结果26.0%（157/604）的螺钉和31.5%（46/143）的患者存在固定节段椎体的上关节突不同程度的破坏。

Results CT scan showed that 26.0%(157/604) of the screws and 31.5%(46/143) of the patients had various degrees of facet joint violation.

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目的通过测量T1-8节段胸椎肋椎关节的形态学特征，探讨经肋椎关节进钉的可行性及临床意义。

Objective To evaluate the morphology of costovertebral joints in the normal thoracic spine(T1-8), and to explore the feasibility and clinical significance of thoracic extrapedicular fixation.

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小鼠在气管插管麻醉下行l 5椎板切除术和L5 - L 6小关节切除术，然后显露相应节段的神经根，背根神经节和马尾神经。

L3 laminectomy and L5-L6 facetectomy was performed under tracheal cannula anesthesia in rats, and then unfolded nerve roots, dorsal root ganglion and cauda coccygeal nerve at corresponding segment.

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