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Feasibility of Translaminar Screw Placement in Korean Population: Morphometric Analysis of Cervical Spine

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Figure

Fig. 1. Morphometric measurement on cervical computed tomography: A, translaminar length was measured from the junction of the lateral mass and lami-na to the contralateral outer cortex of the spinous process; B, laminar thickness was measured as the greatest maximum thickness spanning from the ven-tromedial to the dorsolateral sides of the central portion of the lamina bilaterally; C, laminar height was recorded as the maximal height between the spinous process and the base of the pedicle in the coronal plane; and D, the sagittal-diagonal measurement was made from the most rostral point of the lamina to the most caudal portion of the lamina.
Fig. 2. Scatter plot between body height and translaminar length, thickness, height, and sagittal diagonal in cervical spine showed no linear relationship (all R2<0.100)
Table 1. Morphometric Analysis of C3–C7 Vertebral Laminar
Table 2. Comparison of Translaminar 3.5 mm Screw Acceptance Rate with 0.5 mm Safety Margin

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