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Fig. 7 | Journal of Orthopaedic Surgery and Research

Fig. 7

From: The accuracy of a novel pedicle screw insertion technique assisted by a special angular scale in the subaxial cervical spine using lateral mass as a reference marker

Fig. 7

A special angular scale that controls the angle (a). The pedicle screw was inserted according to preoperative measurements of pedicle transverse angle (PTA) and pedicle-lateral mass angle (PLMA) (b). The detailed processes were as follows: during the operation, the reference axis was placed parallel to the spinous processes of the cervical spine, and then the adjusting spindle was regulated to achieve the preset PTA. To control PLMA as accurately as possible in clinical practice, after identifying the entry hole, the wire tapping inside the adjusting spindle was first placed perpendicular to the lateral mass and then slightly adjusted to the head or tail side according to the preset PLMA

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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X