Learn More
STUDY DESIGN A semi-prospective clinical study was conducted. OBJECTIVES To evaluate the accuracy of a revised scoring system predicting metastatic spinal tumor prognosis and the suitability of the subsequent treatment strategy. SUMMARY OF THE BACKGROUND DATA We used a scoring system for the preoperative evaluation of the prognosis of metastatic spinal(More)
Short latency somatosensory evoked potentials to median or ulnar nerve stimulation were recorded in a patient with syringomyelia. Scalp-recorded far-field P14 was clearly preserved, but spinal N13-P13 components disappeared. Our findings support the hypothesis that spinal N13-P13 is generated by structures intrinsic to the cervical cord, most likely in the(More)
STUDY DESIGN A retrospective study. OBJECTIVE To report the clinical course and significance of postoperative radiolucent zones around pedicle screws. SUMMARY OF BACKGROUND DATA Radiolucent zones around pedicle screws have been considered to indicate loss of fixation, delayed union, or pseudarthrosis. Few reports have described the course and(More)
OBJECTIVE The purpose of this study was to clarify the diagnostic value of ultrasonography in tarsal tunnel syndrome. METHODS Seventeen patients (17 feet) with tarsal tunnel syndrome were treated between 1988 and 2003. Preoperative ultrasonography was performed, and the cause of the syndrome was confirmed intraoperatively in all cases. Long and short axes(More)
PURPOSE Boxer's knuckle is a tear of the metacarpophalangeal (MCP) joint capsule that occurs while punching. Because of the nature of boxing, boxer's knuckle tends to be a chronic condition and often is associated with sagittal band rupture. Chronic cases often feature excessive scarring in the damaged area where the sagittal band and the MCP joint capsule(More)
We have investigated the intervertebral discs of rat-smoking models to demonstrate that smoking is a cause of degenerative intervertebral disc disease. A smoking box was developed for this study. We exposed 8-week-old rats to indirect tobacco smoke inhalation. Each rat was forced to inhale the smoke from one cigarette per hour. The mean blood nicotine level(More)
STUDY DESIGN The effects of nicotine on intervertebral discs in rabbits were studied experimentally. OBJECTIVES To investigate the effects of nicotine on the vascular buds in rabbits for elucidating the mechanism of nicotine-induced vertebral disc degeneration. BACKGROUND DATA Several groups have suggested that cigarette smoking is associated with low(More)
BACKGROUND The Japanese Orthopaedic Association Committee on Tissue Transplantation and Regenerative Medicine has conducted a nationwide survey of the status of bone grafting in Japan every 5 years from 1985. We report here the status of bone grafting from 2000 to 2004, show the trends in bone grafting from 1985 to 2004, and draw attention to the issues(More)
STUDY DESIGN A reliability study was conducted. OBJECTIVE To report the utility of the ossification- kyphosis angle of a decompression site in the sagittal view of MRI in the preoperative evaluation of the effectiveness of posterior decompression for patients with ossification of the posterior longitudinal ligament in the thoracic spine. SUMMARY OF(More)
Many epidemiological surveys have identified smoking as a risk factor for osteoporosis, but it is unclear whether smoking has a direct effect on bone metabolism and if such an effect could cause osteoporosis. Therefore, we examined whether smoking causes osteoporosis based on the impact of smoke exposure on the bones of rats. A rat model of passive(More)