螺旋CT对颈椎前路经椎弓根内固定安全性评估

Abstract

Abstract:

Objective　To investigate the value of spiral CT on cervical anterior transpedicular screw insertion.　Methods　The cervical pedicle (C3~7) parameters for anterior transpedicular fixation from six cadaveric specimens were measured under CT scan and three dimensionally reconstructed. Cervical anterior transpedicular screws were implanted into cadaveric pedicles on the basis of the measured parameters. The position of cervical anterior transpedicular screws was evaluated by CT and reconstructing images, followed by the safety evaluation of screws insertion using Tomasino's method.　Results　In all of 60 pedicles (C3~7) measured, 4 was too small (the width of the pedicle<4.0 mm), and 1 was too closed to the upper plate, to be fixed. 55 screws were implanted successfully. Tomasino's evaluation demonstrated that, , Grade 1, 2 and 3 were 52, 2, and 1 screws in axial plane, and 52, 2, and 3 screws in saggital plane respectively.　Conclusions　Preoperative spiral CT scan is a valuable evaluation for safe insertion of cervical anterior transpedicular screw.

Key words: Cervical vetebrae, Anterior approach, Pedicle screw, Corpectomy, CT

CLC Number:

JIANG 　Jian, CHEN , ZHAO , LIU Zhi-Li, YIN Qiang-Shui, SHU 　Yong, HUANG Shan-Hu. The evaluation of spiral CT scans on the safety of cervical anterior transpedicular screw fixation[J]. Chinese Journal Of Clinical Anatomy, 2011, 29(6): 658-660.

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The evaluation of spiral CT scans on the safety of cervical anterior transpedicular screw fixation

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