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STUDY DESIGN Intervention comparison study. OBJECTIVE To assess postoperative cervical lordosis, clinical outcome, and progression of ossification of the posterior longitudinal ligament (OPLL) in patient of cervical spondylotic myelopathy (CSM) by the OPLL. SUMMARY OF BACKGROUND DATA The posterior approach is usually used for multilevel (≥3) CSM and is(More)
The aim of this study was to analyze the clinical characteristics of thoracic ossified ligamentum flavum (OLF) and to elucidate prognostic factors as well as effective surgical treatment modality. The authors analyzed 106 thoracic OLF cases retrospectively from January 1999 to December 2008. The operative (n = 40) and the non-operative group (n = 66) were(More)
OBJECTIVE The aim of this study was to evaluate the efficacy of endovascular therapy as a primary treatment for spinal dural arteriovenous fistula (DAVF). METHODS The authors reviewed 18 patients with spinal DAVFs for whom endovascular therapy was considered as an initial treatment at a single institute between 1993 and 2006. NBCA embolization was(More)
STUDY DESIGN Retrospective comparative study. OBJECTIVE Two polyetheretherketone (PEEK) cages of different designs were compared in terms of the postoperative segmental kyphosis after anterior cervical discectomy and fusion. SUMMARY OF BACKGROUND DATA Segmental kyphosis occasionally occurs after the use of a stand-alone cage for anterior cervical(More)
STUDY DESIGN A retrospective study. OBJECTIVES To compare the clinical/radiologic outcomes and effects on adjacent segments by Dynesys stabilization. SUMMARY OF BACKGROUND DATA Dynamic stabilization is known to preserve some range of motion (ROM) and to lessen the load on adjacent levels compared with rigid fixation. However, there is concern about the(More)
STUDY DESIGN Retrospective study. OBJECTIVE To assess the relationship between sagittal alignment of the cervical spine and patient-reported health-related quality-of-life scores following multilevel posterior cervical fusion, and to explore whether an analogous relationship exists in the cervical spine using T1 slope minus C2-C7 lordosis (T1S-CL). (More)
To evaluate the effects of cervical artificial disc replacement (ADR) and anterior discectomy and fusion (ACDF) on adjacent spinal alignments. The cohort consisted of 33 patients who undergone single-level cervical ADR (15 patients) and ACDF (18 patients) for radiculopathy, who had not had any previous spine surgery, and who had a minimum follow-up of 2(More)
OBJECTIVE Spinal cord hemangioblastomas are rare tumors. Despite their benign, slow-growing nature, they can cause severe neurological consequences. The purpose of this study was to evaluate variable factors, including clinical features, tumor findings, the extent of resection, and its recurrence or progression, which determine postoperative functional(More)
OBJECT Posterior cervical surgery, expansive laminoplasty (EL) or laminectomy followed by fusion (LF), is usually performed in patients with multilevel (≥ 3) cervical spondylotic myelopathy (CSM). However, the superiority of either of these techniques is still open to debate. The aim of this study was to compare clinical outcomes and postoperative kyphosis(More)
BACKGROUND CONTEXT Recently, nonfusion pedicle-based dynamic stabilization systems (PBDSs) have been developed and used in the management of degenerative lumbar spinal diseases. Still effects on spinal kinematics and clinical effects are controversial. Little biomechanical information exists for providing biomechanical characteristics of pedicle-based(More)