Abstract:

Objective　To explore sectional anatomy of lumbar spine, and provide morphologic basis for diagnosing and treating lumbar spinal diseases.　Methods　Vertebral body, the pedicle of vertebral arch, vertebral foramen and lamina of vertebral arch on 30 sectional lumbar spinal specimens were observed and analyzed. Results　For different lumbar vertebrae, there was a significant sex difference（P＜0.05 or P＜0.0001）for transverse and sagittal diameters of vertebral body, transverse diameter of vertebral canal, spine index, transverse diameter of pedicle of vertebral arch, the length of OE, but not for sagittal diameter of vertebral canal and  the angle of Z. There was no significant difference among bilateral transverse diameter of pedicle of vertebral arch, and the length of OE in lumbar vertebrae. There was no significant difference for sex and position except that were between cross-sectional A and cross-sectional B at the angle of bilateral vertebral plate, which ranged from 70° to 90°. All of lumbar spinal indexes were less than 1:4.　Conclusions　The results show that, for different lumbar vertebrae, there is a significant sex difference for main morphologic parameters. Some parameters, such as the transverse diameter and sagittal diameter of vertebral body, the spine index, the angle of bilateral vertebral plate, the transverse diameter and sagittal diameter of vertebral canal, are valuable for evaluating the stenosis of vertebral foramen. It is vital to analyze imaging data before selecting optimal translaminar screw.

Key words: Lumbar spine, Lumbar spinal stenosis, Pedicle of vertebral arch, Translaminar screw, Sectional anatomy