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STUDY DESIGN A cross-sectional study. OBJECTIVE To evaluate the segmental instability of wedging segments using dynamic films and the impact of osteophyte formation on segmental motion in degenerative lumbar scoliosis (DLS). SUMMARY OF BACKGROUND DATA Evaluation of segmental instability in DLS is essential for spinal surgery to make the decision "fusion(More)
Preoperative definitive diagnosis of intradural lumbar disc herniation (ILDH) is difficult despite the availability of various neuroradiological investigative tools. We present a case of ILDH diagnosed preoperatively by discography and computed tomography-discography (disco-CT).The patient was a 63-year-old man with acute excruciating right leg pain.(More)
OBJECT Minimally invasive decompressive surgery using a microscope or endoscope has been widely performed for the treatment of lumbar spinal canal stenosis (LSS). In this study the authors aimed to assess outcomes following microscopic bilateral decompression via a unilateral approach (MBDU) in terms of postoperative bone regrowth and preservation of the(More)
OBJECTIVE Increasing soft-tissue mass posterior to the odontoid process causes spinal cord compression. Retro-odontoid pseudotumors are considered to be associated with atlantoaxial instability in patients with rheumatoid arthritis (RA), but the exact mechanism by which these lesions develop has not been elucidated. The purpose of this study was to identify(More)
Objective The lumbar lesion in rheumatoid arthritis (RA) have been paid less attention, but some previous studies demonstrated the high prevalence of lumbar spondylolisthesis and lumbar scoliosis. The lumbar lesion accompanied with RA is often difficult to treat, and it is important to know the characteristics of lumbar lesion in RA patients. The purpose of(More)
OBJECTIVE Little is known about the relationship between sagittal spinal alignment in patients with lumbar spinal canal stenosis (LSS) and objective findings such as spinopelvic parameters, lumbar back muscle degeneration, and clinical data. The purpose of this study was to identify the preoperative clinical and radiological factors that predict improvement(More)
OBJECT More information about the association between preoperative anterior translation of the C-7 plumb line and clinical outcomes after decompression surgery in patients with lumbar spinal canal stenosis (LSS) would help resolve problems for patients with sagittal imbalance. The authors evaluated whether preoperative sagittal alignment of the spine(More)
Purpose The purpose of this study was to analysis the radio-graphic results of a series of 40 adolescent idiopathic scoliosis (AIS) patients treated by posterior corrective surgery utilizing 2 different stiffness rods of 6.35mm diameter. There are three major unique points in our technique. 1) Pedicle screws (PS) were inserted when preoperative evaluation(More)
Study Design: A retrospective study. Purpose: To assess postoperative bone regrowth at surgical sites after lumbar decompression with >5 years of follow-up. Postopera-tive preservation of facet joints and segmental spinal instability following surgery were also evaluated. Overview of Literature: Previous reports have documented bone regrowth after(More)
STUDY DESIGN Retrospective cohort study. PURPOSE The purpose of this study was to evaluate the prevalence of diffuse idiopathic skeletal hyperostosis (DISH) in patients with spinal diseases determined by roentgen images of the whole spine. OVERVIEW OF LITERATURE Although several studies have investigated the prevalence of DISH in healthy subjects, no(More)
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