Placement position of artificial vertebral pedicle screws based on the anatomical structure of lumbar nerve roots

doi:10.3969/j.issn.2095-4344.1112

Abstract

Abstract:

BACKGROUND: Artificial vertebra is the best choice for the reconstruction of the spinal structure after posterior total laminectomy. However, there is no connection between the vertebral body and the vertebral pedicle, and vertebral body displacement often occurs, resulting in serious complications.

OBJECTIVE: To explore the effect of anatomical position of lumbar nerve root on the pedicle screw placement of the artificial vertebral body.

METHODS: Ten fresh frozen cadavers were selected, excluding major lumbar diseases and operation history. After the laminectomy and removal of partial pedicle and ligamentum flavum, we marked and measured the anatomical position. The best position of pedicle screw was explored.
RESULTS AND CONCLUSION: (1) The height of the vertebral body measured was significantly different (P < 0.05). (2) However, on the pedicle line, the ratio of the distance between the midpoint of the nerve root to the lower endplate of the upper vertebral body and the upper endplate of the lower vertebra was constant. There was no significant difference between males and females (P > 0.05). There was no significant difference among L₁_-₅ segments (P > 0.05). (3) After complete laminectomy, the best position of the lumbar pedicle screw is at the center of the middle of the nerve root and the lower endplate of the upper vertebral body, that is, the middle and upper 1/3 of the height of the artificial vertebral body.

Key words: Lumbar Vertebrae, Dissection, Bone Nails, Prosthesis Implantation, Tissue Engineering

CLC Number:

R445

Gu Jianhua, Shi Zhicai . Placement position of artificial vertebral pedicle screws based on the anatomical structure of lumbar nerve roots [J]. Chinese Journal of Tissue Engineering Research, 2019, 23(12): 1829-1833.

Figures/Tables 4

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