Toyomi Yoshiiwa

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Bone fusion involves a complex set of regulated signaling pathways that control the formation of new bone matrix and the resorption of damaged bone matrix at the surgical site. It has been reported that systemically administering a single dose of zoledronic acid (ZA) at the optimal time increases the strength of the bone morphogenetic protein (BMP)-mediated(More)
STUDY DESIGN A case report. OBJECTIVE To describe a rare case of symptomatic spinal cord kinking due to focal adhesive arachnoiditis, with ossification of the ligamentum flavum (OLF). SUMMARY OF BACKGROUND DATA Spinal cord kinking without spinal surgery is rare, and symptomatic spinal cord kinking due to focal adhesive arachnoiditis, with OLF is even(More)
STUDY DESIGN Retrospective cross-sectional study. OBJECTIVE This study aimed to elucidate the relationship among facet orientation, kinematics of a spinal unit, and change in lumbar spine canal diameter by using kinetic magnetic resonance imaging. SUMMARY OF BACKGROUND DATA Some studies have suggested an association between increased sagittally oriented(More)
Bone repair involves a complex set of regulated signaling pathways that control the formation of new bone matrix and the resorption of damaged bone matrix at the fracture site. It has been reported that the optimal time point for single-dose zoledronic acid (ZA) administration systemically increased the strength of bone morphogenetic protein(More)
STUDY DESIGN A retrospective clinical study. OBJECTIVES To show the prevalence of deep venous thrombosis (DVT) and pulmonary embolism (PE) after spinal surgery using a D-dimer assay followed by screening with computed tomographic (CT) pulmonary angiography and CT venography. SUMMARY OF BACKGROUND DATA A few studies on DVT development after spinal(More)
STUDY DESIGN Retrospective cross-sectional study. PURPOSE To investigate the relationship between ligamentum flavum (LF) hypertrophy and lumbar segmental motion. OVERVIEW OF LITERATURE The pathogenesis of LF thickening is unclear and whether the thickening results from tissue hypertrophy or buckling remains controversial. METHODS 296 consecutive(More)
STUDY DESIGN Retrospective cross-sectional study. OBJECTIVE This study aimed to elucidate the relationship between developmental spinal canal stenosis (DCS) and morphologic features in the cervical spine by comparing the features between DCS and nondevelopmental spinal canal stenosis (NDCS). SUMMARY OF BACKGROUND DATA DCS is an important predisposing(More)
STUDY DESIGN Cross-sectional study. PURPOSE To investigate the relationship between ligamentum flavum (LF) thickening and lumbar segmental instability and disc degeneration and facet joint osteoarthritis. OVERVIEW OF LITERATURE Posterior spinal structures, including LF thickness, play a major role in lumbar spinal canal stenosis pathogenesis. The cause(More)
To describe the first case of a patient who developed acute celiac artery compression syndrome (ACACS) after extensive correction of sagittal balance on an adult spinal deformity. A 77-year-old woman presented with low back pain and spinal kyphosis deformity. We performed a two-stage correction with extreme lateral interbody fusion (XLIF), and her lumbar(More)
STUDY DESIGN Retrospective study. OBJECTIVES The purpose of the present study was to elucidate the clinical features of cervical pyogenic spondylitis and intraspinal abscess and to use this knowledge for early diagnosis and treatment. SUMMARY OF BACKGROUND DATA Cervical pyogenic spondylitis and intraspinal abscess are relatively rare diseases in which(More)