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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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Radiographic and Clinical Outcomes Following Pedicle Subtraction Osteotomy : Minimum 2-Year Follow-Up Data

Choi HY, Hyun SJ, Kim KJ, Jahng TA, Kim HJ

Objective : The purpose of this study was to report the results of pedicle subtraction osteotomy (PSO) for fixed sagittal imbalance with a minimum 2-year follow-up. Besides, authors evaluated the...
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Trends in Incidence and Treatment of Herniated Lumbar Disc in Republic of Korea : A Nationwide Database Study

Jung Jm, Lee SU, Hyun SJ, Kim KJ, Jahng TA, Oh CW, Kim HJ

Objective : This study aimed to determine the incidence and analyze trends of the herniated lumbar disc (HLD) based on a national database in the Republic of Korea (ROK) from...
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Surgical Outcomes According to Dekyphosis in Patients with Ossification of the Posterior Longitudinal Ligament in the Thoracic Spine

Kim SY, Hyun SJ, Kim KJ, Jahng TA

Objective : Ossification of posterior longitudinal ligament (OPLL) in the thoracic spine may cause chronic compressive myelopathy that is usually progressive, and unfavorable by conservative treatment. Although surgical intervention is...
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Clinical Efficacy of Intra-Operative Cell Salvage System in Major Spinal Deformity Surgery

Choi HY, Hyun SJ, Kim KJ, Jahng TA, Kim HJ

OBJECTIVE: The purpose of this study was to determine the efficacy of intra-operative cell salvage system (ICS) to decrease the need for allogeneic transfusions in patients undergoing major spinal deformity...
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Clinical and Radiological Outcomes of Posterior Vertebral Column Resection for Severe Spinal Deformities

Lee BH, Hyun SJ, Kim KJ, Jahng TA, Kim YJ, Kim HJ

OBJECTIVE: The aim of this study was to investigate clinical and radiological outcomes of patients who underwent posterior vertebral column resection (PVCR) by a single neurosurgeon in a single institution. METHODS:...
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Total Deformity Angular Ratio as a Risk Factor for Complications after Posterior Vertebral Column Resection Surgery

Lee BH, Hyun SJ, Han S, Jeon SI, Kim KJ, Jahng TA, Kim HJ

OBJECTIVE: The aim of the present study was to identify whether the deformity angular ratio (DAR) influences the occurrence of complications after posterior vertebral column resection (PVCR) and to establish...
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Freehand S2 Alar-Iliac Screw Placement Using K-Wire and Cannulated Screw: Technical Case Series

Choi HY, Hyun SJ, Kim KJ, Jahng TA, Kim HJ

OBJECTIVE: Among the various sacropelvic fixation methods, S2 alar-iliac (S2AI) screw fixation has several advantages compared to conventional iliac wing screw. However, the placement of S2AI screw still remains a...
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Pyogenic Vertebral Osteomyelitis: Clinical Features, Diagnosis, and Treatment

Kwon JW, Hyun SJ, Han SH, Kim KJ, Jahng TA

Pyogenic vertebral osteomyelitis (PVO) may result in neurological deficits and sequelae, so early diagnosis and appropriate treatment are critical. Many previous studies on PVO exist, but our paper has aimed...
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Various MRI Findings of Spinal Ependymoma

Shin YJ, Lee E, Lee JW, Kang Y, Hyun SJ, Kim KJ, Jahng TA, Kim HJ, Kang HS

PURPOSE: To present the typical and atypical magnetic resonance image (MRI) findings of intramedullary spinal ependymomas, and compare these findings with pathological subtypes. MATERIALS AND METHODS: Between January 2003 to November...
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Proximal Junctional Kyphosis and Proximal Junctional Failure Following Adult Spinal Deformity Surgery

Hyun SJ, Lee BH, Park JH, Kim KJ, Jahng TA, Kim HJ

The purpose of this review is the current understanding of proximal junctional kyphosis (PJK) and proximal junctional failure (PJF) following adult spinal deformity (ASD) surgery. We carried out a systematic...
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Effectiveness and Safety of Tranexamic Acid in Spinal Deformity Surgery

Choi HY, Hyun SJ, Kim KJ, Jahng TA, Kim HJ

OBJECTIVE: Spinal deformity surgery has the potential risk of massive blood loss. To reduce surgical bleeding, the use of tranexamic acid (TXA) became popular in spinal surgery, recently. The purpose...
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Surgical Outcome of Adult Idiopathic Chiari Malformation Type 1

Yuh WT, Kim CH, Chung CK, Kim HJ, Jahng TA, Park SB

OBJECTIVE: The pathophysiology of idiopathic Chiari malformation (CM) type 1 is disturbance of free cerebrospinal fluid (CSF) flow and restoration of normal CSF flow is the mainstay of treatment. Additional...
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Long-Term Follow-Up Results of Anterior Cervical Inter-Body Fusion with Stand-Alone Cages

Kim WB, Hyun SJ, Choi H, Kim KJ, Jahng TA, Kim HJ

OBJECTIVE: The purpose of this study was to evaluate long-term follow-up radiologic/clinical outcomes of patients who underwent anterior cervical discectomy and inter-body fusion (ACDF) with stand-alone cages (SAC) in a...
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Posterior Trans-Dural Repair of Iatrogenic Spinal Cord Herniation after Resection of Ossification of Posterior Longitudinal Ligament

Hyun SJ, Kim HK, Kim KJ, Jahng TA, Kim HJ

Iatrogenic spinal cord herniation is a rare complication following spinal surgery. We introduce a posterior trans-dural repair technique used in a case of thoracic spinal cord herniation through a ventral...
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Multiple Intradural Disc Herniations Masquerading as Intradural Extramedullary Tumors: A Case Report and Review of the Literature

Park YS, Hyun SJ, Kim KJ, Jahng TA

Intradural disc herniation is a very rare condition, and multiple intradural disc herniations have not been reported to date. The latter may be confused with intradural extramedullary (IDEM) spinal tumors....
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The Use Fibrin Sealant after Spinal Intradural Tumor Surgery: Is It Necessary?

Won YI, Kim CH, Chung CK, Jahng TA, Park SB

OBJECTIVE: A fibrin sealant is commonly applied after closure of an incidental or intended durotomy to reduce the complications associated with the leakage of cerebrospinal fluid. Routine usage might not...
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Adolescent Idiopathic Scoliosis Treatment by a Korean Neurosurgeon: The Changing Role for Neurosurgeons

Hyun SJ, Kim WB, Park YS, Kim KJ, Jahng TA, Kim YJ

OBJECTIVE: The purpose of this study was to evaluate radiographic/clinical outcomes of adolescent idiopathic scoliosis (AIS) patients treated by a Korean neurosurgeon. METHODS: Ten AIS patients were treated by a single...
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The Change of Sagittal Alignment of the Lumbar Spine after Dynesys Stabilization and Proposal of a Refinement

Park WM, Kim CH, Kim YH, Chung CK, Jahng TA

OBJECTIVE: Dynesys(R) is one of the pedicle-based dynamic lumbar stabilization systems and good clinical outcome has been reported. However, the cylindrical spacer between the heads of the screws undergoes deformation...
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A Comparative Radiographic Analysis of Fusion Rate between L4-5 and L5-S1 in a Single Level Posterior Lumbar Interbody Fusion

Han SH, Hyun SJ, Jahng TA, Kim KJ

OBJECTIVE: This study aimed to investigate radiographic fusion rates at L4-5 and L5-S1 after single level posterior lumbar interbody fusion (PLIF) and evaluate the relationship between fusion rates and preoperative...
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