Atsuo Uchida

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We have developed reasonably strong but bioabsorbable osteosynthetic screws, pins and nails made of ultra high strength poly-L-lactide (PLLA) and evaluated their use in 143 patients. The PLLA implants have the highest strength among those reported to date. They lose about 10% of their initial strength within 8 weeks, about 40% within 4 weeks and nearly 100%(More)
Dear Editor, We thank Dr. Abdel-Wanis and colleagues for their interest in our paper [1]. We do not mean at all to deny the value of Tokuhashi’s score [2] and Tomita’s score [3] as scoring systems to predict a prognosis of patients with metastatic spinal tumours. Our unpublished data showed a significant correlation between each score and survival period in(More)
BACKGROUND Although biliary expandable metallic stents (EMS) improve patency, they are unsuitable for primary biliary stenting. Although plastic tube stents without side holes (PWOS) are also reported to prolong patency, their efficacy remains controversial. GOALS To evaluate clinical utility and relative advantages, we reviewed clinical results of three(More)
A new method based on the score of preoperative magnetic resonance images (MRI) was devised to evaluate cervical spondylotic myelopathy and predict the results of cervical laminoplasty. On T1- and T2-weighted sagittal MRI, the intervertebral disc spaces at each level from the axis to the first thoracic spine were examined as to whether the anterior or(More)
We measured the thickness of the transverse structures associated with the bovine coccygeal transverse processes (bone specimen) by using ultrasonic waves and examined the reliability of this measurement for use in spinal surgery. We first measured the velocity of ultrasonic waves propagating in the spinous process. We then made a hole in the transverse(More)
Patients with breast or thyroid cancer with metastatic spinal tumours are expected to survive relatively longer than patients with other cancers with metastatic spinal tumours. The purpose of this study was to determine the clinical characteristics of long-term survivors of breast or thyroid cancer with metastatic spinal tumours. We studied the clinical(More)
We performed cordectomy, a surgical technique that is infrequently used at present, for a patient with post-traumatic syringomyelia (following complete paraplegia of both lower limbs due to dislocation fracture of the 9th thoracic vertebra), yielding a favourable result. We recommend cordectomy as a surgical technique to which spinal surgeons should give(More)
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