Abstract
In the classic Hirabayashi technique, the lamina door is tethered open via sutures through the spinous process and facet capsule or paravertebral muscle. One of the complications of this technique is postoperative reclosure of opened lamina, causing restenosis of the canal. To date, almost all studies regarding this complication have used only the sagittal diameter of the spinal canal on plain lateral X-ray images, rather than CTs, which allow for assessment of 3 dimensional changes. Furthermore, there is little information on the effect of restenosis on neurologic deficits.
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