Methods: 60 human adult sacrum specimens were used to study the following parameters: 1) the height and the width of the pedicle of vertebral arch of the first sacral vertebrae;2) the length of screw passage;3) the angle between the axis of pedicle of vertebral arch and the median sagittal plane.

Objective To analyze the image diagnosis and differential diagnosis of bone destruction with soft-tissue tumor in sacrum.

Objective To evaluate the CT findings and clinical application in sacrum neoplasms.

The Imageology Localization of Lumbosacral Vertebrae of Microendoscopic Disectomy and Its Clinical Application;

Objective: To measure the angles of zygapophysial joints and to investigate their internal regularity on lumbosacral vertebrae in order to provide the morphological data for clinical application.

Result: Of the 24 patients with unstable lumbosacrum treated with anterior lumbosacral Reconstruction, there were 18 cases who had a .