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Fig. 1 | BMC Surgery

Fig. 1

From: Free-hand technique of C7 pedicle screw insertion using a simply defined entry point without fluoroscopic guidance for cervical spondylotic myelopathy patients with C3 to C6 instrumented by lateral mass screws: a retrospective cohort study

Fig. 1

Illustration of two different trajectories for C7 pedicle screw insertion. Axis of cylinder A passed through the center of C7 pedicle while axis of cylinder B penetrated the posterior aspect of C7 at the midpoint of the base of superior facet

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BMC Surgery

ISSN: 1471-2482

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