical resistance of a newly developed neuromonitoring pedicle screw (Neuro-PS) and to verify the electrophysiologic properties of the Neuro-PS in a pig model. Methods: We developed 2...
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Does Three-Dimensional Printed Patient-Specific Templates Add Benefit in Revision Surgeries for Complex Pediatric Kyphoscoliosis Deformity with Sublaminar Wires in Situ? A Clinical Study

Shah K, Gadiya A, Shah M, Vyas D, Patel P, Bhojraj S, Nene A

Study Design: Case-control study. Purpose: To evaluate the accuracy of three-dimensional (3D) printed patient-specific templates (PSTs) for placement of pedicle screws (PAs) in patients undergoing revision surgeries for complex kyphoscoliosis deformity...
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Comparison of Implant Failure between Cement Augmented Cannulated Pedicle Screws and Solid Pedicle Screws and Associated Risk Factors in Lumbar Fusion Surgery: A Pilot Study

Choi SH, Hur JM, You JY, Kang CN

Objectives: To compare and analyze the rate and risk factors of implant failure according to the use of solid pedicle screws or cement augmented cannulated pedicle screws in lumbar fusion...
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Clinical Effects and Complications of Pedicle Screw Augmentation with Bone Cement: Comparison of Fenestrated Screw Augmentation and Vertebroplasty Augmentation

Kim JH, Ahn DK, Shin WS, Kim MJ, Lee HY, Go YR

Background: Pedicle screw augmentation with bone cement has been experimentally demonstrated to increase the pullout strength. However, the mechanisms of screw loosening are complicated and interacting. Although vertebroplasty augmentation and...
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Identification of Pedicle Screw Pullout Load Paths for Osteoporotic Vertebrae

Krishnan V, Varghese V, Kumar GS, Yoganandan N

Study Design: A biomechanical study. Purpose: To determine the actual load path and compare pullout strengths as a function of screw size used in revision surgeries using postmortem human subject specimens. Overview...
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Correlation between the Computed Tomography Values of the Screw Path and Pedicle Screw Pullout Strength: An Experimental Study in Porcine Vertebrae

Ikeura A, Kushida T, Oe K, Kotani Y, Ando M, Adachi T, Saito T

Study Design: Biomechanical study. Purpose: To assess the correlation between the computed tomography (CT) values of the pedicle screw path and screw pull-out strength. Overview of Literature: The correlation between pedicle screw...
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Bicortical Screw Purchase at Upper Instrumented Vertebra (UIV) Can Cause UIV Fracture After Adult Spinal Deformity Surgery: A Finite Element Analysis Study

Wui SH, Hyun SJ, Kang B, Kim KJ, Jahng TA, Kim HJ

Objective: To examine the biomechanical stress distribution at the upper instrumented vertebra (UIV) according to unicortical- and bicortical purchase model by finite element analysis (FEA). Methods: A T8 to Sacrum with...
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A Prospective Study on the Feasibility, Safety, and Efficacy of a Modified Technique to Augment the Strength of Pedicle Screw in Osteoporotic Spine Fixation

Tandon V, Kalidindi KKV, Pacha S, Bhat MR

Study Design: Prospective case study. Purpose: Osteoporotic spine fixation by pedicle screw instrumentation is complicated by screw loosening, migration, or pullout with rates of up to 62% documented in the literature....
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Posterior Correction of Adolescent Idiopathic Scoliosis with High-Density Pedicle Screw-Only Constructs: 5 Years of Follow-Up

Hwang CJ, Baik JM, Cho JH, Yoon SJ, Lee DH, Lee CS

PURPOSE: This study aimed to analyze radiological outcomes in patients with adolescent idiopathic scoliosis (AIS) who underwent posterior correction with high-density pedicle screw-only constructs. We hypothesized that high-density pedicle screw-only...
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Insertion Angle of Pedicle Screws in the Subaxial Cervical Spine: The Analysis of Computed Tomography-Navigated Insertion of Pedicle Screws

Oikonomidis S, Beyer F, Meyer C, Baltin CT, Eysel P, Bredow J

Study Design: Four orthopedic spine surgeons measured the radiological parameters of pedicle screws in the cervical spine using a postoperative computed tomography (CT) scan. Purpose: This study analyzed the insertion angle...
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Posterior Device Fixation Using Pedicle Screws in Patients with Degenerative Spine Disease: A Prospective, Single-Group, Therapeutic Pilot Study

Shin JW, Park SR, Kim SK, Kim HS

Study Design: Prospective study. Objectives: To evaluate the effectiveness and safety of posterior interbody fusion with a new type of pedicle screws after posterior decompression for degenerative spinal disease. Summary of Literature...
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Accuracy of Freehand versus Navigated Thoracolumbar Pedicle Screw Placement in Patients with Metastatic Tumors of the Spine

Ramos RDLG, Echt M, Benton JA, Gelfand Y, Longo M, Yanamadala V, Yassari R

Objective : To compare the accuracy and breach rates of freehand (FH) versus navigated (NV) pedicle screws in the thoracic and lumbar spine in patients with metastatic spinal tumors. Methods :...
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Early Failure of Cortical-Bone Screw Fixation in the Lumbar Spinal Stenosis

Kwon JW, Kim JG, Ha JW, Moon SH, Lee HM, Park Y

Purpose: Pedicle screw insertion has been traditionally used as a surgical treatment for degenerative lumbar spine disease. As an alternative, the cortical-bone trajectory screw allows less invasive posterior lumbar fixation...
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Postoperative Low Back Pain after Posterior Lumbar Interbody Fusion Surgery Using Cortical Bone Trajectory Screws

Nakajima N, Maenaka T, Kano H

Study Design: Retrospective analysis of a case series of prospectively collected data. Purpose: To compare clinical and radiological outcomes between two posterior lumbar interbody fusion techniques: cortical bone trajectory (CBT)...
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Comparison of Percutaneous versus Open Pedicle Screw Fixation for Treating Unstable Thoracolumbar Fractures

Han JY, Kwon KY

PURPOSE: This study compared the clinical and radiological results between two groups of patients with percutaneous fixation or conventional fixation after hardware removal. MATERIALS AND METHODS: The study analyzed 68 patients...
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Percutaneous Pedicle Screw Fixation in Thoracolumbar Fractures: Comparison of Results According to Implant Removal Time

Oh HS, Seo HY

BACKGROUND: The purpose of this study was to determine whether restoration of range of motion (ROM) could be achieved by implant removal after natural bone healing and consolidation of fractured...
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