Orthopaedic surgery
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Orthopaedic surgery · May 2009
Comparative StudyThe effects of MRI signal intensity changes and clinical manifestations on prognosis after surgical intervention for cervical spondylotic myelopathy.
To investigate whether the magnetic resonance (MR) T2 image signal intensity ratio and clinical manifestations can predict the prognosis in patients with cervical spondylotic myelopathy (CSM). ⋯ Patients with light or no intramedullary signal changes on T2WI had a good surgical outcome. However, increase of signal intensity ratio and occurrence of the pyramidal sign were associated with a poor prognosis after surgery.
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Orthopaedic surgery · May 2009
Comparative StudyA free-hand technique for pedicle screw placement in the lower cervical spine.
To describe a free-hand method for pedicle screw placement in the lower cervical spine with no intraoperative imaging monitors, and to evaluate the safety of this technique. ⋯ Based on 144 screw placements, cervical pedicle screw insertion utilizing a free-hand technique without intraoperative imaging guidance seems to be safe and reliable. However, solid knowledge of the anatomy of the cervical pedicle and adjacent neurovascular bundles, and careful preoperative review of cervical images, are imperative for successful screw placement in the cervical spine.
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Orthopaedic surgery · May 2009
Comparative StudyLong-term results of thoracolumbar and lumbar burst fractures after short-segment pedicle instrumentation, with special reference to implant failure and correction loss.
To assess the long-term results of short-segment pedicle instrumentation for thoracolumbar and lumbar burst fractures. ⋯ Short-segment pedicle instrumentation provides satisfactory reduction for thoracolumbar and lumbar burst fractures. The relatively high incidence of implant failure and the loss of correction may be caused by various factors, and more adequate fusion is recommended.
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Orthopaedic surgery · Feb 2009
Comparative StudyPosterior pedicle screws combined with shortening and release techniques for lumbar and thoracolumbar adolescent idiopathic scoliosis.
To prospectively evaluate the clinical and radiographic effects of posterior surgery with wide posterior shortening release and segmental pedicle screws techniques in a consecutive group of patients with thoracolumbar /lumbar adolescent idiopathic scoliosis. ⋯ Wide posterior release and segmental pedicle screw instrumentation has excellent radiographic and clinical results with minimal complications.
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Orthopaedic surgery · Feb 2009
Comparative StudyAnalysis of the relationship between morphology of intervertebral disc and some correlated factors following discography in patients with chronic low back pain.
To evaluate the diagnostic effectiveness of discography in discogenic low back pain (LBP). ⋯ (i) Compared with the younger patients, older LBP patients have a lower positive rate of discography despite the presence of more serious degenerative disc changes; (ii) outer layer disruption of the annulus fibrous correlates with positive discography; (iii) MRI intensity changes are not specific in diagnosing discogenic pain. Additional discography is needed to identify the painful disc; and (iv) the contrast volume injected into discs can be affected by a variety of factors which restrict its diagnostic value.