Shoichiro Ohyama

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STUDY DESIGN A retrospective cohort study with prospectively collected data. OBJECTIVE The aim of this study was to investigate the clinical and radiological outcome of cervical laminoplasty for cervical myelopathy with degenerative spondylolisthesis. SUMMARY OF BACKGROUND DATA The presence of spondylolisthesis is thought to represent segmental(More)
OBJECTIVE Numerous reports have been published on the effectiveness and safety of correction of the coronal Cobb angle and thoracolumbar sagittal alignment in patients with adolescent idiopathic scoliosis (AIS). Suboptimal sagittal alignment, such as decreased thoracic kyphosis (TK), after corrective surgery, is a possible cause of lumbar or cervical spinal(More)
STUDY DESIGN Retrospective review of prospectively-collected data. OBJECTIVE To determine the incidence pleural fluid (PF) and its associated risk factors after posterior corrective spinal fusion (PCSF) in patients with adolescent idiopathic scoliosis (AIS). SUMMARY OF BACKGROUND DATA Subclinical PF is often observed after PCSF in AIS patients. However,(More)
Lumbar spinal stenosis (LSS) is one of the most frequent causes of low back pain and gait disturbance in the elderly. Ligamentum flavum (LF) hypertrophy is the main pathomechanism of LSS, but the reason for its occurrence is not clearly elucidated. In this study, we established a novel animal model of intervertebral mechanical stress concentration and(More)
BACKGROUND Balloon kyphoplasty or vertebroplasty is widely performed as a surgical intervention for osteoporotic vertebral fracture (OVF) and the effects have been investigated in many previous studies. However, the influence of the timing of the procedure on patient outcomes has not been studied formally. The purpose of this study was to investigate(More)
STUDY DESIGN Retrospective analyses of prospectively collected data regarding 180 patients with cervical spondylotic myelopathy (CSM). OBJECTIVE To detect the characteristics of C3-4 level CSM in elderly patients (C3-4CSM) (main analysis) and to validate the postoperative outcomes of anterior cervical discectomy and fusion (ACDF) and of laminoplasty(More)
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