Shinya Okuda

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STUDY DESIGN Retrospective study of 27 patients who underwent anterior decompression and fusion (ADF) for treatment of cervical myelopathy due to ossification of the posterior longitudinal ligament (OPLL). OBJECTIVES To compare surgical outcome of ADF with that of laminoplasty. SUMMARY OF BACKGROUND DATA During the period 1986 and 1996, laminoplasty was(More)
STUDY DESIGN Retrospective study of 66 patients who underwent laminoplasty for treatment of cervical myelopathy due to ossification of the posterior longitudinal ligament (OPLL). OBJECTIVES The present study describes surgical results of laminoplasty for treatment of cervical myelopathy due to OPLL and aims to clarify 1) factors predicting outcome and 2)(More)
STUDY DESIGN A retrospective study of 87 patients who underwent posterior lumbar interbody fusion (PLIF) at L4-L5 for L4 degenerative spondylolisthesis. OBJECTIVE To clarify: 1) the correlation between radiologic degeneration of cranial adjacent segment and clinical results, 2) risk factors for radiologic degeneration of cranial adjacent segment, and 3)(More)
BACKGROUND We are aware of no reports on the surgical results of posterior lumbar interbody fusion in elderly patients. The purpose of this study was to investigate the clinical and radiographic results of posterior lumbar interbody fusion with pedicle screws in patients older than seventy years of age and compare them with results in younger patients. We(More)
OBJECT Previous studies of surgical complications associated with posterior lumbar interbody fusion (PLIF) are of limited value due to intrastudy variation in instrumentation and fusion techniques. The purpose of the present study was to examine rates of intraoperative and postoperative complications of PLIF using a large number of cases with uniform(More)
STUDY DESIGN Apoptosis in cervical intervertebral disc cells and cartilaginous endplate cells was examined by the nick end labeling (TUNEL) technique during the process of natural aging and in a mouse experimental spondylosis model. OBJECTIVES To determine the role of apoptosis in aging and degeneration of intervertebral discs by monitoring chronologic(More)
STUDY DESIGN A retrospective case-control study. OBJECTIVE To clarify associations between both lamina horizontalization and facet tropism and adjacent segment degeneration (ASD). SUMMARY OF BACKGROUND DATA We have previously reported coexistence of lamina horizontalization and facet tropism adjacent to the cranial fusion segment as risk factors for(More)
STUDY DESIGN Various amounts of static mechanical load were applied to mouse intervertebral discs in organ cultures. The apoptosis then was examined using nick end labeling. Two mitogen-activated protein kinase (MAPK) inhibitors were added to the medium. OBJECTIVES To establish an experimental model for detecting factors regulating chondrocyte apoptosis(More)
STUDY DESIGN A total of 46 patients undergoing lumbar spine surgery for degenerative lumbar disease and presenting with drop foot were included in this retrospective study. OBJECTIVE To determine which preoperative patients' symptoms were of statistical significance in their effect on surgical outcome. SUMMARY OF BACKGROUND DATA Drop foot is a(More)
The purpose of this retrospective study was to demonstrate the surgical outcomes of anterior spinal fusion (ASF) and posterior subtraction osteotomy (PSO) for osteoporotic vertebral collapse (OVC). Forty patients who underwent surgery for OVC at the thoracolumbar junction with neurological deficits were included in this study. ASF was primarily chosen for(More)